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## Summary Splits the Stack Auth MCP server out of `apps/backend` and into a dedicated Next.js app at `apps/mcp/`, served on port `:42` (suffixed via `NEXT_PUBLIC_STACK_PORT_PREFIX`) and exposed in production at `https://mcp.stack-auth.com/mcp`. The backend no longer carries the MCP transport route; clients now point at the new host. Base: `dev` → Head: `chore/move-mcp-to-a-sep-app` Scope: 34 files, +1425 / −353 ## What changed - **New app** `apps/mcp/` — standalone Next.js + `@vercel/mcp-adapter`, with: - `src/app/api/internal/[transport]/route.ts` — MCP transport handler (moved from backend) - `src/app/mcp/route.ts`, `src/app/route.ts` — public landing + setup page - `src/app/health/route.ts` — health check - `src/mcp-handler.ts`, `src/setup-page.ts`, `src/analytics.ts` - **Backend** drops `apps/backend/src/app/api/internal/[transport]/route.ts` (−105) — MCP code is gone from the backend image. - **Dashboard** install hint updated to point at `https://mcp.stack-auth.com/mcp` (was `/`). - **Dev launchpad** gets an MCP tile so the new service shows up alongside the rest of the local stack. - **CI** workflows (`db-migration-backwards-compatibility`, `e2e-api-tests*`) start the MCP service in the background before running tests. - **Docs** (`docs-mintlify`, `docs/`) and `init-stack` / `init-prompt` updated to reference the new URL. - **E2E** `apps/e2e/tests/backend/endpoints/api/v1/internal/mcp.test.ts` reworked to hit the new host; `helpers.ts` and env files gain an MCP base-URL var. ## Visuals ### New `apps/mcp` setup page (`https://mcp.stack-auth.com/`) The standalone app's root now serves a self-contained MCP setup guide with per-client instructions (Cursor, VS Code, Codex, Claude Code, Claude Desktop, Windsurf, ChatGPT, Gemini CLI):  ### Dev launchpad now lists the MCP service New tile at port suffix `:42`, importance 2, alongside Backend / Dashboard / Demo app:  ## Notes for reviewers - The MCP transport endpoint moved path: it was mounted under `/api/internal/[transport]` in the backend; in the new app it's at the same path but on the dedicated host. The public-facing URL is `https://mcp.stack-auth.com/mcp`. - `apps/mcp` ships its own PostHog analytics client (`src/analytics.ts`) so the backend doesn't have to proxy events for it anymore. - Port allocation: `${PORT_PREFIX}42` (default `8142` in dev). Picked to fit the existing dev-launchpad importance-2 row. - No DB migrations. ## Test plan - [x] `apps/mcp` builds and `pnpm dev` serves on `:8142` - [x] Dev launchpad renders the new MCP tile (screenshot above) - [x] MCP setup page renders client tabs (screenshot above) - [x] E2E `mcp.test.ts` updated to hit the new host - [ ] CI green on `e2e-api-tests*` and `db-migration-backwards-compatibility` workflows (they were touched to start the MCP service) - [ ] `init-stack` / `mcp.ts` install flow lands users on the new URL <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Standalone MCP app added with a public /mcp endpoint and health check. * MCP appears in the dev-launchpad apps list. * **Documentation** * MCP endpoint updated to https://mcp.stack-auth.com/mcp in all setup guides and installer snippets. * Setup page enhanced with detailed client install tabs and instructions. * **Chores** * MCP service integrated into CI/e2e workflows and local env configs. <!-- end of auto-generated comment: release notes by coderabbit.ai --> |
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| content/docs | ||
| lib | ||
| public | ||
| scripts | ||
| src | ||
| templates-api | ||
| .env | ||
| .env.development | ||
| .eslintrc.json | ||
| .gitignore | ||
| cli.json | ||
| instrumentation-client.ts | ||
| next.config.mjs | ||
| package.json | ||
| postcss.config.mjs | ||
| README.md | ||
| source.config.ts | ||
| tsconfig.json | ||
Stack Auth Documentation
This is the documentation site for Stack Auth, built with Next.js and Fumadocs.
Development
pnpm dev
The docs server runs on port 8104 by default (or ${NEXT_PUBLIC_STACK_PORT_PREFIX}04).
Project Structure
Content (/content)
| Directory | Description |
|---|---|
content/docs/ |
Main documentation (guides, SDK reference, components) |
content/api/ |
REST API reference documentation |
App Routes (/src/app)
| Route | Description |
|---|---|
/docs |
Main documentation pages |
/api |
API reference pages (rendered from OpenAPI specs) |
/docs-embed |
Embedded docs for dashboard companion widget |
/api-embed |
Embedded API docs for dashboard companion widget |
/mcp-browser |
MCP documentation browser |
/handler/[...stack] |
Stack Auth handler route |
/api/search |
Search API endpoint |
/api/chat |
AI documentation chat endpoint |
/llms.txt |
LLM-friendly documentation (plain text) |
/llms.mdx |
LLM-friendly documentation (MDX format) |
SDK Route Handlers
These routes serve SDK-specific documentation:
/js/[...path]- JavaScript SDK/next/[...path]- Next.js SDK/react/[...path]- React SDK/python/[...path]- Python SDK/rest-api/[...path]- REST API
Key Files
| File | Description |
|---|---|
lib/source.ts |
Content source adapter using Fumadocs loader() |
source.config.ts |
Fumadocs MDX configuration (frontmatter schema, etc.) |
app/layout.config.tsx |
Shared layout options |
lib/platform-config.ts |
Platform/framework configuration for code examples |
Components (/src/components)
| Directory | Description |
|---|---|
api/ |
API playground components |
chat/ |
AI chat interface |
layout/ |
Layout UI components (search, navigation) |
layouts/ |
Page layouts (docs, API) |
mdx/ |
Custom MDX components |
stack-auth/ |
Stack Auth demo components |
ui/ |
Base UI components (button, etc.) |
OpenAPI Specs (/openapi)
Contains OpenAPI JSON specifications organized by access level:
client-*.json- Client-side API endpointsserver-*.json- Server-side API endpointsadmin-*.json- Admin API endpointswebhooks-*.json- Webhook event schemas
Scripts
# Generate API docs from OpenAPI specs
pnpm generate-openapi-docs
# Clear generated docs
pnpm clear-docs