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LangChain

LangChain mcp API

The mcp API from LangChain — 2 operation(s) for mcp.

Documentation Provider Profile APIs.io OpenAPI GitHub

LangChain mcp API is one of 66 APIs that LangChain publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include MCP. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and authentication docs.

This API exposes 4 operations across 2 paths, and defines 3 schemas. It is described by OpenAPI 3.1.0, at version 0.1.0.

Requests are made against a single base URL, /.

4 operations 2 paths 3 schemas 1 DELETE2 GET1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
0.1.0
Base URL
https://api.smith.langchain.com
Authentication
API Key, API Key, HTTP Bearer, API Key
Resource Areas
1

Authentication & Security 4

LangChain mcp API declares 4 security schemes for authenticating requests. An API key is passed in the header as X-API-Key (API Key). An API key is passed in the header as X-Tenant-Id (Tenant ID). It accepts HTTP bearer tokens (Bearer Auth). An API key is passed in the header as X-Organization-Id (Organization ID).

  • Bearer Auth — Bearer tokens are used to authenticate from the UI. Must also specify x-tenant-id or x-organization-id (for org scoped apis).

Paths & Operations 4

Across 2 paths, the API surfaces 4 operations — 1 DELETE, 2 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.

mcp 4
GET
/api/v1/mcp/tools
Get Tools
get_tools_api_v1_mcp_tools_get 4 params → 200422
DELETE
/api/v1/mcp/tools
Invalidate Tools Cache
invalidate_tools_cache_api_v1_mcp_tools_delete 3 params → 200422
GET
/api/v1/mcp/proxy
Proxy Get
proxy_get_api_v1_mcp_proxy_get 3 params → 200422
POST
/api/v1/mcp/proxy
Proxy
proxy_api_v1_mcp_proxy_post body → 200422

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are ProxyRequest (6 properties), ValidationError (3 properties), HTTPValidationError (1 property). Each schema is shown below with its type and property counts.

ValidationError
object
3 properties 3 required
ProxyRequest
object
6 properties 1 required
HTTPValidationError
object
1 property

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

langchain-mcp-api-openapi.yml Raw ↑

Other APIs LangChain publishes across the network.

LangChain access_policies API
AE Profile APIs.io
LangChain ace API
AE Profile APIs.io
LangChain alert_rules API
AE Profile APIs.io
LangChain annotation-queues API
AE Profile APIs.io
LangChain api-key API
AE Profile APIs.io
LangChain audit-logs API
AE Profile APIs.io
LangChain auth API
AE Profile APIs.io
LangChain aws_marketplace API
AE Profile APIs.io
LangChain backfills API
AE Profile APIs.io
LangChain beacon API
AE Profile APIs.io
LangChain bulk-exports API
AE Profile APIs.io
LangChain charts API
AE Profile APIs.io
#MCP
← Back to L APIs
API Details
ID
langchain:langchain-mcp-api
Base URL
https://api.smith.langchain.com
Docs
https://docs.langchain.com/langsmith
Provider
LangChain
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