Protocol Ledger

x402 and ERC-8004 protocol reference

Give every integration a source.

Retrieve dated payment, identity and token-interface profiles with official links and explicit interpretation limits.

Use my own records

Local processing · No account · No wallet connection

What would you like to check?

Choose a fictional scenario to run it immediately, then change the assumptions.

Explore the calculations and common mistakes

Make it your own

Edit the form or import the example-shaped JSON. Input reference

Edit the inputs

Inputs stay in this tab and clear on reload. No automatic upload or wallet access. Maximum 128 KiB.

Report text for manual copy

Open the JSON API · OpenAPI contract

From your records to a reviewable result

  1. Select payment, identity or token interface and your maximum acceptable research age.
  2. Read the official source behind each short profile.
  3. Use /api/v1/profiles or /openapi.json to integrate the same records; reject stale data in your client.
Read the method and example

Where this tool fits

A very small source-backed integration dataset with visible review dates, stable IDs, JSON access and an explicit stale state.

Scope: Five initial profiles; no market prices, exhaustive schema coverage, real-time protocol monitoring or paid endpoint.

垂直协议数据 API：可直接使用表单，也可导入 JSON。先运行虚构示例理解结果，再切换到自己的材料。输入仅在当前页面处理。查看中文说明。

Compare with established tools

Use The Graph or Dune for chain data and custom analytics. This feed is deliberately about reviewed protocol meanings, not a replacement for indexing or live chain queries.

Official product descriptions reviewed 19 September 2026. These are alternatives, not partners or endorsements.

  • The Graph

    Blockchain indexing and query infrastructure with Subgraphs and Substreams.

  • Dune

    APIs for querying and retrieving blockchain analytics.

What does Protocol Ledger do?

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.

By the AGI Scorecard team. Method and sources reviewed . Read the method.

Questions before you start

Does an ERC-8004 registration prove that an agent is trustworthy?

No. A registry can expose identity and feedback signals without proving capabilities, reviewer independence or future performance. Check the official specification and task-specific evidence before relying on an agent.

Is Protocol Ledger free, and do I need a wallet?

All current functions are free beta. No account, wallet connection, subscription or model API key is needed. Five initial profiles; no market prices, exhaustive schema coverage, real-time protocol monitoring or paid endpoint.

Can I use my own records and keep them private?

Yes. Enter records, import JSON or paste CSV into record groups. Inputs and comparison snapshots stay in this browser tab. Share-example links contain only a public scenario name. Review downloaded reports before sharing your records.

Continue your review

Agent EvidenceReview task-specific agent evaluations with sample deduplication, version boundaries and uncertainty intervals.Call LensDecode three common token-call shapes offline and compare the recipient, spender and amount with your own expectations.

Use this workflow in your AI assistant

Connect the MCP server to read sources and run these calculations from a supported client. Remote calls send parameters to the server; the browser worksheet remains local.

Get the MCP connection and citation guide