LangSmith

LangSmith agents API

The agents API from LangSmith — 2 operation(s) for agents.

GitHub OpenAPI

Documentation

📖
Documentation
https://docs.langchain.com/langsmith
📖
APIReference
https://docs.langchain.com/langsmith/tracing
📖
Documentation
https://docs.langchain.com/langsmith/datasets
📖
Documentation
https://docs.langchain.com/langsmith/evaluation
📖
Documentation
https://docs.langchain.com/langsmith/prompt-hub
📖
Documentation
https://docs.langchain.com/langsmith/feedback
📖
Documentation
https://docs.langchain.com/langsmith/annotation-queues
📖
Documentation
https://docs.langchain.com/langsmith/deployments

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/langsmith/refs/heads/main/openapi/langsmith-agents-api-openapi.yml

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/langsmith-agents-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

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

OpenAPI Specification

langsmith-agents-api-openapi.yml Raw ↑ 
openapi: 3.1.0
info:
  title: LangSmith access_policies agents 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](https://docs.langchain.com/langsmith/create-account-api-key#create-an-api-key).


    '
  version: 0.1.0
servers:
- url: /
tags:
- name: agents
paths:
  /v1/fleet/agents:
    get:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Returns the agents accessible to the authenticated user.
      tags:
      - agents
      summary: List agents
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ListAgentsResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
      parameters: []
    post:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: 'Creates an agent with optional initial file tree. Validation runs

        before any write; the call is atomic. Default response omits the

        full file tree — pass ?include=files to echo it back.'
      tags:
      - agents
      summary: Create an agent
      parameters:
      - description: 'Comma-separated includes. Supported: files'
        name: include
        in: query
        schema:
          type: string
          title: Include
      responses:
        '201':
          description: Created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.CreateAgentResponse'
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '422':
          description: Unprocessable Entity
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/agents.CreateAgentRequest'
  /v1/fleet/agents/{agentID}:
    get:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: Returns the specified agent.
      tags:
      - agents
      summary: Get an agent
      parameters:
      - description: Agent ID
        name: agentID
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.Agent'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '404':
          description: Not Found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
    patch:
      security:
      - API Key: []
      - Tenant ID: []
      - Bearer Auth: []
      description: 'Updates the specified agent. All request fields are optional;

        omitted fields are left unchanged. When a top-level field is

        provided, it replaces the existing value in full. Entries under

        `files` are created or replaced by path; paths listed in

        `deleted_paths` are removed. The call is atomic: if any entry

        fails validation, no changes are applied. The file tree is

        omitted from the response by default; pass ?include=files to

        include it.'
      tags:
      - agents
      summary: Update an agent
      parameters:
      - description: Agent ID
        name: agentID
        in: path
        required: true
        schema:
          type: string
      - description: 'Comma-separated includes. Supported: files'
        name: include
        in: query
        schema:
          type: string
          title: Include
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.UpdateAgentResponse'
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '404':
          description: Not Found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '422':
          description: Unprocessable Entity
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/agents.ErrorResponse'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/agents.UpdateAgentRequest'
components:
  schemas:
    agents.AgentConfigurable:
      type: object
      properties:
        backend_type:
          type: string
        llm_model_config:
          type: object
          additionalProperties: {}
        sandbox_proxy_profile_ids:
          type: array
          items:
            type: string
        triggers_paused:
          type: boolean
        user_email:
          type: string
        user_name:
          type: string
        user_timezone:
          type: string
    agents.FileEntry:
      type: object
      properties:
        content:
          type: string
    agents.AgentMetadata:
      type: object
      properties:
        agent_type:
          type: string
        agent_version:
          type: string
        icon:
          type: string
        icon_color:
          type: string
        shared_read_users:
          type: array
          items:
            type: string
        shared_run_users:
          type: array
          items:
            type: string
        shared_update_users:
          type: array
          items:
            type: string
        tenant_access_level:
          type: string
        visibility_scope:
          type: string
    agents.CreateAgentRequest:
      type: object
      properties:
        config:
          $ref: '#/components/schemas/agents.AgentConfig'
        description:
          type: string
        files:
          type: object
          additionalProperties:
            $ref: '#/components/schemas/agents.FileEntry'
        graph_id:
          type: string
        metadata:
          $ref: '#/components/schemas/agents.AgentMetadata'
        name:
          type: string
    agents.UpdateAgentResponse:
      type: object
      properties:
        assistant_id:
          type: string
        commit_hash:
          type: string
        config:
          $ref: '#/components/schemas/agents.AgentConfig'
        created_at:
          type: string
        description:
          type: string
        files:
          type: object
          additionalProperties:
            $ref: '#/components/schemas/agents.FileEntry'
        graph_id:
          type: string
        metadata:
          $ref: '#/components/schemas/agents.AgentMetadata'
        name:
          type: string
        owner_id:
          type: string
        updated_at:
          type: string
    agents.Agent:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        status:
          type: string
    agents.ListAgentsResponse:
      type: object
      properties:
        agents:
          type: array
          items:
            $ref: '#/components/schemas/agents.Agent'
    agents.UpdateAgentRequest:
      type: object
      properties:
        config:
          $ref: '#/components/schemas/agents.AgentConfig'
        deleted_paths:
          type: array
          items:
            type: string
        description:
          type: string
        files:
          type: object
          additionalProperties:
            $ref: '#/components/schemas/agents.FileEntry'
        metadata:
          $ref: '#/components/schemas/agents.AgentMetadata'
        name:
          type: string
    agents.ErrorResponse:
      type: object
      properties:
        code:
          type: string
        detail:
          type: string
        status:
          type: integer
        type:
          type: string
    agents.CreateAgentResponse:
      type: object
      properties:
        assistant_id:
          type: string
        commit_hash:
          type: string
        config:
          $ref: '#/components/schemas/agents.AgentConfig'
        created_at:
          type: string
        description:
          type: string
        files:
          type: object
          additionalProperties:
            $ref: '#/components/schemas/agents.FileEntry'
        graph_id:
          type: string
        metadata:
          $ref: '#/components/schemas/agents.AgentMetadata'
        name:
          type: string
        owner_id:
          type: string
        updated_at:
          type: string
    agents.AgentConfig:
      type: object
      properties:
        configurable:
          $ref: '#/components/schemas/agents.AgentConfigurable'
  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