dialogbrain-com MCP OAUTH API

openapi: 3.2.0
info:
  title: DialogBrain v2 API Gateway MCP OAUTH API
  description: Clean refactored API gateway with minimal vertical slice
  version: 0.1.0
tags:
- name: mcp-oauth
paths:
  /.well-known/openai-apps-challenge:
    get:
      tags:
      - mcp-oauth
      summary: Openai Apps Challenge
      description: Domain ownership verification for ChatGPT Apps listing.
      operationId: openai_apps_challenge__well_known_openai_apps_challenge_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /.well-known/oauth-protected-resource:
    get:
      tags:
      - mcp-oauth
      summary: Oauth Protected Resource
      operationId: oauth_protected_resource__well_known_oauth_protected_resource_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /.well-known/oauth-protected-resource/{resource_path}:
    get:
      tags:
      - mcp-oauth
      summary: Oauth Protected Resource For Path
      description: 'RFC 9728 §3.1 path-inserted document: the resource is the URL the

        client is actually calling.


        A client checks the `resource` it gets back against the URL it connected

        to, byte for byte. Ours answered `/mcp/` to everyone, so a client that

        connected to `/mcp` — the form the landing page''s install button hands

        out — failed the check AFTER the person had already signed in and a key

        had been issued: "Protected resource .../mcp/ does not match expected

        .../mcp". Every attempt left another revoked key behind (12 of them on

        one account before this was traced, 2026-09-21).


        The path is read off the raw request rather than from a route parameter,

        because a parameter arrives already stripped of its trailing slash and

        the slash is the whole point: the two spellings are different resource

        identifiers to the client, and each has to be told its own.'
      operationId: oauth_protected_resource_for_path__well_known_oauth_protected_resource__resource_path__get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /.well-known/oauth-authorization-server:
    get:
      tags:
      - mcp-oauth
      summary: Oauth Authorization Server
      operationId: oauth_authorization_server__well_known_oauth_authorization_server_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /oauth/client-metadata.json:
    get:
      tags:
      - mcp-oauth
      summary: Oauth Client Metadata Document
      description: 'DialogBrain as an OAuth CLIENT: the client ID metadata document

        (draft-ietf-oauth-client-id-metadata-document) that a third-party

        authorization server fetches when a workspace connects its MCP server

        through Add Integration and our client_id is this document''s URL.

        Public and unauthenticated by design; the document carries no secret

        (public client, token_endpoint_auth_method "none"). Everything else in

        this module is DialogBrain as an authorization SERVER for MCP clients;

        the two are unrelated and share only the path prefix.'
      operationId: oauth_client_metadata_document_oauth_client_metadata_json_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /oauth/register:
    post:
      tags:
      - mcp-oauth
      summary: Oauth Register
      operationId: oauth_register_oauth_register_post
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /oauth/client/{client_id}:
    get:
      tags:
      - mcp-oauth
      summary: Oauth Client Info
      description: 'The name a registered client gave itself, for the consent screen.


        Without it the consent page guessed from the redirect host and called every

        app on localhost "Claude Code": Codex and Cursor connected under that name,

        and their keys were filed as "Claude Code MCP" in Settings → Developer.

        Only the declared name is returned — nothing that identifies the user.

        An unknown client (registered before this lived in Redis) is a 404 and the

        page falls back to a neutral label.'
      operationId: oauth_client_info_oauth_client__client_id__get
      parameters:
      - name: client_id
        in: path
        required: true
        schema:
          type: string
          title: Client Id
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /oauth/authorize:
    get:
      tags:
      - mcp-oauth
      summary: Oauth Authorize Get
      operationId: oauth_authorize_get_oauth_authorize_get
      parameters:
      - name: client_id
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: Client Id
      - name: redirect_uri
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: Redirect Uri
      - name: state
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: State
      - name: code_challenge
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: Code Challenge
      - name: code_challenge_method
        in: query
        required: false
        schema:
          type: string
          default: S256
          title: Code Challenge Method
      - name: response_type
        in: query
        required: false
        schema:
          type: string
          default: code
          title: Response Type
      - name: scope
        in: query
        required: false
        schema:
          type: string
          default: ''
          title: Scope
      responses:
        '200':
          description: Successful Response
          content:
            text/html:
              schema:
                type: string
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
    post:
      tags:
      - mcp-oauth
      summary: Oauth Authorize Post
      operationId: oauth_authorize_post_oauth_authorize_post
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/Body_oauth_authorize_post_oauth_authorize_post'
      responses:
        '200':
          description: Successful Response
          content:
            text/html:
              schema:
                type: string
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /oauth/authorize_direct:
    post:
      tags:
      - mcp-oauth
      summary: Oauth Authorize Direct
      description: 'Called by the frontend authorize page to complete OAuth without manual API key entry.


        The frontend creates an API key on behalf of the logged-in user, then calls this endpoint

        to generate an auth code and return the redirect URL.'
      operationId: oauth_authorize_direct_oauth_authorize_direct_post
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
  /oauth/token:
    post:
      tags:
      - mcp-oauth
      summary: Oauth Token
      operationId: oauth_token_oauth_token_post
      requestBody:
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/Body_oauth_token_oauth_token_post'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    Body_oauth_authorize_post_oauth_authorize_post:
      properties:
        api_key:
          type: string
          title: Api Key
        client_id:
          type: string
          title: Client Id
          default: ''
        redirect_uri:
          type: string
          title: Redirect Uri
          default: ''
        state:
          type: string
          title: State
          default: ''
        code_challenge:
          type: string
          title: Code Challenge
          default: ''
        code_challenge_method:
          type: string
          title: Code Challenge Method
          default: S256
      type: object
      required:
      - api_key
      title: Body_oauth_authorize_post_oauth_authorize_post
    Body_oauth_token_oauth_token_post:
      properties:
        grant_type:
          type: string
          title: Grant Type
        code:
          type: string
          title: Code
          default: ''
        redirect_uri:
          type: string
          title: Redirect Uri
          default: ''
        client_id:
          type: string
          title: Client Id
          default: ''
        code_verifier:
          type: string
          title: Code Verifier
          default: ''
        client_secret:
          type: string
          title: Client Secret
          default: ''
        refresh_token:
          type: string
          title: Refresh Token
          default: ''
      type: object
      required:
      - grant_type
      title: Body_oauth_token_oauth_token_post