Agent Skills

Prove AI work happened

Use this skill when someone asks whether a tool call ran, wants to verify an output, or needs an audit trail to show someone else.

Install
mkdir -p ~/.claude/skills/receipt && curl -sL https://zambo.dev/skills/receipt/SKILL.md -o ~/.claude/skills/receipt/SKILL.md

Honesty contract

A verifiable receipt proves a specific tool ran with specific inputs at a specific time, and that the quoted output is byte exact. It does not prove the output is correct or prove anything outside the recorded call.

AER-1 is an open draft spec for AI work receipts.

Version 1.0.0. Read the raw SKILL.md · Read receipts reference · Install the flagship skill

For developers and agents

Zambo gives AI work a receipt you can check. For people: add Zambo to your AI app and ask for a job. These technical links are for developers and AI agents. One hosted MCP at https://zambo.dev/mcp. Check the proof for recorded tool calls (verify a receipt). Agents: 24-hour Day Pass, $0.99 USDC on Base via x402, not per call. People: Zambo Pass $29/mo or $290/yr; holder pass $19/mo for verified $ZAMBO holders.

Start here: For AI agents · Add Zambo · Check a receipt · Answers · Guides · What a receipt is · Open receipt format (draft) · All tools · Pricing · Day Pass: $0.99 · Agent Day Pass · Switch AIs without losing your work · Connect your AI · Founder · Source code
Brennan on X · Zambo on X