Định dạng phản hồi API và ví dụ phản hồi JSON

{
  "issues": 1,
  "logs": 2,
  "trace_spans": 3,
  "actions": 1,
  "metrics": 1,
  "already_accepted": 0,
  "context_updated": true,
  "next": "review accepted telemetry in logs, issues, traces, actions, metrics, or live feed",
  "next_action": {
    "code": "review_ingested_telemetry",
    "target": "telemetry_reads"
  }
}

{
  "issues": 0,
  "logs": 1,
  "trace_spans": 0,
  "actions": 1,
  "already_accepted": 0,
  "next": "review accepted telemetry in logs, issues, traces, actions, or live feed",
  "next_action": {
    "code": "review_ingested_telemetry",
    "target": "telemetry_reads"
  }
}

{
  "error": "SDK event ids must be unique within a batch",
  "code": "validation_failed",
  "next": "send release/environment context plus issue, log, span, action, or metric events from a current LogBrew SDK",
  "next_action": {
    "code": "fix_request",
    "target": "request"
  }
}

{
  "logs": [
    {
      "id": "150d1288-bec2-49ec-a036-3f7ac55f1b2d",
      "project_id": "123e4567-e89b-12d3-a456-426614174000",
      "level": "warning",
      "severity": "warning",
      "triage": {
        "effective_severity": "warning",
        "ignored": false,
        "rule_applied": false
      },
      "source": "runtime",
      "message": "checkout retry scheduled",
      "attributes": { "route": "/checkout" },
      "occurred_at": "2026-06-01T12:00:00Z",
      "environment": "production",
      "release": "api@1.2.3",
      "trace_id": "4bf92f3577b34da6a3ce929d0e0e4736",
      "span_id": "00f067aa0ba902b7",
      "service_name": "checkout-api",
      "sdk_name": "@logbrew/node",
      "sdk_version": "0.1.8",
      "next_action": {
        "code": "inspect_trace",
        "target": "trace_summary"
      }
    }
  ],
  "next_cursor": {
    "time": "2026-06-01T12:00:00Z",
    "id": "150d1288-bec2-49ec-a036-3f7ac55f1b2d"
  }
}

{
  "id": "9b2b4b3a-bd4e-4f85-a0f6-48118f037c17",
  "project_id": "123e4567-e89b-12d3-a456-426614174000",
  "fingerprint": "payment-error",
  "severity": "error",
  "triage": {
    "effective_severity": "error",
    "ignored": false,
    "rule_applied": false
  },
  "title": "PaymentError",
  "message": "payment provider timed out",
  "stack_trace": null,
  "attributes": {},
  "environment": "production",
  "release": "checkout@1.2.3",
  "service_name": "checkout-api",
  "trace_id": "4bf92f3577b34da6a3ce929d0e0e4736",
  "span_id": "00f067aa0ba902b7",
  "next_action": {
    "code": "inspect_trace",
    "target": "trace_summary"
  },
  "status": "unresolved",
  "occurrence_count": 2,
  "first_seen_at": "2026-07-13T07:00:00Z",
  "last_seen_at": "2026-07-13T08:00:00Z"
}

{
  "id": "9b2b4b3a-bd4e-4f85-a0f6-48118f037c17",
  "status": "archived",
  "severity": "error",
  "priority": "low",
  "priority_source": "manual"
}

{
  "id": "9b2b4b3a-bd4e-4f85-a0f6-48118f037c17",
  "status": "unresolved",
  "priority": "high",
  "priority_source": "derived",
  "assignee": {
    "user_id": "5d6e7f80-1a2b-4c3d-8e4f-5a6b7c8d9e0f",
    "name": "Ada Example",
    "email": "ada@example.com"
  }
}

{
  "assignee": {
    "type": "team",
    "team_id": "7c1d2e3f-4a5b-4c6d-8e7f-9a0b1c2d3e4f",
    "slug": "payments",
    "name": "Payments"
  }
}

{
  "project_id": "123e4567-e89b-12d3-a456-426614174000",
  "assignees": [
    {
      "user_id": "5d6e7f80-1a2b-4c3d-8e4f-5a6b7c8d9e0f",
      "name": "Ada Example",
      "email": "ada@example.com"
    },
    {
      "user_id": "0f1e2d3c-4b5a-4968-8776-655443322110",
      "name": null,
      "email": "sam@example.com"
    }
  ]
}

{
  "id": "d8ee3a6f-3918-440b-96cb-14166419399a",
  "project_id": "123e4567-e89b-12d3-a456-426614174000",
  "name": "checkout_failed",
  "distinct_id": "user_123",
  "session_id": "session_456",
  "occurred_at": "2026-06-01T12:00:00Z",
  "properties": { "surface": "checkout" },
  "environment": "production",
  "release": "checkout@1.2.3",
  "service_name": "checkout-api",
  "trace_id": "4bf92f3577b34da6a3ce929d0e0e4736",
  "span_id": "00f067aa0ba902b7",
  "next_action": {
    "code": "inspect_trace",
    "target": "trace_summary"
  }
}

{
  "id": "6f1c2d3e-4a5b-4c6d-8e7f-901234567890",
  "event_id": "metric-1",
  "project_id": "123e4567-e89b-12d3-a456-426614174000",
  "name": "http.server.duration",
  "kind": "histogram",
  "value": 12.5,
  "unit": "ms",
  "temporality": "delta",
  "attributes": {},
  "occurred_at": "2026-07-13T08:00:00Z",
  "environment": "production",
  "release": "checkout@1.2.3",
  "trace_id": "4bf92f3577b34da6a3ce929d0e0e4736",
  "span_id": "00f067aa0ba902b7",
  "service_name": "checkout-api",
  "sdk_name": "@logbrew/node",
  "sdk_version": "0.1.8"
}

{
  "project_id": "123e4567-e89b-12d3-a456-426614174000",
  "release": "api@1.2.3",
  "environment": "production",
  "service_name": "checkout-api",
  "issue_count": 3,
  "log_count": 824,
  "trace_span_count": 421,
  "action_count": 19,
  "metric_count": 87,
  "first_seen_at": "2026-06-01T12:00:00Z",
  "last_seen_at": "2026-06-01T12:15:00Z",
  "trace_health": {
    "status": "errors_observed",
    "trace_count": 42,
    "error_trace_count": 3,
    "error_rate_basis_points": 714
  },
  "next_action": {
    "code": "inspect_release_issues",
    "target": "telemetry_issues"
  }
}

{
  "traces": [
    {
      "trace_id": "4bf92f3577b34da6a3ce929d0e0e4736",
      "project_ids": ["123e4567-e89b-12d3-a456-426614174000"],
      "root_span_name": "POST /checkout",
      "root_service_name": "checkout-api",
      "root_operation": "http.server",
      "span_count": 3,
      "error_span_count": 1,
      "service_count": 1,
      "started_at": "2026-06-01T12:00:00Z",
      "duration_ms": 45,
      "services": ["checkout-api"],
      "releases": ["checkout@1.2.3"],
      "environments": ["production"],
      "next_action": {
        "code": "inspect_trace",
        "target": "trace_summary"
      }
    }
  ],
  "next_cursor": null,
  "naming_quality": {
    "evaluated_traces": 1,
    "meaningful_name_traces": 1,
    "generic_name_traces": 0,
    "unmatched_route_traces": 0,
    "generic_operation_traces": 0,
    "truncated": false,
    "next_action": null
  }
}

{
  "error": "log not found",
  "code": "not_found",
  "next": "check the resource id or filters and retry",
  "next_action": {
    "code": "check_resource",
    "target": "resource"
  }
}

{
  "error": "project_id and project_ids are mutually exclusive",
  "code": "validation_failed",
  "next": "use project_id for one project, project_ids=uuid,uuid for two to fifty projects, or omit both for all readable projects",
  "next_action": {
    "code": "fix_request",
    "target": "request"
  }
}

{
  "error": "project selection not found",
  "code": "not_found",
  "next": "refresh readable projects and retry with only project IDs you can read",
  "next_action": {
    "code": "check_resource",
    "target": "resource"
  }
}

{
  "error": "cursor_time and cursor_id must be sent together",
  "code": "validation_failed",
  "next": "send pagination=cursor alone for the first page, then send cursor_time and cursor_id together from next_cursor",
  "next_action": {
    "code": "fix_request",
    "target": "request"
  }
}

{
  "releases": [],
  "next_cursor": null
}

curl --get "https://api.logbrew.co/api/telemetry/issues/$ISSUE_ID/events" \
  --header "Authorization: Bearer $LOGBREW_ACCOUNT_BEARER" \
  --data-urlencode "pagination=cursor" \
  --data-urlencode "limit=1"

{
  "issue_id": "d1776d70-763c-47b5-a8f1-76f593221e2b",
  "events": [
    {
      "id": "db619770-1f7c-4bd5-8310-9f171df8af47",
      "issue_id": "d1776d70-763c-47b5-a8f1-76f593221e2b",
      "project_id": "123e4567-e89b-12d3-a456-426614174000",
      "severity": "error",
      "title": "Checkout failed",
      "message": "Checkout could not complete",
      "stack_trace": null,
      "attributes": {
        "exception": {
          "type": "CheckoutError",
          "mechanism": { "type": "javascript.error", "handled": false }
        },
        "breadcrumbs": [
          {
            "timestamp": "2026-06-01T11:54:59Z",
            "category": "checkout",
            "message": "Checkout started"
          }
        ]
      },
      "diagnostics": {
        "schema_version": 1,
        "exception": {
          "type": "CheckoutError",
          "mechanism": { "type": "javascript.error", "handled": false }
        },
        "breadcrumbs": [
          {
            "timestamp": "2026-06-01T11:54:59Z",
            "category": "checkout",
            "message": "Checkout started"
          }
        ],
        "breadcrumbs_truncated": false
      },
      "environment": "production",
      "release": "api@1.2.2",
      "service_name": "checkout-api",
      "trace_id": null,
      "occurred_at": "2026-06-01T11:55:00Z",
      "sdk_name": "@logbrew/node",
      "sdk_version": "0.1.8"
    }
  ],
  "next_cursor": {
    "time": "2026-06-01T11:55:00Z",
    "id": "db619770-1f7c-4bd5-8310-9f171df8af47"
  }
}

{
  "issue_id": "d1776d70-763c-47b5-a8f1-76f593221e2b",
  "events": [],
  "next_cursor": null
}

[
  {
    "id": "ed5c960b-e728-4637-bcd4-a27dfb1a0e96",
    "project_id": "123e4567-e89b-12d3-a456-426614174000",
    "trace_id": "6e0c63257de34c92bdb0c8f1e9278a50",
    "span_id": "b37ac82563149fed",
    "parent_span_id": null,
    "name": "POST /checkout",
    "operation": "http.server",
    "status": "error",
    "started_at": "2026-06-01T12:00:00Z",
    "duration_ms": 823,
    "attributes": {},
    "environment": "production",
    "release": "api@1.2.3",
    "service_name": "checkout-api",
    "sdk_name": "@logbrew/node",
    "sdk_version": "0.1.8"
  },
  {
    "id": "0c2f7a51-4e8d-4b6a-9f13-2d7e5c8b1a90",
    "project_id": "123e4567-e89b-12d3-a456-426614174000",
    "trace_id": "6e0c63257de34c92bdb0c8f1e9278a50",
    "span_id": "7a085853722dc6d2",
    "parent_span_id": "b37ac82563149fed",
    "name": "POST /v1/charges",
    "operation": "http.client",
    "status": "error",
    "started_at": "2026-06-01T12:00:00.100Z",
    "duration_ms": 640,
    "attributes": {},
    "environment": "production",
    "release": "api@1.2.3",
    "service_name": "checkout-api",
    "sdk_name": "@logbrew/node",
    "sdk_version": "0.1.8"
  }
]

{
  "trace_id": "6e0c63257de34c92bdb0c8f1e9278a50",
  "span_count": 2,
  "error_span_count": 2,
  "service_count": 1,
  "project_count": 1,
  "started_at": "2026-06-01T12:00:00Z",
  "duration_ms": 823,
  "root_span": {
    "span_id": "b37ac82563149fed",
    "parent_span_id": null,
    "name": "POST /checkout",
    "operation": "http.server",
    "status": "error",
    "started_at": "2026-06-01T12:00:00Z",
    "duration_ms": 823,
    "service_name": "checkout-api"
  },
  "slowest_child_span": {
    "span_id": "7a085853722dc6d2",
    "parent_span_id": "b37ac82563149fed",
    "name": "POST /v1/charges",
    "operation": "http.client",
    "status": "error",
    "started_at": "2026-06-01T12:00:00.100Z",
    "duration_ms": 640,
    "service_name": "checkout-api"
  },
  "slowest_path": [
    {
      "span_id": "b37ac82563149fed",
      "parent_span_id": null,
      "name": "POST /checkout",
      "operation": "http.server",
      "status": "error",
      "started_at": "2026-06-01T12:00:00Z",
      "duration_ms": 823,
      "service_name": "checkout-api"
    },
    {
      "span_id": "7a085853722dc6d2",
      "parent_span_id": "b37ac82563149fed",
      "name": "POST /v1/charges",
      "operation": "http.client",
      "status": "error",
      "started_at": "2026-06-01T12:00:00.100Z",
      "duration_ms": 640,
      "service_name": "checkout-api"
    }
  ],
  "error_spans": [
    {
      "span_id": "b37ac82563149fed",
      "parent_span_id": null,
      "name": "POST /checkout",
      "operation": "http.server",
      "status": "error",
      "started_at": "2026-06-01T12:00:00Z",
      "duration_ms": 823,
      "service_name": "checkout-api"
    },
    {
      "span_id": "7a085853722dc6d2",
      "parent_span_id": "b37ac82563149fed",
      "name": "POST /v1/charges",
      "operation": "http.client",
      "status": "error",
      "started_at": "2026-06-01T12:00:00.100Z",
      "duration_ms": 640,
      "service_name": "checkout-api"
    }
  ],
  "services": [
    {
      "service_name": "checkout-api",
      "span_count": 2,
      "error_span_count": 2,
      "max_duration_ms": 823
    }
  ],
  "releases": ["api@1.2.3"],
  "environments": ["production"]
}

curl --request POST "https://api.logbrew.co/api/feed/ticket" \
  --header "Authorization: Bearer $LOGBREW_ACCOUNT_BEARER"

{
  "ticket": "<feed-ticket>",
  "expires_in_seconds": 60,
  "next": "connect with GET /api/feed/live?ticket=<ticket> before the ticket expires",
  "next_action": {
    "code": "connect_live_feed",
    "target": "live_feed"
  }
}

{
  "type": "native_log",
  "data": {
    "id": "150d1288-bec2-49ec-a036-3f7ac55f1b2d",
    "project_id": "123e4567-e89b-12d3-a456-426614174000",
    "level": "warning",
    "severity": "warning",
    "triage": {
      "effective_severity": "warning",
      "ignored": false,
      "rule_applied": false
    },
    "source": "runtime",
    "message": "checkout retry scheduled",
    "attributes": { "route": "/checkout" },
    "occurred_at": "2026-06-01T12:00:00Z",
    "environment": "production",
    "release": "api@1.2.3",
    "trace_id": "4bf92f3577b34da6a3ce929d0e0e4736",
    "span_id": "00f067aa0ba902b7",
    "service_name": "checkout-api",
    "sdk_name": "@logbrew/node",
    "sdk_version": "0.1.8",
    "next_action": {
      "code": "inspect_trace",
      "target": "trace_summary"
    }
  }
}

{
  "error": "issue status must be unresolved, resolved, or archived",
  "code": "validation_failed",
  "next": "use status=unresolved, status=resolved, or status=archived",
  "next_action": {
    "code": "fix_request",
    "target": "request"
  }
}

{
  "project_id": "123e4567-e89b-12d3-a456-426614174000",
  "results": [
    {
      "issue_id": "9b2b4b3a-bd4e-4f85-a0f6-48118f037c17",
      "outcome": "updated",
      "issue": {
        "id": "9b2b4b3a-bd4e-4f85-a0f6-48118f037c17",
        "status": "archived",
        "priority": "high",
        "priority_source": "derived",
        "assignee": null
      }
    },
    {
      "issue_id": "3f1c2d4e-5a6b-4c7d-8e9f-0a1b2c3d4e5f",
      "outcome": "not_found",
      "issue": null
    }
  ]
}

{
  "error": "product analytics project_id is required",
  "code": "validation_failed",
  "next": "choose one owned project and send its project_id",
  "next_action": { "code": "fix_request", "target": "request" }
}

curl --get "https://api.logbrew.co/api/telemetry/analytics/overview" \
  --header "Authorization: Bearer $LOGBREW_ACCOUNT_BEARER" \
  --data-urlencode "project_id=<project_id>" \
  --data-urlencode "since=2026-06-01T11:00:00Z" \
  --data-urlencode "until=2026-06-01T12:00:00Z" \
  --data-urlencode "interval=5m" \
  --data-urlencode "top_limit=2" \
  --data-urlencode "response_version=3"

{
  "schema_version": 3,
  "query": {
    "project_id": "11111111-1111-4111-8111-111111111111",
    "since": "2026-06-01T11:00:00Z",
    "until": "2026-06-01T12:00:00Z",
    "interval": "5m",
    "interval_seconds": 300,
    "top_limit": 2
  },
  "purpose": "Shows what people do in one project through action volume, active identified users, separately labeled anonymous subjects, explicit sessions, activity over time, top actions, and versioned page-view, screen-view, interaction, surface, and exact event-name breakdowns. Exact classified event names can be used as ordered funnel steps. It never infers people from anonymous events or relabels arbitrary unclassified telemetry as product behavior.",
  "analysis_level": "user_and_session",
  "summary": {
    "actions": 120,
    "active_identified_users": 18,
    "active_anonymous_subjects": 7,
    "sessions": 24,
    "distinct_action_names": 3,
    "actions_per_identified_user": 5.555555555555555,
    "actions_per_session": 5.0
  },
  "coverage": {
    "identified_actions": 100,
    "anonymous_actions": 20,
    "subject_coverage": {
      "index_version": 1,
      "identified_user_events": 100,
      "anonymous_subject_events": 20,
      "legacy_unknown_kind_events": 0,
      "missing_subject_events": 0,
      "historical_unindexed_events": 0
    },
    "sessionized_actions": 120,
    "traced_actions": 60,
    "identification_rate": 0.8333333333333334,
    "sessionization_rate": 1.0,
    "trace_link_rate": 0.5,
    "expected_buckets": 12,
    "returned_points": 2,
    "returned_top_actions": 2,
    "top_actions_truncated": true,
    "first_seen_at": "2026-06-01T11:00:10Z",
    "last_seen_at": "2026-06-01T11:09:50Z",
    "limitations": [
      "Typed anonymous subjects are counted separately and never contribute to active identified-user counts.",
      "Actions without a trace ID cannot link product behavior directly to trace investigation."
    ]
  },
  "estimation": {
    "unique_counts_are_approximate": true,
    "method": "approximate_distinct",
    "description": "Active identified-user, anonymous-subject, session, distinct action-name, distinct surface, and distinct exact event-name counts are approximate distinct counts. Event totals and capture-coverage counts are exact within the selected, fully evaluated query window."
  },
  "series": [
    {
      "bucket_start": "2026-06-01T11:00:00Z",
      "bucket_end": "2026-06-01T11:05:00Z",
      "actions": 50,
      "active_identified_users": 8,
      "sessions": 10,
      "identified_actions": 40,
      "sessionized_actions": 50,
      "traced_actions": 25
    },
    {
      "bucket_start": "2026-06-01T11:05:00Z",
      "bucket_end": "2026-06-01T11:10:00Z",
      "actions": 70,
      "active_identified_users": 12,
      "sessions": 14,
      "identified_actions": 60,
      "sessionized_actions": 70,
      "traced_actions": 35
    }
  ],
  "top_actions": [
    {
      "name": "checkout_started",
      "actions": 50,
      "active_identified_users": 12,
      "sessions": 14,
      "share_of_actions": 0.4166666666666667
    },
    {
      "name": "purchase_completed",
      "actions": 40,
      "active_identified_users": 9,
      "sessions": 10,
      "share_of_actions": 0.3333333333333333
    }
  ],
  "classified_activity": {
    "summary": {
      "events": 110,
      "page_views": 50,
      "screen_views": 20,
      "interactions": 40,
      "distinct_surfaces": 4,
      "distinct_event_names": 5,
      "active_identified_users": 17,
      "active_anonymous_subjects": 6,
      "sessions": 23
    },
    "coverage": {
      "classified_actions": 60,
      "unclassified_actions": 60,
      "action_classification_rate": 0.5,
      "surfaced_events": 110,
      "named_events": 110,
      "identified_events": 90,
      "subject_coverage": {
        "index_version": 1,
        "identified_user_events": 90,
        "anonymous_subject_events": 20,
        "legacy_unknown_kind_events": 0,
        "missing_subject_events": 0,
        "historical_unindexed_events": 0
      },
      "sessionized_events": 110,
      "traced_events": 55,
      "surface_rate": 1.0,
      "event_name_rate": 1.0,
      "identification_rate": 0.8181818181818182,
      "sessionization_rate": 1.0,
      "trace_link_rate": 0.5,
      "expected_buckets": 12,
      "returned_points": 2,
      "returned_top_surfaces": 2,
      "returned_top_events": 2,
      "top_surfaces_truncated": true,
      "top_events_truncated": true,
      "first_seen_at": "2026-06-01T11:00:20Z",
      "last_seen_at": "2026-06-01T11:09:40Z",
      "limitations": [
        "Only events carrying supported version-1 analytics annotations appear in classified activity; arbitrary actions and technical spans are not relabeled.",
        "Historical or unannotated actions contribute to the action summary but not to classified screen-view or interaction breakdowns.",
        "Classified events with typed anonymous subjects are counted separately and never contribute to identified-user counts.",
        "Classified events without a trace ID cannot link product behavior directly to trace investigation."
      ]
    },
    "series": [
      {
        "bucket_start": "2026-06-01T11:00:00Z",
        "bucket_end": "2026-06-01T11:05:00Z",
        "events": 45,
        "page_views": 20,
        "screen_views": 10,
        "interactions": 15
      },
      {
        "bucket_start": "2026-06-01T11:05:00Z",
        "bucket_end": "2026-06-01T11:10:00Z",
        "events": 65,
        "page_views": 30,
        "screen_views": 10,
        "interactions": 25
      }
    ],
    "top_surfaces": [
      {
        "kind": "page_view",
        "surface": "/checkout/:step",
        "events": 40,
        "active_identified_users": 12,
        "sessions": 14,
        "share_of_classified_events": 0.36363636363636365
      },
      {
        "kind": "screen_view",
        "surface": "Checkout",
        "events": 20,
        "active_identified_users": 9,
        "sessions": 10,
        "share_of_classified_events": 0.18181818181818182
      }
    ],
    "top_events": [
      {
        "kind": "page_view",
        "event_name": "/checkout/:step",
        "events": 40,
        "active_identified_users": 12,
        "sessions": 14,
        "share_of_classified_events": 0.36363636363636365
      },
      {
        "kind": "interaction",
        "event_name": "checkout_started",
        "events": 30,
        "active_identified_users": 10,
        "sessions": 12,
        "share_of_classified_events": 0.2727272727272727
      }
    ]
  },
  "next_action": {
    "code": "build_product_funnel",
    "target": "/api/telemetry/analytics/funnel",
    "reason": "Use two through eight exact keys from classified_activity.top_events to measure ordered conversion and drop-off for explicit sessions or opaque identified users."
  }
}

{
  "project_id": "aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa",
  "since": "2026-08-01T00:00:00Z",
  "until": "2026-08-02T00:00:00Z",
  "environment": "production",
  "analysis_unit": "session",
  "conversion_window_seconds": 3600,
  "steps": [
    { "kind": "page_view", "event_name": "/pricing" },
    { "kind": "interaction", "event_name": "signup_completed" }
  ]
}

{
  "schema_version": 1,
  "query": {
    "project_id": "aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa",
    "since": "2026-08-01T00:00:00Z",
    "until": "2026-08-02T00:00:00Z",
    "environment": "production",
    "analysis_unit": "session",
    "conversion_window_seconds": 3600
  },
  "purpose": "Shows where explicit sessions or typed opaque user subjects enter, progress, and drop off across two through eight versioned page-view, screen-view, or interaction events. Steps must occur in order with strictly increasing timestamps inside the selected conversion window; raw session and subject identifiers are never returned.",
  "summary": {
    "candidate_units": 60,
    "entered_units": 50,
    "completed_units": 15,
    "entry_rate": 0.8333333333333334,
    "overall_conversion_rate": 0.3
  },
  "coverage": {
    "classified_events": 200,
    "named_events": 180,
    "unnamed_events": 20,
    "unit_identified_events": 160,
    "selected_step_events": 120,
    "usable_selected_step_events": 100,
    "excluded_selected_step_events": 20,
    "event_name_rate": 0.9,
    "selected_unit_coverage_rate": 0.8333333333333334,
    "limitations": [
      "Only supported version-1 classified events with exact derived names participate; arbitrary actions and technical spans are never relabeled.",
      "A unit reaches later steps only when timestamps strictly increase and the final match remains inside conversion_window_seconds from its first match.",
      "Historical or surface-less classified events without a derived event name cannot match exact funnel steps.",
      "Requested-step events without an explicit session ID are excluded from ordered unit counts.",
      "Session funnels count visits or app sessions, not unique people; use analysis_unit=identified_user only when typed user-subject coverage is sufficient."
    ]
  },
  "steps": [
    {
      "position": 1,
      "kind": "page_view",
      "event_name": "/pricing",
      "units": 50,
      "conversion_from_first": 1.0,
      "drop_off_to_next_units": 35,
      "drop_off_to_next_rate": 0.7
    },
    {
      "position": 2,
      "kind": "interaction",
      "event_name": "signup_completed",
      "units": 15,
      "conversion_from_previous": 0.3,
      "conversion_from_first": 0.3
    }
  ],
  "next_action": {
    "code": "compare_funnel_contexts",
    "target": "/api/telemetry/analytics/funnel",
    "reason": "Compare the same exact steps across bounded releases, environments, or services to locate material conversion changes."
  }
}

{
  "error": "product analytics funnel requires two through eight ordered steps",
  "code": "validation_failed",
  "next": "send a steps array containing 2 through 8 exact classified event selectors",
  "next_action": { "code": "fix_request", "target": "request" }
}

{
  "error": "product analytics funnel conversion window must fit inside the query range",
  "code": "validation_failed",
  "next": "use conversion_window_seconds from 1 through the selected range length",
  "next_action": { "code": "fix_request", "target": "request" }
}

{
  "project_id": "11111111-1111-4111-8111-111111111111",
  "since": "2026-06-01T00:00:00Z",
  "until": "2026-06-03T00:00:00Z",
  "response_version": 1,
  "interval": "day",
  "interval_count": 1,
  "mode": "return_on",
  "cohort_mode": "first_in_range",
  "start_event": { "kind": "interaction", "event_name": "checkout_completed" },
  "return_event": { "kind": "interaction", "event_name": "checkout_completed" }
}

{
  "schema_version": 1,
  "query": {
    "project_id": "11111111-1111-4111-8111-111111111111",
    "since": "2026-06-01T00:00:00Z",
    "until": "2026-06-03T00:00:00Z",
    "start_event": { "kind": "interaction", "event_name": "checkout_completed" },
    "return_event": { "kind": "interaction", "event_name": "checkout_completed" },
    "interval": "day",
    "interval_seconds": 86400,
    "interval_count": 1,
    "mode": "return_on",
    "cohort_mode": "first_in_range"
  },
  "purpose": "Measures whether typed opaque user subjects return after their first matching start event inside the selected half-open query range. Returns must occur strictly after each subject's anchor. return_on measures one fixed subject-relative period; return_on_or_after measures from that period's threshold through the exclusive query upper bound. Eligibility-aware denominators prevent immature subjects from being reported as churned, cohorts are fixed buckets aligned to since, and raw subject identifiers are never returned.",
  "summary": {
    "cohort_subjects": 2,
    "subjects_returned_after_start": 1,
    "return_rate_after_start": 0.5,
    "non_empty_cohorts": 2,
    "periods_with_eligible_subjects": 1,
    "fully_observed_periods": 0
  },
  "coverage": {
    "classified_events": 4,
    "named_events": 4,
    "unnamed_events": 0,
    "identified_events": 4,
    "start_events": 3,
    "usable_start_events": 3,
    "excluded_start_events": 0,
    "return_events": 3,
    "usable_return_events": 3,
    "excluded_return_events": 0,
    "event_name_rate": 1.0,
    "start_identity_coverage_rate": 1.0,
    "return_identity_coverage_rate": 1.0,
    "limitations": [
      "Only application-supplied opaque subject IDs explicitly typed as users are counted. Anonymous, legacy-untyped, historical-unindexed, invalid, or absent subjects are excluded rather than inferred as people.",
      "first_in_range anchors each subject at its first matching start inside the selected range; it does not prove that event was the subject's first-ever historical start.",
      "Cohort buckets are fixed-width and aligned to the query's since value. hour, day, week, and thirty_day mean fixed elapsed durations; thirty_day is not a calendar month.",
      "Returns must match the exact selected kind and derived event name, occur strictly after the subject anchor, and remain before the exclusive query upper bound.",
      "This resource does not provide recurring-start cohorts, group retention, arbitrary property breakdowns, custom return ranges, or lifetime first-event lookup.",
      "return_on includes only subjects whose complete exact period ends by until; later subjects are excluded from that period's denominator."
    ]
  },
  "curve": [
    {
      "period": 0,
      "threshold_seconds": 0,
      "window_end_seconds": 86400,
      "eligible_subjects": 1,
      "retained_subjects": 1,
      "weighted_retention_rate": 1.0,
      "fully_observed_cohorts": 1,
      "fully_observed_cohort_average_rate": 1.0,
      "all_subjects_eligible": false
    }
  ],
  "cohorts": [
    {
      "cohort": 0,
      "started_at": "2026-06-01T00:00:00Z",
      "ended_at": "2026-06-02T00:00:00Z",
      "subjects": 1,
      "subjects_returned_after_start": 1,
      "periods": [
        {
          "period": 0,
          "eligible_subjects": 1,
          "retained_subjects": 1,
          "retention_rate": 1.0,
          "all_subjects_eligible": true
        }
      ]
    },
    {
      "cohort": 1,
      "started_at": "2026-06-02T00:00:00Z",
      "ended_at": "2026-06-03T00:00:00Z",
      "subjects": 1,
      "subjects_returned_after_start": 0,
      "periods": [
        {
          "period": 0,
          "eligible_subjects": 0,
          "retained_subjects": 0,
          "all_subjects_eligible": false
        }
      ]
    }
  ],
  "next_action": {
    "code": "extend_retention_observation_window",
    "target": "/api/telemetry/analytics/retention",
    "reason": "Move since earlier, until later, or request fewer periods when a fully observed long-term comparison is required."
  }
}

{
  "project_id": "11111111-1111-4111-8111-111111111111",
  "since": "2026-06-01T00:00:00Z",
  "until": "2026-06-03T00:00:00Z",
  "response_version": 2,
  "interval": "day",
  "interval_count": 1,
  "mode": "return_on",
  "cohort_mode": "first_in_range"
}

{
  "schema_version": 2,
  "query": {
    "project_id": "11111111-1111-4111-8111-111111111111",
    "since": "2026-06-01T00:00:00Z",
    "until": "2026-06-03T00:00:00Z",
    "activity_scope": "all_classified_activity",
    "interval": "day",
    "interval_seconds": 86400,
    "interval_count": 1,
    "mode": "return_on",
    "cohort_mode": "first_in_range"
  },
  "purpose": "Measures whether typed opaque user subjects perform any later supported classified product activity after their first such activity inside the selected half-open range. It does not choose or infer a top event. Returns must occur strictly after the anchor, anonymous and unidentified subjects remain excluded from user counts, eligibility-aware denominators prevent immature subjects from being reported as churned, and raw identifiers are never returned.",
  "coverage": {
    "classified_events": 3,
    "named_events": 3,
    "unnamed_events": 0,
    "identified_events": 3,
    "start_events": 3,
    "usable_start_events": 3,
    "excluded_start_events": 0,
    "return_events": 3,
    "usable_return_events": 3,
    "excluded_return_events": 0,
    "event_name_rate": 1.0,
    "start_identity_coverage_rate": 1.0,
    "return_identity_coverage_rate": 1.0,
    "limitations": [
      "Only application-supplied opaque subject IDs explicitly typed as users are counted. Anonymous, legacy-untyped, historical-unindexed, invalid, or absent subjects are excluded rather than inferred as people.",
      "first_in_range anchors each subject at its first supported classified activity in the range; it does not prove that activity was the subject's first-ever product activity.",
      "Cohort buckets are fixed-width and aligned to the query's since value. hour, day, week, and thirty_day mean fixed elapsed durations; thirty_day is not a calendar month.",
      "Returns are any supported classified activity strictly after the subject anchor and before the exclusive query upper bound; no event is ranked, selected, or inferred.",
      "This resource does not provide recurring-start cohorts, group retention, arbitrary property breakdowns, custom return ranges, or lifetime first-event lookup.",
      "return_on includes only subjects whose complete exact period ends by until; later subjects are excluded from that period's denominator."
    ]
  }
}

{
  "schema_version": 2,
  "summary": {
    "cohort_subjects": 0,
    "subjects_returned_after_start": 0,
    "non_empty_cohorts": 0,
    "periods_with_eligible_subjects": 0,
    "fully_observed_periods": 0
  },
  "curve": [
    {
      "period": 0,
      "threshold_seconds": 0,
      "window_end_seconds": 86400,
      "eligible_subjects": 0,
      "retained_subjects": 0,
      "fully_observed_cohorts": 0,
      "all_subjects_eligible": false
    }
  ],
  "cohorts": []
}

{
  "error": "product analytics retention interval and interval_count would exceed 500 cohort matrix cells",
  "code": "validation_failed",
  "next": "choose a wider interval, a shorter time range, or fewer retention periods",
  "next_action": { "code": "fix_request", "target": "request" }
}

{
  "project_id": "11111111-1111-4111-8111-111111111111",
  "since": "2026-06-01T00:00:00Z",
  "until": "2026-06-03T00:00:00Z",
  "response_version": 1,
  "interval": "day",
  "history_period_count": 2,
  "event": { "kind": "interaction", "event_name": "checkout_completed" }
}

{
  "schema_version": 1,
  "query": {
    "project_id": "11111111-1111-4111-8111-111111111111",
    "since": "2026-06-01T00:00:00Z",
    "until": "2026-06-03T00:00:00Z",
    "history_since": "2026-05-30T00:00:00Z",
    "event": { "kind": "interaction", "event_name": "checkout_completed" },
    "interval": "day",
    "interval_seconds": 86400,
    "history_period_count": 2,
    "expected_buckets": 2
  },
  "purpose": "Classifies typed opaque user subjects for one exact product event in each fixed analysis period. new_within_observed_history means active now with no earlier matching event inside the bounded history window; returning means active now and in the immediately previous period; resurrected means active now, inactive in the previous period, and active earlier in observed history; dormant means active in the previous period but not now. These states are disjoint, incomplete buckets are marked, and raw subject identifiers are never returned.",
  "summary": {
    "observed_subjects": 4,
    "analysis_active_subjects": 3,
    "history_only_subjects": 1,
    "returned_buckets": 2,
    "fully_observed_buckets": 2,
    "latest_fully_observed_period": 1,
    "buckets_with_resurrection": 1,
    "buckets_with_dormancy": 2
  },
  "coverage": {
    "analysis_classified_events": 6,
    "analysis_named_events": 6,
    "analysis_unnamed_events": 0,
    "analysis_identified_events": 6,
    "selected_events": 5,
    "usable_selected_events": 5,
    "usable_selected_sessionized_events": 5,
    "usable_selected_trace_linked_events": 5,
    "excluded_selected_events": 0,
    "history_selected_events": 3,
    "usable_history_selected_events": 3,
    "excluded_history_selected_events": 0,
    "event_name_rate": 1.0,
    "selected_identity_coverage_rate": 1.0,
    "selected_sessionization_rate": 1.0,
    "selected_trace_link_rate": 1.0,
    "history_identity_coverage_rate": 1.0,
    "limitations": [
      "Only application-supplied opaque subject IDs explicitly typed as users are counted. Anonymous, legacy-untyped, historical-unindexed, invalid, or absent subjects are excluded rather than inferred as people.",
      "new_within_observed_history means no earlier selected event between history_since and the current bucket. It does not prove that a subject is a lifetime-new user.",
      "Observed history contains exactly 2 complete fixed periods before since; activity before history_since is intentionally unknown.",
      "Buckets are fixed-width and aligned to since. hour, day, week, and thirty_day mean fixed elapsed durations; thirty_day is not a calendar month.",
      "Returning, resurrected, and dormant compare only the selected exact kind and derived event name. They do not infer intent, identity merges, or causality.",
      "This resource does not provide arbitrary property breakdowns, reusable cohorts, group lifecycle, lifetime first-event lookup, or per-subject lists."
    ]
  },
  "buckets": [
    {
      "period": 0,
      "started_at": "2026-06-01T00:00:00Z",
      "ended_at": "2026-06-02T00:00:00Z",
      "fully_observed": true,
      "active_subjects": 3,
      "new_within_observed_history_subjects": 1,
      "returning_subjects": 1,
      "resurrected_subjects": 1,
      "dormant_subjects": 1,
      "previous_active_subjects": 2,
      "new_share_of_active": 0.3333333333333333,
      "returning_share_of_active": 0.3333333333333333,
      "resurrected_share_of_active": 0.3333333333333333,
      "dormant_share_of_previous_active": 0.5,
      "net_active_change": 1
    },
    {
      "period": 1,
      "started_at": "2026-06-02T00:00:00Z",
      "ended_at": "2026-06-03T00:00:00Z",
      "fully_observed": true,
      "active_subjects": 2,
      "new_within_observed_history_subjects": 0,
      "returning_subjects": 2,
      "resurrected_subjects": 0,
      "dormant_subjects": 1,
      "previous_active_subjects": 3,
      "new_share_of_active": 0.0,
      "returning_share_of_active": 1.0,
      "resurrected_share_of_active": 0.0,
      "dormant_share_of_previous_active": 0.3333333333333333,
      "net_active_change": -1
    }
  ],
  "next_action": {
    "code": "investigate_lifecycle_loss",
    "target": "/api/telemetry/analytics/paths",
    "reason": "The latest complete bucket lost more prior active subjects than it added through new-within-observed-history and resurrected activity; compare bounded journeys around the selected event."
  }
}

{
  "project_id": "11111111-1111-4111-8111-111111111111",
  "since": "2026-06-01T00:00:00Z",
  "until": "2026-06-03T00:00:00Z",
  "response_version": 2,
  "interval": "day",
  "history_period_count": 2
}

{
  "schema_version": 2,
  "query": {
    "project_id": "11111111-1111-4111-8111-111111111111",
    "since": "2026-06-01T00:00:00Z",
    "until": "2026-06-03T00:00:00Z",
    "history_since": "2026-05-30T00:00:00Z",
    "activity_scope": "all_classified_activity",
    "interval": "day",
    "interval_seconds": 86400,
    "history_period_count": 2,
    "expected_buckets": 2
  },
  "purpose": "Classifies typed opaque user subjects by any supported classified product activity in each fixed period. It does not choose or infer a top event. new_within_observed_history, returning, resurrected, and dormant remain disjoint; anonymous and unidentified subjects are excluded from user counts, incomplete buckets are marked, and raw identifiers are never returned."
}

{
  "schema_version": 2,
  "summary": {
    "observed_subjects": 0,
    "analysis_active_subjects": 0,
    "history_only_subjects": 0,
    "returned_buckets": 0,
    "fully_observed_buckets": 0,
    "buckets_with_resurrection": 0,
    "buckets_with_dormancy": 0
  },
  "buckets": []
}

{
  "error": "product analytics lifecycle history must not exceed 62 days",
  "code": "validation_failed",
  "next": "use fewer history periods or a narrower fixed interval",
  "next_action": { "code": "fix_request", "target": "request" }
}

curl --get "https://api.logbrew.co/api/telemetry/metrics/series" \
  --header "Authorization: Bearer $LOGBREW_ACCOUNT_BEARER" \
  --data-urlencode "project_id=<project_id>" \
  --data-urlencode "name=jobs.completed" \
  --data-urlencode "since=2026-06-01T12:00:00Z" \
  --data-urlencode "until=2026-06-01T12:15:00Z" \
  --data-urlencode "interval=5m" \
  --data-urlencode "group_by=service_name"

{
  "schema_version": 1,
  "query": {
    "project_id": "11111111-1111-4111-8111-111111111111",
    "name": "jobs.completed",
    "since": "2026-06-01T12:00:00Z",
    "until": "2026-06-01T12:15:00Z",
    "interval": "5m",
    "interval_seconds": 300,
    "group_by": "service_name",
    "series_limit": 10
  },
  "purpose": "Shows how one metric changes over time without changing its meaning: gauges use sampled state, delta counters use change volume and rate, histograms use distributions, and cumulative streams stay raw when reset-safe change is ambiguous.",
  "coverage": {
    "samples": 5,
    "series": 1,
    "returned_series": 1,
    "points": 2,
    "expected_buckets_per_series": 3,
    "first_seen_at": "2026-06-01T12:00:10Z",
    "last_seen_at": "2026-06-01T12:14:50Z",
    "truncated": false
  },
  "series": [
    {
      "identity": {
        "kind": "counter",
        "unit": "{job}",
        "temporality": "delta",
        "group_by": "service_name",
        "group_value": "checkout-worker"
      },
      "status": "ready",
      "aggregation": {
        "code": "delta_sum",
        "description": "Primary value is the sum of recorded changes in each bucket; rate_per_second normalizes that change by bucket width."
      },
      "sample_count": 5,
      "points": [
        {
          "bucket_start": "2026-06-01T12:00:00Z",
          "bucket_end": "2026-06-01T12:05:00Z",
          "sample_count": 3,
          "value": 10.0,
          "last": 5.0,
          "min": 2.0,
          "max": 5.0,
          "average": 3.3333333333333335,
          "sum": 10.0,
          "rate_per_second": 0.03333333333333333,
          "trace_exemplars": ["aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"]
        },
        {
          "bucket_start": "2026-06-01T12:10:00Z",
          "bucket_end": "2026-06-01T12:15:00Z",
          "sample_count": 2,
          "value": 5.0,
          "last": 4.0,
          "min": 1.0,
          "max": 4.0,
          "average": 2.5,
          "sum": 5.0,
          "rate_per_second": 0.016666666666666666,
          "trace_exemplars": []
        }
      ]
    }
  ],
  "next_action": {
    "code": "inspect_metric_change",
    "target": "trace_summary",
    "reason": "Open a trace exemplar from an unusual bucket to connect the metric change to spans, errors, logs, and release context."
  }
}