--- title: "Associate a person with a firm" url: "https://developer-staging.agentsync.io/apis/identity/versions/1ed33a2c-924a-434c-9643-fbc531dea1b8/operations/associatePersonWithFirmV2" --- > Full API specification: https://developer-staging.agentsync.io/apis/identity/versions/1ed33a2c-924a-434c-9643-fbc531dea1b8.md # Associate a person with a firm `POST` `/v2/persons/{personId}/firms` Operation ID: `associatePersonWithFirmV2` Associates an existing person with an existing firm. This is a distinct operation from creating either resource — it only links a person to a firm the caller already owns. Both the person and the firm must be visible to the authenticated customer; if either is unknown or belongs to another customer the response is 404 (never 403), so resource existence is not leaked across customer boundaries. When `role` is omitted, it defaults to `PRINCIPAL`. Re-associating the same person and firm is idempotent and returns 201 with the current association. ## Path parameters - `personId` (string, uuid, required) - ID of the person ## Request body (required) Content types: `application/json` ## Responses - `201` - Association created. - `400` - One or more request fields failed validation - `401` - No valid bearer token was presented - `403` - The token does not carry the required scope - `404` - The requested resource does not exist or is not visible to the caller - `429` - Rate limit exceeded. The caller has exceeded the maximum number of requests allowed per rate-limit window for the authenticated credential. NOTE: The response body for this status deviates from the standard V2 error shape ({message, details, code}). The body contains only a top-level "message" string. Clients should treat the Retry-After header as the authoritative retry signal and must not parse the message string. - `500` - An unexpected server error occurred ## OpenAPI definition ```yaml openapi: 3.0.1 info: title: Identity API version: v1.275.8 servers: - url: https://api.sandbox.agentsync.io/id description: Sandbox server - url: https://api.agentsync.io/id description: Production server paths: /v2/persons/{personId}/firms: post: summary: Associate a person with a firm description: > Associates an existing person with an existing firm. This is a distinct operation from creating either resource — it only links a person to a firm the caller already owns. Both the person and the firm must be visible to the authenticated customer; if either is unknown or belongs to another customer the response is 404 (never 403), so resource existence is not leaked across customer boundaries. When `role` is omitted, it defaults to `PRINCIPAL`. Re-associating the same person and firm is idempotent and returns 201 with the current association. operationId: associatePersonWithFirmV2 tags: - Persons security: - oauth2: - identity.profiles.write parameters: - $ref: "#/components/parameters/PersonIdParam" requestBody: required: true content: application/json: schema: $ref: "#/components/schemas/AssociateFirmRequestV2" responses: "201": description: Association created. headers: ratelimit-limit: $ref: "#/components/headers/ratelimit-limit" ratelimit-remaining: $ref: "#/components/headers/ratelimit-remaining" ratelimit-reset: $ref: "#/components/headers/ratelimit-reset" content: application/json: schema: $ref: "#/components/schemas/PersonFirmV2" "400": $ref: "#/components/responses/V2BadRequest" "401": $ref: "#/components/responses/V2Unauthorized" "403": $ref: "#/components/responses/V2Forbidden" "404": $ref: "#/components/responses/V2NotFound" "429": $ref: "#/components/responses/V2TooManyRequests" "500": $ref: "#/components/responses/V2InternalServerError" security: - oauth2: - identity.profiles.write components: parameters: PersonIdParam: name: personId in: path description: ID of the person required: true schema: type: string format: uuid schemas: AssociateFirmRequestV2: title: AssociateFirmRequestV2 description: Identifies the existing firm to associate with the person, and optionally the person's role in it. type: object required: - firmId properties: firmId: type: string format: uuid description: The unique identifier of the firm to associate. example: 550e8400-e29b-41d4-a716-446655440000 role: type: string enum: - PRINCIPAL - AGENT_FIRM_MANAGER - AGENT default: PRINCIPAL description: The person's role in the firm. Defaults to PRINCIPAL when omitted. example: PRINCIPAL PersonFirmV2: title: PersonFirmV2 description: An association between a person and a firm. type: object required: - personId - firmId - role properties: personId: type: string format: uuid description: The unique identifier of the associated person. readOnly: true example: 550e8400-e29b-41d4-a716-446655440000 firmId: type: string format: uuid description: The unique identifier of the associated firm. readOnly: true example: 660e8400-e29b-41d4-a716-446655440111 role: type: string enum: - PRINCIPAL - AGENT_FIRM_MANAGER - AGENT description: The person's role in the firm. example: PRINCIPAL V2Error: type: object required: - message - details - code properties: message: type: string description: Human-readable error summary. Do not parse — use "code" for branching. example: Validation failed details: type: array description: Per-field validation errors. Empty for all non-400 responses. items: $ref: "#/components/schemas/V2FieldError" code: type: string description: Stable machine-readable error code. enum: - validation_failed - unauthorized - unauthorized_scope - resource_not_found - conflict - unprocessable - unsupported_media_type - rate_limited - internal example: validation_failed V2FieldError: type: object required: - param - message properties: param: type: string description: The request field that failed validation example: email message: type: string description: Human-readable description of the failure example: must not be blank headers: ratelimit-limit: description: > Maximum number of requests allowed per rate-limit window for the authenticated credential. The value returned in this header is authoritative; do not cache it. schema: type: integer ratelimit-remaining: description: Number of requests remaining in the current rate-limit window. schema: type: integer ratelimit-reset: description: > Unix timestamp (seconds) after which at least one additional request slot becomes available. In a sliding window this is a hint, not a hard reset point — retrying exactly at this instant may still return 429 under sustained load. schema: type: integer Retry-After: description: > Minimum seconds to wait before retrying. Use this value directly as your retry delay; it already accounts for any server-side backoff. schema: type: integer responses: V2BadRequest: description: One or more request fields failed validation content: application/json: schema: $ref: "#/components/schemas/V2Error" example: message: Validation failed code: validation_failed details: - param: email message: must not be blank V2Unauthorized: description: No valid bearer token was presented content: application/json: schema: $ref: "#/components/schemas/V2Error" example: message: Authentication required code: unauthorized details: [] V2Forbidden: description: The token does not carry the required scope content: application/json: schema: $ref: "#/components/schemas/V2Error" example: message: Insufficient scope code: unauthorized_scope details: [] V2NotFound: description: The requested resource does not exist or is not visible to the caller content: application/json: schema: $ref: "#/components/schemas/V2Error" example: message: Resource not found code: resource_not_found details: [] V2TooManyRequests: description: > Rate limit exceeded. The caller has exceeded the maximum number of requests allowed per rate-limit window for the authenticated credential. NOTE: The response body for this status deviates from the standard V2 error shape ({message, details, code}). The body contains only a top-level "message" string. Clients should treat the Retry-After header as the authoritative retry signal and must not parse the message string. headers: ratelimit-limit: $ref: "#/components/headers/ratelimit-limit" ratelimit-remaining: $ref: "#/components/headers/ratelimit-remaining" ratelimit-reset: $ref: "#/components/headers/ratelimit-reset" Retry-After: $ref: "#/components/headers/Retry-After" content: application/json: schema: type: object required: - message properties: message: type: string example: message: API rate limit exceeded V2InternalServerError: description: An unexpected server error occurred content: application/json: schema: $ref: "#/components/schemas/V2Error" example: message: An unexpected error occurred code: internal details: [] securitySchemes: oauth2: type: oauth2 description: > OAuth2 client credentials. The `tokenUrl` below is the SANDBOX token endpoint; for production use `https://auth.agentsync.io/oauth2/token`. OpenAPI 3.0 permits only one token URL per flow, so both cannot be expressed here — see the Authentication section for the full environment table. flows: clientCredentials: tokenUrl: https://auth.sandbox.agentsync.io/oauth2/token scopes: identity.profiles.read: Read access to producer profile resources (V2 customer-facing) identity.profiles.write: Write access to producer profile resources (V2 customer-facing) ```