> ## Documentation Index
> Fetch the complete documentation index at: https://ajuda.memberkit.com.br/llms.txt
> Use this file to discover all available pages before exploring further.

# Troca um token de login por um token de acesso

> Troca um token de login por um token de acesso.

Faz o login único (SSO) e o login pelos links dos e-mails. O token de login vale por 24 horas e vem da [API de operador](https://ajuda.memberkit.com.br/referencia-api/post-tokens.md) ou da variável `{{ user.authentication_token }}` dos [templates de e-mail](https://ajuda.memberkit.com.br/headless/emails-para-seu-frontend.md).

Como todo login, encerra a sessão anterior do membro.


## OpenAPI

````yaml headless/openapi.yml POST /api/headless/v1/auth/exchange
openapi: 3.1.0
info:
  title: MemberKit Headless
  version: 1.0.0
servers: []
security:
  - bearer: []
    headlessKey: []
tags:
  - name: academy
  - name: auth
  - name: onboarding
  - name: courses
  - name: categories
  - name: banners
  - name: bookmarks
  - name: kv
  - name: comments
  - name: quizzes
  - name: search
  - name: ranking
  - name: profile
  - name: certificates
  - name: contact_messages
  - name: notifications
  - name: uploads
  - name: assistant
  - name: community
  - name: lessons
paths:
  /api/headless/v1/auth/exchange:
    post:
      tags:
        - auth
      summary: Troca um token de login por um token de acesso
      description: Troca um token de login por um token de acesso.
      operationId: exchangeSignInToken
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - token
              properties:
                token:
                  type: string
      responses:
        '200':
          description: Token emitido
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccessToken'
        '401':
          description: >-
            Token de login inválido ou expirado (code invalid_token) ou chave
            headless inválida (code invalid_headless_key)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '402':
          $ref: '#/components/responses/SubscriptionSuspended'
        '403':
          description: Conta bloqueada (code account_locked)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          $ref: '#/components/responses/InvalidParameters'
        '429':
          $ref: '#/components/responses/RateLimited'
      security:
        - headlessKey: []
components:
  schemas:
    AccessToken:
      type: object
      required:
        - access_token
      properties:
        access_token:
          type: string
          description: JWT enviado no cabeçalho Authorization das demais requisições.
    Error:
      type: object
      description: Formato de todos os erros.
      required:
        - code
        - message
        - request_id
      properties:
        code:
          type: string
          description: Código do erro.
          enum:
            - subscription_suspended
            - onboarding_required
            - course_onboarding_required
            - access_expired
            - content_locked
            - comments_disabled
            - unprocessable_certificate
            - unauthenticated
            - invalid_credentials
            - invalid_token
            - invalid_headless_key
            - session_replaced
            - session_revoked
            - account_locked
            - forbidden
            - not_found
            - missing_parameter
            - malformed_request
            - validation_failed
            - invalid_signed_id
            - rate_limited
            - idempotency_key_reused
            - request_in_progress
            - assistant_unavailable
            - quiz_required
        message:
          type: string
        request_id:
          type: string
        errors:
          type: object
          description: Erros de cada campo, presentes com o código validation_failed.
          additionalProperties:
            type: array
            items:
              type: object
              required:
                - code
                - message
              properties:
                code:
                  type: string
                  description: Motivo do erro, como blank, taken, too_short ou invalid.
                message:
                  type: string
                  description: Mensagem pronta para exibir, no idioma da área de membros.
  responses:
    SubscriptionSuspended:
      description: Assinatura da área de membros suspensa (code subscription_suspended).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    InvalidParameters:
      description: >-
        Parâmetros inválidos (code validation_failed, invalid_signed_id,
        missing_parameter ou idempotency_key_reused).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    RateLimited:
      description: Limite de requisições atingido (code rate_limited).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    bearer:
      type: http
      scheme: bearer
      bearerFormat: JWT
    headlessKey:
      type: apiKey
      in: header
      name: X-Memberkit-Headless-Key
      description: >-
        Chave headless da área de membros, em Configurações. É pública e vai em
        todas as requisições, inclusive nas que levam o token do membro.

````

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