---
title: "start MCP OAuth popup flow"
method: GET
path: "/mcp/oauth/start"
tags: ["mcp_oauth"]
---

# start MCP OAuth popup flow

`GET /mcp/oauth/start`

Opens in a popup, discovers OAuth metadata, registers client, and redirects to OAuth provider

## Query parameters

- `mcp_server_url` string, required
- `scopes` string

## Other responses

- `302` — Redirect to OAuth provider authorization URL

---

[API](https://skmtc.net/windmill/apis/windmill-api.md) · [All operations](https://skmtc.net/windmill/apis/windmill-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/windmill/windmill-api/revisions/8a5fd82f8851/schema)