---
title: "Register per-user MCP OAuth provider"
method: POST
path: "/v1/fleet/mcp-servers/{mcp_server_id}/oauth-provider"
tags: ["fleet mcp"]
---

# Register per-user MCP OAuth provider

`POST /v1/fleet/mcp-servers/{mcp_server_id}/oauth-provider`

Discovers and registers an OAuth provider for a user against an MCP server configured with per-user dynamic client mode. Idempotent when a mapping already exists.

## Path parameters

- `mcp_server_id` string, required

## Request body

- LangchainComSmithFleetMcpServersRegisterOAuthProviderPayload
  - `ls_user_id` string

## Response `200`

OK

- LangchainComSmithFleetMcpServersRegisterOAuthProviderResponse
  - `oauth_provider_id` string

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `404` — Not Found
- `500` — Internal Server Error
- `503` — Service Unavailable

---

[API](https://skmtc.net/langchain-ai/apis/langsmith.md) · [All operations](https://skmtc.net/langchain-ai/apis/langsmith/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/langchain-ai/langsmith/revisions/a0acb3a6a101/schema)