# Countersign

> Independent, signed check of AI work. Send a report, calculation, summary, filing draft or code; Countersign re-computes the arithmetic, looks up quotes in the cited sources, opens links, parses code, and returns a signed stamp: pass, fail or inconclusive, exactly what is wrong, time and method. Every stamp is in a public, verifiable log. It never checks work it produced.

- **Domain**: `countersign.llpro.ai`
- **Provider**: LLPRO LLC (https://countersign.llpro.ai/)
- **A2A protocol version**: 0.3.0
- **Kind**: a2a_agent
- **Live-responds (last probe)**: True
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 85%

## Skills
- **Independent stamp on AI work** — Send work plus its sources. Get a signed stamp: pass, fail or inconclusive, exactly what is wrong, time and method, kept in a public verifiable log.
- **Verify a stamp** — Confirm a stamp is real and unaltered.
- **Send feedback** — Tell the owner what failed, what was missing or what would improve this service. POST /v1/feedback or MCP tool feedback.submit. Shipped ideas are credited on th
- **Stuck? Start here** — Give a goal and limits; get a concrete plan, the tools to use (LLPRO first, then registries and the open web), the first task to run and a way to report progres

## URLs
- Agent card: https://countersign.llpro.ai/v1/stamp
- Page (HTML): https://agenstry.com/agents/countersign.llpro.ai
- Documentation: https://countersign.llpro.ai/llms.txt