Midplane MCP Server

by midplaneaiai.midplane/midplanev0.20.0

Safe-by-default SQL guardrails for AI agents: AST-checked queries, per-table policy, audit log.

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Active6d ago

Install Midplane MCP server

claude mcp add midplaneai -e DATABASE_URL='<database-url>' -- npx -y midplane server

{
  "mcpServers": {
    "midplaneai": {
      "command": "npx",
      "args": [
        "-y",
        "midplane",
        "server"
      ],
      "env": {
        "DATABASE_URL": "<database-url>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "midplaneai": {
      "command": "npx",
      "args": [
        "-y",
        "midplane",
        "server"
      ],
      "env": {
        "DATABASE_URL": "<database-url>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "midplaneai": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "midplane",
        "server"
      ],
      "env": {
        "DATABASE_URL": "<database-url>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "midplaneai": {
      "command": "npx",
      "args": [
        "-y",
        "midplane",
        "server"
      ],
      "env": {
        "DATABASE_URL": "<database-url>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
DATABASE_URL	yes	yes	Postgres connection string the agent's queries run against. Give it a least-privilege role: Midplane constrains what SQL is allowed, it does not widen or narrow what the role itself can reach.
MIDPLANE_POLICY_FILE	—	—	Path to a policy YAML granting per-table read/read_write access, tenant scoping, and column masking. Omit for the safe default: reads allowed, writes and DDL denied. Generate one with `npx midplane init`.
DB_PATH	—	—	Where the local SQLite audit log is written. Defaults to ~/.midplane/audit.db; read it back with `midplane audit denies`.
MIDPLANE_TELEMETRY	—	—	Set to 0 to disable anonymous usage telemetry (DO_NOT_TRACK=1 also works). Never includes SQL, table or column names, or identifiers.
PORT	—	—	Port the Streamable HTTP transport binds. Must match the url above if changed.

Freshness

Active — last maintenance signal 6d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-03 · 6d ago · GitHub
Latest release
2026-10-03 · 6d ago · GitHub · v0.22.0
Package published
no data · npm/PyPI
Registry entry updated
2026-08-25 · 45d ago · official registry · v0.20.0

FAQ

›How do I install the Midplane MCP server in Claude Code?

Run: claude mcp add midplaneai -e DATABASE_URL='<database-url>' -- npx -y midplane server. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Midplane require an API key?

Yes. It expects DATABASE_URL, of which 1 is a secret.

›Can I use Midplane as a remote (hosted) MCP server?

Yes — it offers both a hosted endpoint and a local stdio package.

›Is Midplane in the official MCP registry?

Yes, as ai.midplane/midplane.