Supabase MCP vs Postgres MCP

Two MCP servers for letting agents read and write your database

The official Supabase MCP server and the reference Postgres MCP server both let agents query a database. Different scopes, different defaults, different blast radius.

The contenders

Each pick links through to its full Directories entry.

M MCP

Supabase MCP Server

by Supabase

Official MCP server for Supabase. Let any MCP-compatible agent query, mutate, and migrate against your project.

Best for: Teams already on Supabase who want agent access to the full project, not just the DB.

Read the full entry

M MCP

Postgres MCP Server

by Model Context Protocol (reference)

Reference MCP server for Postgres. Read schema, run scoped queries, give agents structured DB access without a dashboard tab.

Best for: Teams on raw Postgres or RDS who want a clean read-only-by-default agent surface.

Read the full entry

Side by side

Same criteria, three answers. The verdict is opinionated and lives below the table.

Criterion	Supabase MCP Server	Postgres MCP Server
Scope	Full Supabase project: DB, edge functions, migrations, auth	Database only
Default safety	Scoped tokens, you choose permissions	Read-only by default, write requires explicit setup
Setup effort	Low: pick your token scope, run	One-click: connection string + spawn
Multi-tenant story	You wrap the client per tenant or scope by RLS	You wrap the client per tenant
Best for	Anything beyond pure SQL (migrations, edge functions)	Pure analytical agent queries
Watch out for	Service-role tokens have wide blast radius	Schema introspection cost on huge DBs

Verdict

On Supabase, take the Supabase MCP server. It is the official surface, it covers more than the database, and the project-level permissions model is the right granularity for agent work. Pin it to a non-service-role token unless the work absolutely needs one.

On raw Postgres or RDS, the reference Postgres MCP is the cleanest answer. It is small, it is read-only by default, and it is the right base to fork from when you want a tenant-scoped variant.

The non-trivial answer: many teams run both. Supabase MCP for project work, Postgres MCP for analytical agents that should never write. Different servers, different scopes, different audit trails. The protocol is built for this composition.

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