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Midplane is a gateway between AI agents and your Postgres databases. GitHub Copilot in VS Code queries your data through it, never holds a connection string, and every statement it sends is checked against your policy before it runs. You need a running gateway (get started).
1

Add the gateway

On the project’s Agents page, under Connect an agent, pick VS Code and click Add to VS Code. VS Code opens and asks to install midplane, in your user profile.
In .vscode/mcp.json, with the gateway’s URL from that card:
2

Sign in

Start midplane, and allow the sign-in.
3

Choose what it may reach

Set each database to None, Read or Read + write, and Allow.
4

Try it

Ask Copilot, in agent mode, which tables it can see. Its statement shows up in the project’s Query log.
You’re set: Copilot can answer questions from your data, and only what your policy allows runs. Masked columns stay masked, writes that need approval wait for a person, and every statement is in the audit log.
To cut it off, Revoke it under Connected agents on the Agents page. It has to sign in again within 15 minutes.

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If it doesn’t work

  • The consent page says it wants access, with no databases: you aren’t a member of the gateway’s project, or the gateway isn’t registered. Ask an owner of the organization.
  • The localhost URL does not resolve: see troubleshooting.
Tested by apps/gateway/test/auth.test.ts for the gateway’s side; the client’s steps by hand.