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supabase/apps/ui-library/public/r/mcp.json
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Katerina Skroumpelou 2013ebf417 docs: drop alpha labels and pin server and middleware imports to a major (#51031) 
## Problem

`@supabase/middleware` ships as 1.0.0. The docs still label the
`pipeline` entry form of `withSupabase` alpha, and several snippets
import `npm:@supabase/server` and `npm:@supabase/middleware` with no
version or with a `^0.5.0` pin. A snippet without a version leaves
readers and tools to guess one, and a guessed version fails on deploy.

## Solution

- Removes the alpha wording from the middleware reference intro and
usage examples, the server frameworks partial, and the Bring your own
MCP guide. The `@supabase/server` 1.6.0 floor stays.
- Pins every `npm:@supabase/server` and `npm:@supabase/middleware`
import in the guides to a major range, `@1`, following the
`npm:@supabase/supabase-js@2` convention in Managing dependencies.
- Bumps the authenticated-mcp-server example to middleware `^1.0.0` and
server `^1.9.0`.

~~Blocked by supabase/middleware#49. The `@1` range resolves once 1.0.0
is on npm.~~




<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Documentation**
* Updated authentication, API key, and MCP examples to use versioned
Supabase server and middleware packages.
* Clarified that pipeline and nested composition behave the same, and
that both require `@supabase/server` 1.6.0 or later.
* Removed alpha-status labels from `withSupabase` guidance while
retaining the 1.6.0 minimum-version requirement.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-09-30 17:27:44 +03:00

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{
"$schema": "https://ui.shadcn.com/schema/registry-item.json",
"name": "mcp",
"title": "MCP Server",
"description": "Add a user-scoped MCP server to your product.",
"files": [
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/index.ts",
"content": "import 'jsr:@supabase/functions-js@2.108.2/edge-runtime.d.ts'\n\nimport { createMcpHandler, McpServer } from 'npm:@modelcontextprotocol/server@2.0.0'\nimport { pipeline } from 'npm:@supabase/middleware@1'\nimport {\n withOAuthProtectedResource,\n withSupabase,\n type SupabaseContext,\n} from 'npm:@supabase/server@1'\n\nimport { registerTools, type ToolContext } from './tools/index.ts'\n\n// An MCP server as a single Supabase Edge Function, composed as a pipeline:\n//\n// withOAuthProtectedResource OAuth discovery for external MCP clients. Runs\n// before the auth gate so unauthenticated clients\n// can fetch the RFC 9728 metadata, and adds the\n// WWW-Authenticate challenge to the gate's 401.\n// withSupabase Verifies the user access token and builds an\n// RLS-scoped client, so both embedded product\n// agents and external OAuth clients act as the\n// signed-in user.\n// handleMcp MCP transport and tools (./tools/index.ts).\n//\n// On Supabase Edge Functions the public URLs in the OAuth metadata are derived\n// automatically, locally and hosted. Off Edge Functions, pass `resourceServer`\n// and `authorizationServer` to withOAuthProtectedResource.\n\nfunction readTextEnv(name: string, fallback: string): string {\n return Deno.env.get(name)?.trim() || fallback\n}\n\nconst SERVER_NAME = readTextEnv('MCP_SERVER_NAME', 'supabase-mcp')\nconst SERVER_DESCRIPTION = readTextEnv(\n 'MCP_SERVER_DESCRIPTION',\n 'MCP access to this Supabase project for the signed-in user.'\n)\n\nconst SERVER_INSTRUCTIONS =\n `${SERVER_DESCRIPTION} ` +\n 'Every tool runs as the signed-in Supabase user, so role grants and Row Level Security apply. ' +\n \"Call tools/list to discover what this project exposes, and read a tool's description and \" +\n 'annotations before calling it — some tools have side effects.'\n\nconst CORS_HEADERS: Record<string, string> = {\n 'Access-Control-Allow-Origin': '*',\n 'Access-Control-Allow-Methods': 'GET, POST, DELETE, OPTIONS',\n 'Access-Control-Allow-Headers':\n 'Authorization, Content-Type, Accept, Mcp-Protocol-Version, Mcp-Session-Id, Mcp-Method, Mcp-Name',\n 'Access-Control-Expose-Headers': 'WWW-Authenticate, Mcp-Session-Id',\n}\n\nfunction createServer(context: ToolContext): McpServer {\n const server = new McpServer(\n { name: SERVER_NAME, version: '1.0.0' },\n { instructions: SERVER_INSTRUCTIONS }\n )\n\n registerTools(server, context)\n return server\n}\n\nasync function handleMcp(request: Request, ctx: SupabaseContext): Promise<Response> {\n // The server and its tools are bound to this caller for exactly one request.\n const handler = createMcpHandler(\n () =>\n createServer({\n supabase: ctx.supabase,\n // auth: 'user' guarantees both claim shapes before this handler runs.\n userClaims: ctx.userClaims!,\n jwtClaims: ctx.jwtClaims!,\n }),\n { onerror: (error) => console.error('MCP request failed', error) }\n )\n\n return handler.fetch(request)\n}\n\n// The handler is passed inline so TypeScript infers its context from the entries.\n// Passing `handleMcp` directly collapses the inferred context to `object`.\nDeno.serve(\n pipeline(\n [withOAuthProtectedResource(), withSupabase({ auth: 'user', cors: { headers: CORS_HEADERS } })],\n (request, ctx) => handleMcp(request, ctx)\n )\n)\n",
"type": "registry:file",
"target": "~/supabase/functions/mcp/index.ts"
},
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/deno.json",
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"type": "registry:file",
"target": "~/supabase/functions/mcp/deno.json"
},
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/deno.lock",
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"type": "registry:file",
"target": "~/supabase/functions/mcp/deno.lock"
},
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/.env.example",
"content": "# Copy this file to supabase/functions/.env before serving locally:\n# cp supabase/functions/mcp/.env.example supabase/functions/.env\n# supabase functions serve mcp --env-file supabase/functions/.env\n\n# Deploy these values after linking your project:\n# supabase secrets set --env-file supabase/functions/.env\n# Supabase provides the project URL and API keys automatically.\n\n# Keep the protocol-level server name short and project-specific.\nMCP_SERVER_NAME=supabase-mcp\nMCP_SERVER_DESCRIPTION=\"MCP access to this Supabase project for the signed-in user.\"\n",
"type": "registry:file",
"target": "~/supabase/functions/mcp/.env.example"
},
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/tools/types.ts",
"content": "import type { SupabaseContext } from 'npm:@supabase/server@1'\nimport type { SupabaseClient } from 'npm:@supabase/supabase-js@2.108.2'\n\n// Only expose the user-scoped client and verified identity to tools. Keeping\n// supabaseAdmin out of this type makes bypassing RLS an explicit design choice.\nexport type ToolContext = {\n supabase: SupabaseClient\n userClaims: NonNullable<SupabaseContext['userClaims']>\n jwtClaims: NonNullable<SupabaseContext['jwtClaims']>\n}\n",
"type": "registry:file",
"target": "~/supabase/functions/mcp/tools/types.ts"
},
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/tools/result.ts",
"content": "import type { CallToolResult } from 'npm:@modelcontextprotocol/server@2.0.0'\n\n// Shared helpers for building MCP tool results, so every tool returns the same\n// shape and signals failure the same way.\n\n/**\n * A successful structured result with a JSON text fallback for older clients.\n */\nexport function jsonResult(value: unknown): CallToolResult {\n return {\n content: [{ type: 'text', text: JSON.stringify(value) ?? 'null' }],\n structuredContent: value ?? null,\n }\n}\n\n/**\n * A failed result. The message goes back to the model so it can correct itself,\n * so keep it actionable — and free of credentials, claims, and stack traces.\n */\nexport function errorResult(message: string): CallToolResult {\n return {\n isError: true,\n content: [{ type: 'text', text: message }],\n }\n}\n\nfunction readString(value: unknown, key: string): string | null {\n if (!value || typeof value !== 'object' || !(key in value)) return null\n const property = (value as Record<string, unknown>)[key]\n return typeof property === 'string' && property ? property : null\n}\n\n/**\n * Turn an unknown thrown value into a safe MCP error. Supabase API errors often\n * carry a `code` and `hint`, both of which help a model fix its next call.\n */\nexport function runtimeErrorResult(error: unknown): CallToolResult {\n const message = error instanceof Error ? error.message : String(error)\n const code = readString(error, 'code')\n const hint = readString(error, 'hint')\n\n return errorResult(\n [code ? `[${code}]` : null, message, hint ? `Hint: ${hint}` : null].filter(Boolean).join(' ')\n )\n}\n",
"type": "registry:file",
"target": "~/supabase/functions/mcp/tools/result.ts"
},
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/tools/whoami.ts",
"content": "import type { McpServer } from 'npm:@modelcontextprotocol/server@2.0.0'\n\nimport { jsonResult } from './result.ts'\nimport type { ToolContext } from './types.ts'\n\n// Answers from verified claims, demonstrating that every tool runs as the\n// signed-in user. client_id is present for OAuth tokens and null for ordinary\n// product sessions.\nexport function registerWhoamiTool(\n server: McpServer,\n { userClaims, jwtClaims }: ToolContext\n): void {\n const clientId =\n typeof jwtClaims?.client_id === 'string' && jwtClaims.client_id ? jwtClaims.client_id : null\n\n server.registerTool(\n 'whoami',\n {\n description: \"Return the signed-in user's identity and OAuth client id, when present.\",\n annotations: {\n readOnlyHint: true,\n destructiveHint: false,\n openWorldHint: false,\n },\n },\n () =>\n jsonResult({\n id: userClaims.id,\n email: userClaims.email ?? null,\n role: userClaims.role ?? null,\n client_id: clientId,\n })\n )\n}\n",
"type": "registry:file",
"target": "~/supabase/functions/mcp/tools/whoami.ts"
},
{
"path": "registry/default/blocks/mcp/supabase/functions/mcp/tools/index.ts",
"content": "import type { McpServer } from 'npm:@modelcontextprotocol/server@2.0.0'\n\nimport type { ToolContext } from './types.ts'\nimport { registerWhoamiTool } from './whoami.ts'\n\nexport type { ToolContext } from './types.ts'\n\n// The one composition point for this server. Add one registration call for\n// each tool module; the MCP SDK rejects duplicate protocol tool names.\nexport function registerTools(server: McpServer, context: ToolContext): void {\n registerWhoamiTool(server, context)\n}\n",
"type": "registry:file",
"target": "~/supabase/functions/mcp/tools/index.ts"
}
],
"docs": "Disable gateway JWT verification, then deploy the Edge Function. A trusted product backend can call it with the signed-in user's access token. For external clients, install the [OAuth Consent block](https://supabase.com/library/docs/nextjs/oauth-consent), enable OAuth and dynamic registration, and set the Auth Site URL to the consent app. Every call runs through the user's RLS-scoped client. OAuth tokens include `client_id`; product sessions do not, so define policies for both paths. See [MCP authentication](https://supabase.com/docs/guides/auth/oauth-server/mcp-authentication) and [token security](https://supabase.com/docs/guides/auth/oauth-server/token-security).",
"type": "registry:item"
}
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