Install Focxle (retired listing): see com.focxle/b2b-agent-negotiation-governance in Goose

What you need first

• Goose, installed.
• Nothing else: the server runs on its publisher's machines and Goose connects to it.

Steps

1. Open ~/.config/goose/config.yaml. On Windows it is %APPDATA%\Block\goose\config\config.yaml.
2. Add this entry. If the file already has extensions, add only the entry inside it.

extensions:
  "agent-payments-virtual-cards":
    type: streamable_http
    name: "agent-payments-virtual-cards"
    enabled: true
    uri: "https://focxle.com/api/v1/mcp/cards"
    headers: {}
    env_keys: []
    envs: {}
    timeout: 300

3. Save the file and start a new Goose session.

Check it worked

Ask Goose: List the tools of agent-payments-virtual-cards.

If it does not start

401 Unauthorized

The endpoint wants a sign-in or a key. Sign in when Goose asks.

Nothing changes after a restart

The file is not valid YAML any more. Check that the entry is indented like the lines around it.