Ainative Postgres MCP

ainative-postgres-mcp

Zero-config PostgreSQL MCP server with auto-provisioning. Drop-in replacement for @modelcontextprotocol/server-postgres — no DATABASE_URL needed.

The official @modelcontextprotocol/server-postgres requires you to bring your own Postgres database and pass a connection string. This fork auto-provisions a managed PostgreSQL instance with pgvector on first run. Agents get a database instantly with zero configuration.

Quick Start

npx ainative-postgres-mcp

That's it. On first run:

1. A free managed PostgreSQL instance is provisioned
2. pgvector extension is enabled automatically
3. Connection details are saved to ~/.ainative/postgres-config.json, .env, and .mcp.json
4. A claim URL is printed so you can take ownership of the database

MCP Configuration

Claude Code / Claude Desktop

Add to your claude_desktop_config.json or .mcp.json:

{

"mcpServers": { "postgres": { "command": "npx", "args": ["-y", "ainative-postgres-mcp"] } } }

With existing database

{

"mcpServers": { "postgres": { "command": "npx", "args": ["-y", "ainative-postgres-mcp"], "env": { "DATABASE_URL": "postgresql://user:pass@host:5432/mydb" } } } }

Cursor

Add to .cursor/mcp.json:

{

"mcpServers": { "postgres": { "command": "npx", "args": ["-y", "ainative-postgres-mcp"] } } }

Windsurf

Add to ~/.windsurf/mcp.json:

{

"mcpServers": { "postgres": { "command": "npx", "args": ["-y", "ainative-postgres-mcp"] } } }

Tools

Comparison with official server-postgres

How Auto-Provisioning Works

Start

| v DATABASE_URL set? ----yes----> Connect directly | no v ~/.ainative/postgres-config.json exists? ----yes----> Load and connect | no v .mcp.json has DATABASE_URL? ----yes----> Load and connect | no v POST /api/v1/public/instant-db (get API key) | v POST /api/v1/zerodb/postgres/provision (get Postgres) | v Save to ~/.ainative/postgres-config.json + .env + .mcp.json | v Connect and enable pgvector

pgvector Support

pgvector is automatically enabled on provisioned instances. You can use vector columns in your tables:

CREATE TABLE documents (

id SERIAL PRIMARY KEY, content TEXT, embedding vector(1536) );

And run similarity searches:

SELECT content, embedding <=> '[0.1, 0.2, ...]'::vector AS distance

FROM documents ORDER BY distance LIMIT 10;

Environment Variables

Free Tier

Auto-provisioned instances include:

• Managed PostgreSQL with pgvector
• Shared compute (suitable for development and light production)
• Automatic backups
• SSL encryption

Sign up at ainative.studio to claim your instance and unlock higher limits.

License

MIT

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Powered by ZeroDB + AINative

This package is part of the AINative ecosystem — the AI-native developer platform.

Why ZeroDB?

Get Started Free

npx zerodb-cli init    # Auto-configures your IDE

Or sign up at [ainative.studio](https://ainative.studio) — free tier, no credit card required.

View all ZeroDB packages →

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Zero-Config Auto-Provisioning

No account needed to start. On first run, this package automatically:

1. Provisions a free ZeroDB instance (~800ms)
2. Saves credentials locally (.env, .mcp.json)
3. Prints a claim link in your terminal

The 72-Hour Window

Your auto-provisioned instance is free for 72 hours. To keep your data permanently, visit the claim URL printed in your terminal.

For AI Agents

If a coding agent (Claude Code, Cursor, Windsurf) installs this package:

• Auto-provisions without human intervention
• The claim URL appears in agent output — visit it to take ownership
• .claude/CLAUDE.md instructs agents to surface the claim link to you
• Check .env or ~/.ainative/config.json for your project ID if you miss it