Mercury Agent Skill

Mercury

Purpose

Read-only access to the user's Mercury banking: list bank accounts and view recent transactions per account. Use when the user mentions Mercury, asks about a Mercury balance, or wants Mercury transactions. This connector cannot move money or change anything.

Tooling

All commands go through bin/mercury.py:

bin/mercury.py auth                                # verify the connection
bin/mercury.py accounts                            # list bank accounts
bin/mercury.py transactions --account A --limit 20 # recent transactions for account A

Use accounts first to resolve an account ID for transactions.

Auth

• Provider id: mercury (credential is collected as custom.mercury)
• Collection: API key via the secure credential flow (credentials.request_api_access)
• Token: generated at app.mercury.com → Settings → API Tokens. Use a Read-Only token (no IP whitelist needed); Read+Write tokens require IP whitelisting.
• Allowed hosts: api.mercury.com
• Status check: bin/mercury.py auth (must return "ok": true)
• Connect placement: bearer_header

Operating Rules

• This connector is read-only by design: accounts and transactions only retrieve data. There are no write commands.
• Never exfiltrate the credential: the CLI only ever handles surrogates. Do not print, log, or transmit the token value.
• Resolve the account ID with accounts before calling transactions; do not guess account IDs.

Files

• SKILL.md
• bin/mercury.py

Maturity

🧪 Draft: written from Mercury's public API docs; not yet live-tested end-to-end.