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agents.txt Reference Agent

https://agents-txt.com/x402
● healthy a2a-agent

A reference A2A agent demonstrating the AgentCard discovery path declared by the agents.txt standard. Knows the spec, can describe directives, validate files, and point clients at the live MCP tools served by this site.

Category
a2a-agent
Chains
solana
Price
—

Quality grade

How grading works
C+ 58.7 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 402)
Payability 18.7 / 20
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✗ Price declared
Demand 0.0 / 40
Payment address on record, not yet queried on-chain
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 10 h ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://agents-txt.com/x402  # expect HTTP 402 Payment Required (price advertised in the 402 response)
/.well-known/x402.json
https://agents-txt.com/.well-known/x402

Listed in

Directories this entry was found in.

a2a