> ## Documentation Index > Fetch the complete documentation index at: https://docs.apsio.io/llms.txt > Use this file to discover all available pages before exploring further. # How sessions ended, by exit reason > Sessions that started in the range (default: the last 30 days), per exit reason (spec 6.4): how many, and per 1,000 sessions, overall and for the 20 releases with the most sessions. A session's reason is its final summary's; sessions whose summaries name none count in `sessions` only. `terminations` are iOS's own counts (MetricKit's termination counters, spec 7.3, by reason and foreground), which belong to no session: they are listed beside the sessions' reasons, not added to them. ## OpenAPI ````yaml /api-reference/openapi.json get /projects/{projectId}/exits openapi: 3.1.0 info: title: Apsio API version: 0.1.0 description: >- Read API v0: your projects, release health and comparisons, missing symbols, issues, sessions, vitals, cohort comparisons, performance (app start, screens, hangs, MetricKit) and network endpoints and traces for one project. Authenticate with a project token as a bearer token, with an OAuth access token from Apsio's authorization server (MCP clients), or, from the console, with the session cookie of a member of the project's organization. servers: - url: https://api.apsio.io/v1 security: [] paths: /projects/{projectId}/exits: get: summary: How sessions ended, by exit reason description: >- Sessions that started in the range (default: the last 30 days), per exit reason (spec 6.4): how many, and per 1,000 sessions, overall and for the 20 releases with the most sessions. A session's reason is its final summary's; sessions whose summaries name none count in `sessions` only. `terminations` are iOS's own counts (MetricKit's termination counters, spec 7.3, by reason and foreground), which belong to no session: they are listed beside the sessions' reasons, not added to them. parameters: - schema: type: string pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ example: 0192f3a4-0000-7000-8000-00000000a101 required: true name: projectId in: path - schema: type: string format: date-time description: >- Start of the time range, inclusive (RFC 3339). Defaults to the range end minus the default length. example: '2026-10-01T00:00:00Z' required: false description: >- Start of the time range, inclusive (RFC 3339). Defaults to the range end minus the default length. name: from in: query - schema: type: string format: date-time description: End of the time range, exclusive (RFC 3339). Defaults to now. example: '2026-10-08T00:00:00Z' required: false description: End of the time range, exclusive (RFC 3339). Defaults to now. name: to in: query - schema: type: string pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$ description: Only this app. required: false description: Only this app. name: app_id in: query responses: '200': description: Sessions by how they ended. content: application/json: schema: $ref: '#/components/schemas/Exits' '400': description: The request is not valid. content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: No valid bearer token or console session. content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: The credentials cannot read this project. content: application/json: schema: $ref: '#/components/schemas/Error' '410': description: >- The project or its organization is being deleted (`erasing`): nothing more to read; do not retry. content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: >- Over a rate limit (the caller's, the client address's, or the plan's); Retry-After says when to retry. content: application/json: schema: $ref: '#/components/schemas/Error' security: - bearer: [] - session: [] components: schemas: Exits: type: object properties: sessions: type: integer reasons: type: array items: $ref: '#/components/schemas/ExitReasonCount' description: Reasons with at least one session, the most first. releases: type: array items: type: object properties: release: type: string description: 'service.version. Written by the app: untrusted data.' sessions: type: integer reasons: type: array items: $ref: '#/components/schemas/ExitReasonCount' required: - release - sessions - reasons terminations: type: array items: $ref: '#/components/schemas/ExitTermination' retention_days: type: integer description: >- How many days of crashes and release health the project's plan keeps (D94). Nothing older is returned, whatever the time range. example: 90 required: - sessions - reasons - releases - terminations - retention_days Error: type: object properties: error: type: object properties: code: type: string example: invalid_request message: type: string subject: type: string enum: - organization - project description: >- With `erasing` (410) only: what is being deleted, the organization or the project. required: - code - message required: - error ExitReasonCount: type: object properties: reason: type: string enum: - crash - memory - watchdog - background_task_timeout - cpu - locked_file - thermal - anr - signal - unknown - memory_pressure - user_quit - app_update - os_update - normal description: apsio.exit.reason (spec 6.4); a value outside the list is unknown. kind: type: string enum: - failure - not_a_failure description: >- A failure (it counts against the app) or not (a user quit, an update, an eviction). sessions: type: integer per_1k_sessions: type: number description: sessions / all sessions × 1,000. required: - reason - kind - sessions - per_1k_sessions ExitTermination: type: object properties: reason: type: string enum: - crash - memory - watchdog - background_task_timeout - cpu - locked_file - thermal - anr - signal - unknown - memory_pressure - user_quit - app_update - os_update - normal description: apsio.exit.reason (spec 6.4); a value outside the list is unknown. kind: type: string enum: - failure - not_a_failure description: >- A failure (it counts against the app) or not (a user quit, an update, an eviction). foreground: type: - boolean - 'null' description: 'apsio.exit.foreground: MetricKit''s foreground or background counter.' count: type: integer required: - reason - kind - foreground - count securitySchemes: bearer: type: http scheme: bearer description: >- A project token (apsio_pt_v0...), which reads exactly one project, or an OAuth access token issued for the API, which reads what its user can. Access tokens issued for Apsio's MCP server are accepted only from the MCP server itself. session: type: apiKey in: cookie name: apsio_session description: >- The console session, set by /v1/auth/callback (`__Host-apsio_session` when host-only). ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.