Sign in

Request bodySignInRequest

• usernamestringRequired
  The account's email (a customer user provisioned with a plain username signs in with it too)
• passwordstring · passwordRequired
• siteIdstringOptional
  Customer users only, and only after a 202 SITE_CHOICE: the site to sign in to.Show more

  Customer users only, and only after a 202 SITE_CHOICE: the site to sign in to. Omitted, a customer user with one site signs in to it. Ignored for staff and supplier users.

Responses

• 200Signed in — the session of the realm named in `realm`SignInResult
• 202The password was accepted; one more step — MFA or a site choiceSignInNextStep
• 400VALIDATION or UNKNOWN_DOMAINApiErrorResponse
• 401
  UNAUTHENTICATED — missing or expired token.Show more

  UNAUTHENTICATED — missing or expired token. Declared on every operation because `security` is declared globally at the document root: every route is authenticated, so every route can answer 401.
  ApiErrorResponse
• 405
  VALIDATION — the public edge serves GET, POST, PUT, PATCH and DELETE only; any other method is refused before the platform sees it (details.reason METHOD_NOT_ALLOWED, details.source edge).Show more

  VALIDATION — the public edge serves GET, POST, PUT, PATCH and DELETE only; any other method is refused before the platform sees it (details.reason METHOD_NOT_ALLOWED, details.source edge). Not retryable as sent.
  ApiErrorResponse
• 413
  VALIDATION — the request body is larger than the surface's limit.Show more

  VALIDATION — the request body is larger than the surface's limit. Not retryable as sent: shrink the body. Declared on every operation that takes a request body. details carries exactly one key, maxBodyBytes (integer): the limit that applies to this surface, in bytes.
  ApiErrorResponse
• 414
  VALIDATION — the request URI (path and query string) is longer than 8 KiB; the public edge refuses it before the platform sees it (details.reason URI_TOO_LONG, details.source edge).Show more

  VALIDATION — the request URI (path and query string) is longer than 8 KiB; the public edge refuses it before the platform sees it (details.reason URI_TOO_LONG, details.source edge). Not retryable as sent: send long input in the body of a POST.
  ApiErrorResponse
• 415
  VALIDATION — a request body that is not JSON (application/json or application/*+json; a form body only on the OAuth token routes).Show more

  VALIDATION — a request body that is not JSON (application/json or application/*+json; a form body only on the OAuth token routes). The public edge refuses it before the platform sees it (details.reason UNSUPPORTED_MEDIA_TYPE, details.source edge). Not retryable as sent: send Content-Type application/json. Declared on every operation that takes a JSON request body.
  ApiErrorResponse
• 429
  Counted in fixed windows (default 15 min).Show more

  Counted in fixed windows (default 15 min). The signup, login, password and invite routes count every attempt per client address AND per subject (the email, the username + site, or the invite token). POST /v1/oauth/token is counted three ways, none of them on client_id alone, so knowing a client_id (which is not secret) never lets anyone spend its holder's budget: oauth-token counts every attempt per client address only; oauth-token-failure counts FAILED client authentications per client address and per (client address, client_id) pair; oauth-token-issued counts tokens issued per client_id only, and only a request whose secret, grant_type and scope all passed can spend it. details.reason says which limit tripped (CLIENT_RATE_LIMITED | SUBJECT_RATE_LIMITED) and details.action which count (signup | signup-verify | login | password-forgot | password-reset | invite-accept | oauth-token | oauth-token-failure | oauth-token-issued). Retry-After is whole seconds to the end of the window, and details.retryAfterMs mirrors it. The answer is the same whether or not the account or key exists, so the limit cannot be used to enumerate accounts, and nothing the caller sent is echoed. adds three counts per client address for the MCP grant routes: oauth-authorize (GET /v1/oauth/authorize, which may fetch a Client ID Metadata Document), oauth-register (POST /v1/oauth/register) and oauth-device (POST /v1/oauth/device_authorization), and one count per MCP grant, oauth-exchange-grant (the token exchange of POST /v1/oauth/token, counted per grant after the exchange client and the subject token verified, default 120 a minute), whose details.reason is EXCHANGE_RATE_LIMITED.
  ApiErrorResponse
• 500INTERNAL — a bug, and traceId is the support handle.ApiErrorResponse

Errors you should handle

Branch on code and honour retryable — never on the HTTP status alone.