Neon MCP Server

Neon MCP Server is an open-source tool that lets you interact with your Neon Postgres databases in natural language.

The Model Context Protocol (MCP) is a standardized protocol designed to manage context between large language models (LLMs) and external systems. This repository provides a remote MCP Server for Neon.

Neon's MCP server acts as a bridge between natural language requests and the Neon API. Built upon MCP, it translates your requests into the necessary API calls, enabling you to manage tasks such as creating projects and branches, running queries, and performing database migrations seamlessly.

Some of the key features of the Neon MCP server include:

• Natural language interaction: Manage Neon databases using intuitive, conversational commands.
• Simplified database management: Perform complex actions without writing SQL or directly using the Neon API.
• Accessibility for non-developers: Empower users with varying technical backgrounds to interact with Neon databases.
• Database migration support: Leverage Neon's branching capabilities for database schema changes initiated via natural language.

For example, in Claude Code, or any MCP Client, you can use natural language to accomplish things with Neon, such as:

• Let's create a new Postgres database, and call it "my-database". Let's then create a table called users with the following columns: id, name, email, and password.
• I want to run a migration on my project called "my-project" that alters the users table to add a new column called "created_at".
• Can you give me a summary of all of my Neon projects and what data is in each one?

[!WARNING]
Neon MCP Server Security Considerations
The Neon MCP Server grants powerful database management capabilities through natural language requests. Always review and authorize actions requested by the LLM before execution. Ensure that only authorized users and applications have access to the Neon MCP Server.

The Neon MCP Server is intended for local development and IDE integrations only. We do not recommend using the Neon MCP Server in production environments. It can execute powerful operations that may lead to accidental or unauthorized changes.

For more information, see MCP security guidance →.

Setting up Neon MCP Server

There are a few options for setting up the Neon MCP Server:

1. Quick Setup with API Key (Cursor, VS Code, and Claude Code): Run neonctl@latest init to automatically configure Neon's MCP Server, agent skills, and VS Code extension with one command.
2. Remote MCP Server (OAuth Based Authentication): Connect to Neon's managed MCP server using OAuth for authentication. This method is more convenient as it eliminates the need to manage API keys. Additionally, you will automatically receive the latest features and improvements as soon as they are released.
3. Remote MCP Server (API Key Based Authentication): Connect to Neon's managed MCP server using API key for authentication. This method is useful if you want to connect a remote agent to Neon where OAuth is not available. Additionally, you will automatically receive the latest features and improvements as soon as they are released.

Prerequisites

• An MCP Client application.
• A Neon account.
• Node.js (>= v18.0.0): Download from nodejs.org.
• If IP Allow is enabled, add 34.192.103.46 and 23.22.233.166 to your allowlist (mcp.neon.tech static IPs).

For development, you'll need Node.js 22+ (pnpm is provided via Corepack — run corepack enable to activate it).

Option 1. Quick Setup with API Key

Don't want to manually create an API key?

Run neonctl@latest init to automatically configure Neon's MCP Server with one command:

npx neonctl@latest init

This works with Cursor, VS Code (GitHub Copilot), and Claude Code. It will authenticate via OAuth, create a Neon API key for you, and configure your editor automatically.

Option 2. Remote Hosted MCP Server (OAuth Based Authentication)

Connect to Neon's managed MCP server using OAuth for authentication. This is the easiest setup, requires no local installation of this server, and doesn't need a Neon API key configured in the client.

Run the following command to add the Neon MCP Server for all detected agents and editors in your workspace:

npx add-mcp https://mcp.neon.tech/mcp

Add the -g flag to add the Neon MCP Server to the global MCP server list instead of project-scoped.

Alternatively, you can add the following "Neon" entry to your client's MCP server configuration file (e.g., mcp.json, mcp_config.json):

{
  "mcpServers": {
    "Neon": {
      "type": "http",
      "url": "https://mcp.neon.tech/mcp"
    }
  }
}

Kiro: Add the following to your Kiro MCP config file (~/.kiro/settings/mcp.json for global, or .kiro/settings/mcp.json for project-scoped):

{
  "mcpServers": {
    "Neon": {
      "url": "https://mcp.neon.tech/mcp"
    }
  }
}

Or use the one-click install button at the top of this README. For more information, see the Kiro MCP documentation.

• Restart or refresh your MCP client.
• An OAuth window will open in your browser. Follow the prompts to authorize your MCP client to access your Neon account.

With OAuth-based authentication, the MCP server will, by default, operate on projects under your personal Neon account. To access or manage projects that belong to an organization, you must explicitly provide either the org_id or the project_id in your prompt to MCP client.

Option 3. Remote Hosted MCP Server (API Key Based Authentication)

Remote MCP Server also supports authentication using an API key in the Authorization header if your client supports it.

Create a Neon API key in the Neon Console. Next, run the following command to add the Neon MCP Server for all detected agents and editors in your workspace:

npx add-mcp https://mcp.neon.tech/mcp --header "Authorization: Bearer <$NEON_API_KEY>"

Alternatively, you can add the following "Neon" entry to your client's MCP server configuration file (e.g., mcp.json, mcp_config.json):

{
  "mcpServers": {
    "Neon": {
      "type": "http",
      "url": "https://mcp.neon.tech/mcp",
      "headers": {
        "Authorization": "Bearer <$NEON_API_KEY>"
      }
    }
  }
}

Provide an organization's API key to limit access to projects under the organization only.

Scopes and Read-Only Mode

Neon MCP supports OAuth scopes read, write, and * (* means both). Your MCP client can request these scopes directly, or you can make the selection in the OAuth permissions UI.

Read-only mode restricts which tools are available, disabling write operations like creating projects, branches, or running migrations. Read-only tools include listing projects, describing schemas, querying data, and viewing performance metrics.

You can set read-only mode in two ways:

1. OAuth scope selection (recommended): In OAuth, select read-only by unchecking Full access in the authorization UI.
2. readonly query param: Add ?readonly=true to your MCP server URL:

{
  "mcpServers": {
    "Neon": {
      "url": "https://mcp.neon.tech/mcp?readonly=true"
    }
  }
}

How the query param behaves:

• API key flow: readonly=true is the way to enable read-only mode (there is no OAuth scope exchange in this flow).
• OAuth flow: readonly=true overrides the OAuth scope. Without it, read-only is determined by the scope selected in the OAuth consent UI.

Legacy HTTP header x-read-only is also supported as a fallback (lower priority than the query param).

Note: Read-only mode restricts which tools are available. Further, the run_sql tool remains available only for read-only queries.

URL Query Params for Access Control

Grant context (scope categories, project scoping, read-only mode) is configured via URL query params on the MCP server URL. Config travels with every request and takes effect immediately — no re-auth needed.

Param	Description	Example
readonly	Enable read-only mode (true/false)	?readonly=true
category	Restrict to specific tool categories (repeated or CSV)	?category=querying&category=schema
projectId	Scope all operations to a single project	?projectId=proj-123

Read-only + project-scoped example:

{
  "mcpServers": {
    "Neon": {
      "url": "https://mcp.neon.tech/mcp?readonly=true&projectId=my-project-id"
    }
  }
}

Category-filtered example (only querying and schema tools):

{
  "mcpServers": {
    "Neon": {
      "url": "https://mcp.neon.tech/mcp?category=querying&category=schema"
    }
  }
}

You can preview which tools are visible for any configuration using the /api/list-tools endpoint (no auth required):

curl "https://mcp.neon.tech/api/list-tools?readonly=true&category=querying"

Tools available in read-only mode

• list_projects, list_shared_projects, describe_project, list_organizations
• describe_branch, list_branch_computes, compare_database_schema
• run_sql, run_sql_transaction, get_database_tables, describe_table_schema
• list_slow_queries, explain_sql_statement
• get_connection_string
• search, fetch, list_docs_resources, get_doc_resource

Tools requiring write access:

• create_project, delete_project
• create_branch, delete_branch, reset_from_parent
• provision_neon_auth, provision_neon_data_api
• prepare_database_migration, complete_database_migration
• prepare_query_tuning, complete_query_tuning

Server-Sent Events (SSE) Transport (Deprecated)

MCP supports two remote server transports: the deprecated Server-Sent Events (SSE) and the newer, recommended Streamable HTTP. If your LLM client doesn't support Streamable HTTP yet, you can switch the endpoint from https://mcp.neon.tech/mcp to https://mcp.neon.tech/sse to use SSE instead.

Run the following command to add the Neon MCP Server for all detected agents and editors in your workspace using the SSE transport:

npx add-mcp https://mcp.neon.tech/sse --type sse

Remote Server Architecture

The remote server runs as a Next.js App Router application on Vercel at mcp.neon.tech.

[!NOTE] The root / path redirects to Neon MCP Server docs. There is no landing page.

Core implementation areas:

• landing/app/api/[transport]/route.ts: MCP transport endpoint for Streamable HTTP (/mcp) and SSE (/sse)
• landing/app/api/authorize/, landing/app/callback/, landing/app/api/token/, landing/app/api/revoke/: OAuth flow endpoints
• landing/app/.well-known/: OAuth discovery metadata endpoints
• landing/mcp-src/: MCP server, tools, handlers, analytics, and Sentry integration
• landing/lib/: Next.js-compatible helpers (OAuth, configuration, error handling)
• landing/mcp-src/utils/read-only.ts: read-only mode and scope handling

Guides

• Neon MCP Server Guide
• Connect MCP Clients to Neon
• Cursor with Neon MCP Server
• Claude Desktop with Neon MCP Server
• Cline with Neon MCP Server
• Windsurf with Neon MCP Server
• Zed with Neon MCP Server

Features

Supported Tools

The Neon MCP Server provides the following actions, which are exposed as "tools" to MCP Clients. You can use these tools to interact with your Neon projects and databases using natural language commands.

Tool Scope Metadata

Each tool definition includes a scope category used for grant-based tool filtering and consent UX. Current categories are:

• projects
• branches
• schema
• querying
• neon_auth
• data_api
• docs
• null (tools without a scope category)

Notes:

• compare_database_schema is categorized under schema.
• provision_neon_data_api is categorized under data_api (separate from neon_auth).
• Read-only enforcement still relies on readOnlySafe and server-side read-only logic; scope is category metadata, not a standalone read/write switch.
• In project-scoped mode (?projectId=...), search and fetch are not available.

Project Management:

• list_projects: Lists the first 10 Neon projects in your account, providing a summary of each project. If you can't find a specific project, increase the limit by passing a higher value to the limit parameter.
• list_shared_projects: Lists Neon projects shared with the current user. Supports a search parameter and limiting the number of projects returned (default: 10).
• describe_project: Fetches detailed information about a specific Neon project, including its ID, name, and associated branches and databases.
• create_project: Creates a new Neon project in your Neon account. A project acts as a container for branches, databases, roles, and computes.
• delete_project: Deletes an existing Neon project and all its associated resources.
• list_organizations: Lists all organizations that the current user has access to. Optionally filter by organization name or ID using the search parameter.

Branch Management:

• create_branch: Creates a new branch within a specified Neon project. Leverages Neon's branching feature for development, testing, or migrations.
• delete_branch: Deletes an existing branch from a Neon project.
• describe_branch: Retrieves details about a specific branch, such as its name, ID, and parent branch.
• list_branch_computes: Lists compute endpoints for a project or specific branch, including compute ID, type, size, last active time, and autoscaling information.
• compare_database_schema: Shows the schema diff between the child branch and its parent
• reset_from_parent: Resets the current branch to its parent's state, discarding local changes. Automatically preserves to backup if branch has children, or optionally preserve on request with a custom name.

SQL Query Execution:

• get_connection_string: Returns your database connection string.
• run_sql: Executes a single SQL query against a specified Neon database. Supports both read and write operations.
• run_sql_transaction: Executes a series of SQL queries within a single transaction against a Neon database.
• get_database_tables: Lists all tables within a specified Neon database.
• describe_table_schema: Retrieves the schema definition of a specific table, detailing columns, data types, and constraints.

Database Migrations (Schema Changes):

• prepare_database_migration: Initiates a database migration process. Critically, it creates a temporary branch to apply and test the migration safely before affecting the main branch.
• complete_database_migration: Finalizes and applies a prepared database migration to the main branch. This action merges changes from the temporary migration branch and cleans up temporary resources.

SQL Querying and Optimization:

• list_slow_queries: Identifies performance bottlenecks by finding the slowest queries in a database. Requires the pg_stat_statements extension.
• explain_sql_statement: Provides detailed execution plans for SQL queries to help identify performance bottlenecks.
• prepare_query_tuning: Analyzes query performance and suggests optimizations, like index creation. Creates a temporary branch for safely testing these optimizations.
• complete_query_tuning: Finalizes query tuning by either applying optimizations to the main branch or discarding them. Cleans up the temporary tuning branch.

Neon Auth:

• provision_neon_auth: Provisions Neon Auth for a Neon project. It allows developers to easily set up authentication infrastructure by creating an integration with an Auth provider.

Neon Data API:

• provision_neon_data_api: Provisions the Neon Data API for HTTP-based database access with optional JWT authentication via Neon Auth or external JWKS providers.

Search and Discovery:

• search: Searches across organizations, projects, and branches matching a query. Returns IDs, titles, and direct links to the Neon Console.
• fetch: Fetches detailed information about a specific organization, project, or branch using an ID (typically from the search tool).

Documentation and Resources:

• list_docs_resources: Lists all available Neon documentation pages by fetching the index from https://neon.com/docs/llms.txt. Returns page URLs and titles that can be fetched individually using the get_doc_resource tool.
• get_doc_resource: Fetches a specific Neon documentation page as markdown content. Use the list_docs_resources tool first to discover available page slugs, then pass the slug to this tool.

Migrations

Migrations are a way to manage changes to your database schema over time. With the Neon MCP server, LLMs are empowered to do migrations safely with separate "Start" (prepare_database_migration) and "Commit" (complete_database_migration) commands.

The "Start" command accepts a migration and runs it in a new temporary branch. Upon returning, this command hints to the LLM that it should test the migration on this branch. The LLM can then run the "Commit" command to apply the migration to the original branch.

Development

This project uses pnpm as the package manager, pinned via Corepack.

Project Structure

The MCP server code lives in the landing/ directory, which is a Next.js application deployed to Vercel at mcp.neon.tech.

cd landing
corepack enable
pnpm install

Local Development

# Start the Next.js dev server (for the remote MCP server)
pnpm run dev

Linting and Type Checking

pnpm run lint
pnpm run typecheck

Environment Variables

Required for remote server runtime:

Variable	Description
SERVER_HOST	Server URL (defaults to VERCEL_URL)
UPSTREAM_OAUTH_HOST	Neon OAuth provider URL
CLIENT_ID	OAuth client ID
CLIENT_SECRET	OAuth client secret
COOKIE_SECRET	Secret for signed cookies
KV_URL	Vercel KV (Upstash Redis) URL
OAUTH_DATABASE_URL	Postgres URL for token storage

Optional:

Variable	Description
LOG_LEVEL	Winston log level: error, warn, info (default), debug, verbose, silly

Testing Pyramid

All tests run from landing/.

cd landing

# Unit tests
pnpm run test:unit

# Integration tests
pnpm run test:integration

# MCP protocol end-to-end tests (real MCP client/server tool calls)
pnpm run test:e2e:mcp

# Website end-to-end tests (Playwright; provisions/validates ephemeral DB first)
pnpm run test:e2e:web

# Full end-to-end suite
pnpm run test:e2e

# Full test pyramid (unit + integration + e2e; used in CI)
pnpm run test

Testing strategy:

• Prefer E2E for transport/protocol and user-visible behavior.
• Use integration tests for deterministic tool contracts and workflow behavior.
• Use unit tests for pure logic and edge cases.
• Avoid relying on third-party uptime in merge-gating tests; mock external dependencies in integration/unit tiers.

Deployment

Vercel deploys the remote server automatically from the repository branch configuration. Preview environments are available for pull requests.