Tools
Free tools for people building on the A2A protocol. No account needed.
Agent Card validator
Checks an Agent Card against the A2A v1.0 specification: required fields, interfaces, skills, security schemes, HTTP caching headers and JWS signatures. Enter a domain, a URL or the card's JSON. Each result cites the spec section behind it and can be shared for 24 hours.
A2A endpoint tester
Reads an agent's card, sends one harmless SendMessage, one GetTask and one unknown method, and reports the response shapes, error codes and timings against the spec. Never sends your data to the agent.
Agent-readiness scanner
Scores a domain on what agents and crawlers can find: Agent Card, security.txt, llms.txt, robots.txt and sitemap. Every point is explained on the published rubric.
Agent Card generator
Fill in a form and get a valid A2A v1.0 Agent Card, plus a legacy v0.3 version, ready to copy or download. Runs in your browser.
.well-known generator
Starter files for /.well-known/agent-card.json, /.well-known/security.txt (RFC 9116) and /llms.txt. Runs in your browser.
Cost calculator
Compare what agent-originated contacts cost you today with direct agent-to-agent handling, using only numbers you enter. Export the result as CSV.