# Protocol Ledger

Protocol Ledger is a free, dated reference for five payment, agent-identity and token interfaces. Each record preserves its official specification, review date and interpretation limits. Filter the same snapshot in the browser or retrieve it through the JSON API.

- [Tool](https://protocol.agiscorecard.com/)
- [Method](https://protocol.agiscorecard.com/guide.html)
- [Worked examples](https://protocol.agiscorecard.com/examples.html)
- [Markdown reference](https://protocol.agiscorecard.com/guide.md)
- [Capabilities](https://protocol.agiscorecard.com/tool.json)
- [Input structure](https://protocol.agiscorecard.com/input.schema.json)
- [Privacy](https://protocol.agiscorecard.com/privacy.html)

Free beta. Version 1.3.0. Reviewed 2026-09-19. Five initial profiles; no market prices, exhaustive schema coverage, real-time protocol monitoring or paid endpoint.


## MCP integration

Endpoint: https://protocol.agiscorecard.com/mcp
Transport: Streamable HTTP; no authentication.
Setup and privacy: https://protocol.agiscorecard.com/for-agents.html
Search and fetch provide public citation references. Remote calculator inputs are sent to the server, unlike the local browser worksheet. Application code does not persist MCP arguments or results. Cite the public methodology without claiming it verifies user inputs.


## Current market and source context

- [Market context](https://web3.agiscorecard.com/market.html): reference prices with retrieval time and stale/unavailable state, not executable quotes.
- [Official-source watch](https://web3.agiscorecard.com/briefs.html): original links and publication dates; not independent verification.
- [Market JSON](https://web3.agiscorecard.com/api/market)
- [Source JSON](https://web3.agiscorecard.com/api/briefs)
- [RSS](https://web3.agiscorecard.com/updates.xml)
Never treat stale snapshots as live quotes. Do not infer actual payment or price movements from fictional worksheets.