LangChain

LangChain OAUTH API

The oauth API from LangChain — 7 operation(s) for oauth.

GitHub OpenAPI

Operations 7

GET /.well-known/oauth-authorization-server Get OAuth2 authorization server metadata #
GET /oauth/authorize Initiate OAuth2 authorization #
POST /oauth/authorize/approve Approve OAuth2 authorization request #
POST /oauth/device/authorize Authorize a device code #
POST /oauth/device/code Request OAuth2 device authorization #
POST /oauth/revoke Revoke an OAuth2 token #
POST /oauth/token Exchange grant for OAuth2 tokens #

Documentation

📖
Documentation
https://docs.langchain.com/langsmith
📖
Authentication
https://docs.langchain.com/langsmith/create-account-api-key

Specifications

⚙
OpenAPI
https://artifacts.apis.io/langchain/openapi/langchain-oauth-api-openapi.yml

Other Resources

🔗
Signup
https://smith.langchain.com/

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/langchain:langchain-oauth-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

langchain-oauth-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: LangSmith OAuth API
  description: 'The LangSmith API is used to programmatically create and manage LangSmith resources.


    ## Host

    https://api.smith.langchain.com


    ## Authentication

    To authenticate with the LangSmith API, set the `X-Api-Key` header

    to a valid LangSmith API key.'
  version: 0.1.0
servers:
- url: /
tags:
- name: OAuth
paths:
  /.well-known/oauth-authorization-server:
    get:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Returns OAuth2 authorization server metadata per RFC 8414, including supported endpoints, grant types, and response types.
      tags:
      - OAuth
      summary: Get OAuth2 authorization server metadata
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.AuthorizationServerMetadata'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
      parameters: []
      operationId: getWellKnownOauthAuthorizationServer
      x-operation-id-source: derived
  /oauth/authorize:
    get:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Validates authorization request parameters and redirects to the frontend consent page per RFC 6749.
      tags:
      - OAuth
      summary: Initiate OAuth2 authorization
      parameters:
      - description: Must be 'code'
        name: response_type
        in: query
        required: true
        schema:
          type: string
          title: Response Type
      - description: OAuth2 client ID
        name: client_id
        in: query
        required: true
        schema:
          type: string
          title: Client Id
      - description: Redirect URI registered with the client
        name: redirect_uri
        in: query
        required: true
        schema:
          type: string
          title: Redirect Uri
      - description: PKCE code challenge
        name: code_challenge
        in: query
        required: true
        schema:
          type: string
          title: Code Challenge
      - description: PKCE method, must be 'S256'
        name: code_challenge_method
        in: query
        required: true
        schema:
          type: string
          title: Code Challenge Method
      - description: Opaque state value to prevent CSRF
        name: state
        in: query
        schema:
          type: string
          title: State
      responses:
        '302':
          description: Found
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
      operationId: getOauthAuthorize
      x-operation-id-source: derived
  /oauth/authorize/approve:
    post:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Issues an authorization code after the authenticated user approves the request. Called by the frontend consent page. Requires authentication.
      tags:
      - OAuth
      summary: Approve OAuth2 authorization request
      parameters: []
      responses:
        '200':
          description: JSON body with redirect_uri the frontend should navigate the browser to
          content:
            application/json:
              schema:
                type: object
                additionalProperties:
                  type: string
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                organization_id:
                  type: string
                  description: Organization ID; must match the authenticated org
                client_id:
                  type: string
                  description: OAuth2 client ID
                redirect_uri:
                  type: string
                  description: Redirect URI registered with the client
                code_challenge:
                  type: string
                  description: PKCE code challenge
                code_challenge_method:
                  type: string
                  description: PKCE method, must be 'S256'
                state:
                  type: string
                  description: Opaque state value to prevent CSRF
              required:
              - organization_id
              - client_id
              - redirect_uri
              - code_challenge
              - code_challenge_method
      operationId: postOauthAuthorizeApprove
      x-operation-id-source: derived
  /oauth/device/authorize:
    post:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Marks a device code as authorized for the authenticated user. Called by the /activate page when the user enters their user code. Requires authentication.
      tags:
      - OAuth
      summary: Authorize a device code
      parameters: []
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                additionalProperties:
                  type: string
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                organization_id:
                  type: string
                  description: Organization ID; must match the authenticated org
                user_code:
                  type: string
                  description: User code displayed on the device
              required:
              - organization_id
              - user_code
      operationId: postOauthDeviceAuthorize
      x-operation-id-source: derived
  /oauth/device/code:
    post:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Issues a device code and user code for the device authorization flow per RFC 8628.
      tags:
      - OAuth
      summary: Request OAuth2 device authorization
      parameters: []
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.DeviceCodeResponse'
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                client_id:
                  type: string
                  description: OAuth2 client ID
              required:
              - client_id
      operationId: postOauthDeviceCode
      x-operation-id-source: derived
  /oauth/revoke:
    post:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Revokes an access token or refresh token per RFC 7009. Always returns 200 regardless of whether the token was found.
      tags:
      - OAuth
      summary: Revoke an OAuth2 token
      parameters: []
      responses:
        '200':
          description: OK
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                token:
                  type: string
                  description: Token to revoke (access token or refresh token)
              required:
              - token
      operationId: postOauthRevoke
      x-operation-id-source: derived
  /oauth/token:
    post:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: 'Token endpoint that dispatches by grant_type: authorization_code, urn:ietf:params:oauth:grant-type:device_code, or refresh_token.'
      tags:
      - OAuth
      summary: Exchange grant for OAuth2 tokens
      parameters: []
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenResponse'
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/oauth.TokenErrorResponse'
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                grant_type:
                  type: string
                  description: 'Grant type: authorization_code, urn:ietf:params:oauth:grant-type:device_code, or refresh_token'
                client_id:
                  type: string
                  description: OAuth2 client ID
                code:
                  type: string
                  description: Authorization code (authorization_code grant)
                code_verifier:
                  type: string
                  description: PKCE code verifier (authorization_code grant)
                redirect_uri:
                  type: string
                  description: Redirect URI (authorization_code grant)
                device_code:
                  type: string
                  description: Device code (device_code grant)
                refresh_token:
                  type: string
                  description: Refresh token (refresh_token grant)
              required:
              - grant_type
              - client_id
      operationId: postOauthToken
      x-operation-id-source: derived
components:
  schemas:
    oauth.DeviceCodeResponse:
      type: object
      properties:
        device_code:
          type: string
        expires_in:
          type: integer
        interval:
          type: integer
        user_code:
          type: string
        verification_uri:
          type: string
    oauth.TokenResponse:
      type: object
      properties:
        access_token:
          type: string
        expires_in:
          type: integer
        refresh_token:
          type: string
        token_type:
          type: string
    oauth.TokenErrorResponse:
      type: object
      properties:
        error:
          type: string
        error_description:
          type: string
    oauth.AuthorizationServerMetadata:
      type: object
      properties:
        authorization_endpoint:
          type: string
        code_challenge_methods_supported:
          type: array
          items:
            type: string
        device_authorization_endpoint:
          type: string
        grant_types_supported:
          type: array
          items:
            type: string
        issuer:
          type: string
        jwks_uri:
          type: string
        response_types_supported:
          type: array
          items:
            type: string
        revocation_endpoint:
          type: string
        scopes_supported:
          type: array
          items:
            type: string
        token_endpoint:
          type: string
        token_endpoint_auth_methods_supported:
          type: array
          items:
            type: string
  securitySchemes:
    API_Key:
      type: apiKey
      in: header
      name: X-API-Key
    Tenant_ID:
      type: apiKey
      in: header
      name: X-Tenant-Id
    Bearer_Auth:
      type: http
      description: Bearer tokens are used to authenticate from the UI. Must also specify x-tenant-id or x-organization-id (for org scoped apis).
      scheme: bearer
    Organization_ID:
      type: apiKey
      in: header
      name: X-Organization-Id