How to connect Supabase to Claude Code

1. 1. Enable Supabase in Metorial

   In your Metorial portal, enable the Supabase MCP server and sign in with the account that owns the data. Access stays governed by your team policies.

2. 2. Add the server over HTTP

   Add --scope user to use it in every project.

   Copy

   claude mcp add --transport http metorial <your-magic-mcp-url>

3. 3. Sign in

   Run /mcp, select Metorial and sign in to load Supabase tools.

• Invoke Database Function: Call a PostgreSQL function (RPC) through the Supabase REST API.
• Manage Project: Create, pause, restore, or delete a Supabase project.
• Manage Storage Objects: List, inspect, upload, update, download, move, copy, or delete files in Supabase Storage buckets.
• Manage Edge Functions: List, get, create, update, or delete Supabase Edge Functions.
• Manage Table Rows: Insert, update, upsert, or delete rows in a Supabase table using the auto-generated REST API.
• List Projects: List all Supabase projects accessible to the authenticated user.
• Manage Storage Buckets: List, get, create, update, empty, or delete storage buckets in a Supabase project.
• Run SQL Query: Execute a raw SQL query against a Supabase project's PostgreSQL database via the Management API.
• List Organizations: List all Supabase organizations accessible to the authenticated user.
• Get Auth Config: Retrieve or update the authentication configuration for a Supabase project.
• Manage Secrets: List, create, or delete secrets (environment variables) for a Supabase project.
• Manage Auth Users: List, get, create, update, or delete authentication users in a Supabase project.
• Get Project: Retrieve detailed information about a specific Supabase project, including its configuration, status, database host, and API keys.
• Query Table: Query rows from a Supabase table using the auto-generated REST API (PostgREST).
• Get Project Logs: Query Supabase project logs through the Management API.
• And 2 more on the Supabase MCP server page.

• Supabase tools appear as mcp__metorial__<tool>. Use that name in permission rules to allow or deny a tool.
• Run /mcp to see whether Metorial is connected and to sign in again.
• Claude Code warns when a tool result passes 10,000 tokens and caps it at 25,000 by default. Raise the cap with MAX_MCP_OUTPUT_TOKENS.
• Pre-approve trusted Supabase tools with allow rules in your settings so Claude Code stops asking each time.

claude mcp list shows "Needs authentication"

Run /mcp, select Metorial, and sign in. If sign-in keeps failing, choose Clear authentication in the same menu and sign in again.

A teammate sees "Pending approval"

Servers shared through a project .mcp.json need approval. Run claude in the project and approve Metorial when asked.

Large tool results are cut off

Claude Code limits MCP tool output to 25,000 tokens by default. Raise it with the MAX_MCP_OUTPUT_TOKENS environment variable.

Based on the Claude Code MCP documentation.