> ## Documentation Index
> Fetch the complete documentation index at: https://docs.peridot.id/llms.txt
> Use this file to discover all available pages before exploring further.

# Exchange a one-time SSO code for the identity

> Consumes a `pid_code` issued by a Google or passkey login with `returnTo`
(optionally bound to a `clientId`) and returns the PeridotID identity.
Codes are single-use and expire after ~5 minutes. Call server-to-server;
when the code is bound to an app, the same `clientId` must be presented.




## OpenAPI

````yaml /openapi.yaml post /auth/exchange
openapi: 3.0.3
info:
  title: PeridotID API
  version: 0.1.0
  description: >
    Gaming Identity Platform — Authentication, Identity, and Profile for the
    Peridot ecosystem.


    ## Base URL

    All endpoints are prefixed with `/v1`.


    | Environment | Base URL |

    |---|---|

    | Production | `https://api.pid.peridotvault.com/v1` |

    | Local dev | `http://localhost:3300/v1` |


    ## Authentication

    Authentication is **cookie-based**. After a successful Google sign-in the
    API sets two

    `HttpOnly` cookies:


    - `pid_access` — short-lived JWT access token (15 min), sent on every
    request.

    - `pid_refresh` — long-lived rotating refresh token (30 days), only sent to
    `/v1/auth`.


    Browsers handle these automatically; non-browser clients must send

    `Cookie: pid_access=<token>` on each request and call `/v1/auth/refresh`
    before the

    access token expires.
  contact:
    name: PeridotID
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
servers:
  - url: https://api.pid.peridotvault.com/v1
    description: Production
  - url: http://localhost:3300/v1
    description: Local development
security: []
tags:
  - name: auth
    description: Login, logout, token refresh, and machine (client-credentials) tokens
  - name: identity
    description: The user's identity across products
  - name: profile
    description: The user's public profile
  - name: wallet
    description: >
      The user's wallet, associated with their PID. **Deprecated (V3 surface)**
      — preserved

      for existing clients, backed by `linked_address` chain accounts. Use
      `/account` and

      the smart account instead.
  - name: account
    description: >-
      PeridotID account — owns chain accounts (smart account PDA, legacy linked
      address)
  - name: fiat
    description: |
      The internal IDR fiat ledger: balances, statements, sends, and money-in.
      Top-ups enter through a hosted DOKU Checkout page (no Sub-Account) and
      credit the internal ledger once the payment is corroborated. Any identity
      can send to any identity (escrow/payouts). Fees: global 0.1% (min Rp100,
      no cap) plus optional per-app fees that stack and credit the app. Bank
      withdrawals (redemption) are disabled for now.
  - name: apps
    description: |
      Third-party apps ("Sign in with PeridotID"): client_id, allowed origins,
      optional backend secret, ledger callbacks (deferred), and a per-app fee
      schedule. Owner-scoped — a non-owner gets 404. App backends authenticate
      server-side with `POST /v1/auth/token` (client credentials).
  - name: credentials
    description: >
      Signing authorities (secp256r1 passkeys). Google OAuth proves identity; a

      passkey authorizes the wallet. The first credential registers freely; each
      additional

      credential requires approval by an existing credential
      (existing-credential approval rule).
  - name: permissions
    description: >
      EVM permission grants (scoped P-256 session keys, WHITEPAPER.md §10).
      Validation is pure

      hygiene + canonical id/challenge computation; submission-time account
      binding

      is enforced by the relay path.
  - name: session-keys
    description: >
      SVM gameplay sessions (Ed25519 session keys in isolated PDAs,
      WHITEPAPER.md §11).

      Validation is pure hygiene + canonical address/challenge computation;

      submission-time vault binding is enforced by the relay path.
  - name: openapi
    description: Machine-readable API specification
paths:
  /auth/exchange:
    post:
      tags:
        - auth
      summary: Exchange a one-time SSO code for the identity
      description: >
        Consumes a `pid_code` issued by a Google or passkey login with
        `returnTo`

        (optionally bound to a `clientId`) and returns the PeridotID identity.

        Codes are single-use and expire after ~5 minutes. Call server-to-server;

        when the code is bound to an app, the same `clientId` must be presented.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - code
              properties:
                code:
                  type: string
                  description: One-time pid_code from the redirect URL
                clientId:
                  type: string
                  description: Must match the client_id the code was issued for
                clientSecret:
                  type: string
                  description: >-
                    Required only when the bound app has a secret set
                    (backend-only, never ship in frontend code)
            example:
              code: mF8xQ2vT9nR4kL7pZ3wX6yA1bD5eF0gH
              clientId: pidapp_0123456789abcdef0123456789abcdef
      responses:
        '200':
          description: The PeridotID identity behind the code
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExchangeResult'
        '400':
          $ref: '#/components/responses/BadRequest'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  schemas:
    ExchangeResult:
      type: object
      required:
        - pid
        - identityId
        - profile
        - credentials
      properties:
        pid:
          type: string
          pattern: ^[a-z0-9_]{3,20}@pid$
          description: Permanent PID of the signed-in user (treat as opaque)
          example: ifal@pid
        identityId:
          type: string
          deprecated: true
          description: Shim — identical to pid, removed next release
          example: ifal@pid
        profile:
          type: object
          properties:
            displayName:
              type: string
              nullable: true
            avatarUrl:
              type: string
              nullable: true
        credentials:
          type: array
          items:
            type: object
            properties:
              provider:
                type: string
              email:
                type: string
                nullable: true
    ApiError:
      type: object
      required:
        - statusCode
        - message
      properties:
        statusCode:
          type: integer
        message:
          oneOf:
            - type: string
            - type: array
              items:
                type: string
  responses:
    BadRequest:
      description: Validation error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
          example:
            statusCode: 400
            message:
              - >-
                handle must be 3-20 chars: lowercase letters, numbers,
                underscore
    RateLimited:
      description: Too many requests
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
          example:
            statusCode: 429
            message: 'ThrottlerException: Too Many Requests'

````

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