> ## Documentation Index > Fetch the complete documentation index at: https://docs.fitsociety.io/llms.txt > Use this file to discover all available pages before exploring further. # Get a client ## OpenAPI ````yaml /openapi/public-v1.json get /public/v1/clients/{clientId} openapi: 3.1.0 info: title: FITsociety Public API v1 version: 1.0.0 description: >- Developer Public API endpoints under `/public/v1`. This reference is filtered to OAuth/Bearer Public API resources and excludes provider callback receivers, storefront routes, public widgets, wishlist routes, and access-device validation endpoints. contact: name: FITsociety Engineering servers: - url: https://api.fitsociety.io description: Production security: [] tags: - name: OAuth description: Public API OAuth endpoints for server-to-server client credentials. - name: Health description: Public API token health checks. - name: Platform description: >- Inspect Public API client context, capabilities, scopes, and redacted audit logs. - name: Company Catalog description: Read and manage company profile metadata and locations. - name: Clients description: >- Create and manage clients through the Public API using Bearer access tokens. - name: Coaches description: Retrieve coaches for the authenticated company via integrations. - name: Calendar Events description: Read Public API calendar events. - name: Calendar Templates description: >- Read and manage event types and event templates used by calendar availability and bookings. - name: Calendar Extensions description: >- Read recurring bookings, booking requests, calendar tasks, and availability closure metadata. - name: Availability description: Read bookable availability slots and signed availability tokens. - name: Availability Management description: >- Manage coach and location availability templates used to derive bookable slots. - name: Bookings description: Read and manage Public API bookings. - name: Finance description: >- Read invoices, payments, products, subscriptions, memberships, and credits with guarded finance writes. - name: Webhooks description: >- Manage outbound webhook subscriptions and inspect delivery attempts through Public API Bearer endpoints. - name: Measurements description: Read and write client measurement entries. - name: Progress Photos description: Read client progress photo metadata and short-lived signed media URLs. - name: Forms description: Read form metadata and submissions, and assign forms. - name: Documents description: Read document and folder metadata only. - name: Habits description: Read habits and habit entries. - name: Goals description: Read client goal summaries. - name: Messaging description: Read client chat and message metadata. - name: Reports description: Read aggregate attendance, revenue, and retention summaries. paths: /public/v1/clients/{clientId}: get: tags: - Clients summary: Get a client operationId: getPublicV1ClientsByClientId parameters: - name: clientId in: path required: true schema: type: string responses: '200': description: Client fetched content: application/json: schema: allOf: - $ref: '#/components/schemas/PublicApiSuccessResponse' - type: object properties: data: type: object properties: client: $ref: '#/components/schemas/ClientDetail' examples: success: summary: Successful response value: data: client: clientId: 66f7b8b1e13c8d25f4d3d90c firstName: Jane lastName: Doe email: jane@example.com emailIsPlaceholder: false relationship: startedAt: '2026-07-14T10:00:00.000Z' assignedCoach: coachId: 66f7b8b1e13c8d25f4d3d90a name: John Doe phoneNumber: '+31612345678' gender: Female dateOfBirth: '1990-01-01T00:00:00.000Z' language: nl lastActiveAt: '2026-07-14T10:00:00.000Z' createdAt: '2026-07-14T10:00:00.000Z' location: addressLine1: Main street 1 addressLine2: Apt 2 zipCode: 1011AB city: Amsterdam country: Netherlands height: '172' timeZone: Europe/Amsterdam profession: Designer companyName: Acme customFields: - key: shirt_size label: en: string nl: string type: text value: string updatedAt: '2026-07-14T10:00:00.000Z' meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 '400': description: >- Bad request. The request shape, query, path parameter, or idempotency header is invalid. content: application/json: schema: $ref: '#/components/schemas/PublicApiError' examples: invalidRequest: summary: Invalid request value: error: code: 400 key: request.invalid message: The request is invalid. meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 '401': description: >- Unauthorized. The Bearer token is missing, invalid, expired, or belongs to an inactive Public API client. content: application/json: schema: $ref: '#/components/schemas/PublicApiError' examples: missingBearer: summary: Missing Bearer token value: error: code: 401 key: auth.missing_bearer message: Authorization Bearer token is required. meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 invalidToken: summary: Invalid or expired token value: error: code: 401 key: auth.invalid_token message: The access token is invalid or expired. meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 invalidClient: summary: Inactive or revoked client value: error: code: 401 key: auth.invalid_client message: The Public API client is inactive or revoked. meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 '403': description: >- Forbidden. The token is valid but does not include the required scope. content: application/json: schema: $ref: '#/components/schemas/PublicApiError' examples: insufficientScopes: summary: Missing required scope value: error: code: 403 key: scopes.insufficient message: The access token does not include the required scope. details: requiredScopes: - required:scope meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 '404': description: Client not found content: application/json: schema: $ref: '#/components/schemas/PublicApiError' examples: notFound: summary: Resource not found value: error: code: 404 key: resource.not_found message: The requested Public API resource was not found. meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 '429': description: >- Too many requests. The Public API client or caller IP exceeded the rate limit. content: application/json: schema: $ref: '#/components/schemas/PublicApiError' examples: rateLimitExceeded: summary: Rate limit exceeded value: error: code: 429 key: rate_limit.exceeded message: Too many Public API requests. Retry later. meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 0 resetSeconds: 1 retryAfterSeconds: 1 '500': description: >- Server error. The request could not be completed because of an unexpected Public API server failure. content: application/json: schema: $ref: '#/components/schemas/PublicApiError' examples: serverInternalError: summary: Unexpected server error value: error: code: 500 key: server.internal_error message: An unexpected Public API server error occurred. meta: requestId: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: limit: 10 remaining: 9 resetSeconds: 1 security: - PublicBearerAuth: [] x-codeSamples: - lang: bash label: cURL source: |- curl -H "Authorization: Bearer " \ https://api.fitsociety.io/public/v1/clients/ components: schemas: PublicApiSuccessResponse: type: object additionalProperties: false required: - data - meta properties: data: type: object meta: $ref: '#/components/schemas/PublicApiMeta' ClientDetail: allOf: - $ref: '#/components/schemas/ClientSummary' - type: object properties: phoneNumber: type: string example: '+31612345678' gender: type: string example: Female dateOfBirth: type: - string - 'null' format: date-time example: '1990-01-01T00:00:00.000Z' language: type: string example: nl lastActiveAt: type: - string - 'null' format: date-time createdAt: type: - string - 'null' format: date-time relationship: type: object properties: startedAt: type: - string - 'null' format: date-time assignedCoach: type: - object - 'null' properties: coachId: type: string example: 66f7b8b1e13c8d25f4d3d90a name: type: string example: John Doe location: type: object properties: addressLine1: type: string example: Main street 1 addressLine2: type: string example: Apt 2 zipCode: type: string example: 1011AB city: type: string example: Amsterdam country: type: string example: Netherlands height: type: string example: '172' timeZone: type: string example: Europe/Amsterdam profession: type: string example: Designer companyName: type: string example: Acme customFields: type: array items: $ref: '#/components/schemas/ClientCustomFieldValue' PublicApiError: type: object additionalProperties: false required: - error - meta properties: error: type: object additionalProperties: false required: - code - key - message properties: code: type: integer example: 401 key: type: string example: auth.invalid_token message: type: string example: The access token is invalid. details: type: object additionalProperties: true meta: $ref: '#/components/schemas/PublicApiMeta' PublicApiMeta: type: object additionalProperties: false required: - requestId properties: requestId: type: string description: Stable request correlation id. Mirrors `X-Request-Id` when supplied. example: 4f849d7d-f4f1-45cc-b4b7-3984a3d17f83 rateLimit: $ref: '#/components/schemas/PublicApiRateLimitMeta' ClientSummary: type: object properties: clientId: type: string example: 66f7b8b1e13c8d25f4d3d90c firstName: type: string example: Jane lastName: type: string example: Doe email: type: string format: email example: jane@example.com emailIsPlaceholder: type: boolean example: false relationship: type: object properties: status: type: string example: active memberStatus: type: string example: active portalAccessStatus: type: string example: enabled assignedCoach: type: - object - 'null' properties: name: type: string example: John Doe ClientCustomFieldValue: type: object properties: key: type: string example: shirt_size label: $ref: '#/components/schemas/LocalizedText' type: type: string example: text value: oneOf: - type: string - type: number - type: boolean - type: 'null' updatedAt: type: - string - 'null' format: date-time PublicApiRateLimitMeta: type: object additionalProperties: false properties: limit: type: integer example: 10 remaining: type: integer example: 9 resetSeconds: type: integer description: Seconds until the current rate limit window resets. example: 1 retryAfterSeconds: type: integer description: Present when the request was rate limited. example: 1 LocalizedText: type: object properties: en: type: string nl: type: string securitySchemes: PublicBearerAuth: type: http scheme: bearer bearerFormat: Opaque description: >- Public API access token issued by `/public/v1/oauth/token`. Example: `Authorization: Bearer fspt_...`. ````