Can other agents read your agent card?

An agent introduces itself with a card published at /.well-known/agent-card.json. It is the only document another agent reads before deciding to call you. This tool fetches it, checks it against the specification, and shows you the detail.

Readable card, points to review

No required field is missing, but some points deserve attention.

What the card declares

Name: AgentCrush
Provider: AgentCrush
Agent version: 1.0.0
Protocol version: 0.3.0
Transport: JSONRPC
Endpoint: https://agentcrush.xyz/api/a2a/v1
Card shape: pre-v1.0
Location: standard location
Skills: 4
Response time: 70 ms

Findings

WarningCard written in the shape used before v1.0 of the protocol
NoteCard not signed: nothing attests that it comes from its authorsignatures
Noteurl moved to supportedInterfaces[0].url in v1.0url
NoteprotocolVersion moved to supportedInterfaces[].protocolVersion in v1.0protocolVersion
NotepreferredTransport moved to supportedInterfaces[0].protocolBinding in v1.0preferredTransport
NoteadditionalInterfaces moved to supportedInterfaces[] in v1.0additionalInterfaces

Declared skills

Find payable counterparty agentsCounterparty discovery: which agents can do X and are safe to pay. Returns ranked candidates with liveness (30-day Ghost Index rule), evidence tier, verified payment rails (x402/MCP/ERC-8004), scores, and endpoints. Top 3 free via this A2A endpoint or GET /api/agents/find; full ranked list (up to 50) is $0.05 via x402 at /api/agents/find/full or free with an AgentCrush Pro key.
- discovery
- counterparty
- trust
- x402
- kya
Trust evaluationTrust verdict for one indexed agent: verdict, confidence tier, liveness, risk flags, claim status. Standard depth free; full depth with raw signal breakdown is $0.10 via x402 at /api/trust/evaluate/full.
- trust
- verification
- risk
- kya
Ghost Index (agent-economy liveness)What share of indexed AI agents shows signs of life. Daily snapshot, free, CORS-open, history available. The base-rate every agent-economy decision should price in.
- liveness
- market-intelligence
- analytics
Signed attestations (oracle)Ed25519-signed, timestamped statement over index data (agent liveness, tier, Ghost Index), referencing the daily Proof-of-Index digest anchored on Base. Built for prediction-market resolution and counterparty checks. $0.25 via x402 at GET /api/oracle/attest, free with a Pro key. Verification cookbook: https://agentcrush.xyz/oracle
- oracle
- attestation
- resolution
- onchain

Show the result

This badge follows your readings: it changes when your card changes. Paste it in your README.

Markdown

[![A2A card](https://kopass.app/a2a/badge/aHR0cHM6Ly9hZ2VudGNydXNoLnh5eg.svg)](https://kopass.app/a2a/validator?url=https://agentcrush.xyz)

HTML

<a href="https://kopass.app/a2a/validator?url=https://agentcrush.xyz"><img src="https://kopass.app/a2a/badge/aHR0cHM6Ly9hZ2VudGNydXNoLnh5eg.svg" alt="A2A card" height="20"></a>

The rules come from the protocol's specification/a2a.proto file, where every required field is marked as such. Nothing is added.

Cards read here feed the KoPass daily reading: 225 agents followed, 217 of which answered on the last pass.

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