Authenticate session

Request

Authenticates an existing session in order to obtain an access token without explicit user interaction. This enables silent authentication and single sign-on (SSO).

Security

ClientAccessToken

Bodyapplication/jsonrequired

resourcestring

Resource URI the authentication request is attempting to access, which is reflected in the audience (aud claim) of the access token. This must be configured as resource for the application.

claimsobject

Used to request additional claims in the ID token, such as roles, permissions, and other user profile data. The structure is per the OIDC Standard. For supported claims and how to request custom claims, see the ID Token Reference.

Example:

{
  "id_token": {
    "roles": null
  }
}

org_idstring

Organization ID, used for member login in B2B scenarios

client_attributesobject

Client attributes

device_idstring, <= 80 characters

Identifier of the device from which the authentication request originates

session_idstringrequired

Authentication session ID returned by other backend methods.

curl -i -X POST \
  https://api.sbx.transmitsecurity.io/cis/v1/auth/session/authenticate \
  -H 'Authorization: Bearer <YOUR_TOKEN_HERE>' \
  -H 'Content-Type: application/json' \
  -d '{
    "resource": "string",
    "claims": {
      "id_token": {
        "roles": null
      }
    },
    "org_id": "string",
    "client_attributes": {
      "user_agent": "string",
      "ip_address": "string"
    },
    "device_id": "string",
    "session_id": "string"
  }'

Responses

Returns user tokens

Bodyapplication/json

access_tokenstringrequired

User access token for accessing endpoints on behalf of the authenticated user.

id_tokenstring

ID token that identifies the user.

refresh_tokenstring

Refresh token used to refresh an expired access token.

token_typestringrequired

Bearer.

expires_innumberrequired

Expiration time of the access token in seconds.

Default:3600

session_idstringrequired

ID of the session in which the authentication occurs.

signing_artifactsApiPasskeySigningArtifactsDto (object) or ApiCryptoKeySigningArtifactsDto (object)

One of:

Cryptographic data required to independently verify a transaction approval outside Mosaic. Returned when approval_data is provided for a supported transaction-signing flow; fields vary by authenticator.

Response

{
  "access_token": "string",
  "id_token": "string",
  "refresh_token": "string",
  "token_type": "string",
  "expires_in": 3600,
  "session_id": "string",
  "signing_artifacts": {
    "approval_data": { … },
    "public_key": "string",
    "signature": "string",
    "credential_id": "string",
    "webauthn_session_id": "string",
    "authenticator_data": "string",
    "client_data_json": "string",
    "raw_challenge": "string"
  }
}