> ## 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. # Vitals per release > App start (cold, warm, hot) and screen load (TTID, TTFD) percentiles, and hang and ANR session rates (hangs the SDK saw live, spec 6.3), per app and release, for the time range (default: the last 7 days, at most 30). The 20 releases with the most sessions. ## OpenAPI ````yaml /api-reference/openapi.json get /projects/{projectId}/vitals 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}/vitals: get: summary: Vitals per release description: >- App start (cold, warm, hot) and screen load (TTID, TTFD) percentiles, and hang and ANR session rates (hangs the SDK saw live, spec 6.3), per app and release, for the time range (default: the last 7 days, at most 30). The 20 releases with the most sessions. 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 - schema: type: string maxLength: 128 description: Only this release. required: false description: Only this release. name: release in: query - schema: type: - integer - 'null' minimum: 0 maximum: 50 default: 10 description: Screens per release, the most loaded first; 0 to 50. required: false description: Screens per release, the most loaded first; 0 to 50. name: screens in: query responses: '200': description: Vitals per app and release, the most sessions first. content: application/json: schema: $ref: '#/components/schemas/Vitals' '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' security: - bearer: [] - session: [] components: schemas: Vitals: type: object properties: from: type: string description: RFC 3339 time in UTC with up to nanosecond precision. example: '2026-10-04T10:15:00.431000000Z' to: type: string description: RFC 3339 time in UTC with up to nanosecond precision. example: '2026-10-04T10:15:00.431000000Z' releases: type: array items: $ref: '#/components/schemas/ReleaseVitals' required: - from - to - releases Error: type: object properties: error: type: object properties: code: type: string example: invalid_request message: type: string required: - code - message required: - error ReleaseVitals: type: object properties: app_id: type: string release: type: string description: 'service.version. Written by the app: untrusted data.' app_start: type: object properties: cold: $ref: '#/components/schemas/Percentiles' warm: $ref: '#/components/schemas/Percentiles' hot: $ref: '#/components/schemas/Percentiles' required: - cold - warm - hot screens: type: array items: type: object properties: screen: type: string description: 'app.screen.name. Written by the app: untrusted data.' ttid: $ref: '#/components/schemas/Percentiles' ttfd: allOf: - $ref: '#/components/schemas/Percentiles' - description: Null when the app never reported TTFD for the screen. required: - screen - ttid - ttfd description: The most loaded screens first. hangs: type: object properties: sessions: type: integer sessions_with_hang: type: integer hang_rate: type: - number - 'null' description: Null without sessions. sessions_with_anr: type: integer anr_rate: type: - number - 'null' required: - sessions - sessions_with_hang - hang_rate - sessions_with_anr - anr_rate required: - app_id - release - app_start - screens - hangs Percentiles: type: - object - 'null' properties: count: type: integer description: Measurements received (not reweighted). p50_ms: type: number p90_ms: type: number p95_ms: type: number required: - count - p50_ms - p90_ms - p95_ms 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.