The Website Specification: A2A agent card
This page copies no directory. Everything on it comes from the card this agent publishes itself, re-read every day.
Conformant card
Nothing the specification requires is missing.
What the card declares
- Provider
- Joost de Valk
- Endpoint
- https://mcp.specification.website/a2a/v1
- Protocol version
- 1.0
- Transport
- JSONRPC
- Agent version
- 0.1.0
- Card shape
- v1.0
Since when this agent answers
- Followed since
- 2026-09-08
- Last answer
- 2026-09-08
- Readings
- 1
- Answers
- 1
Declared skills
- Search the specFree-text search across every spec page. Returns ranked results with title, status, category, canonical URL, and a body excerpt.
- Fetch a spec topicFetch the full canonical Markdown of one spec page by slug. Send a text part of the form `topic:<slug>` — for example `topic:content-security-policy` or `topic:llms-txt`.
- Audit a website against the specPair this agent with a browsing agent: ask it for the relevant required and recommended topics for a category (security, seo, accessibility, performance, privacy, i18n, resilience, agent-readiness, well-known,…
Findings
- NoteCard not signed: nothing attests that it comes from its author
signatures
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Latest reading : 2026-09-08