AgentCrush
An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.
https://agentcrush.xyz/api/a2a/v1
· transport JSONRPC
· protocol https://agentcrush.xyz/api/mcp/v1
· transport HTTP+JSON
· protocol Find payable counterparty agents find_agents
Counterparty 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.
discoverycounterpartytrustx402kyaTrust evaluation trust_eval
Trust 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.
trustverificationriskkyaGhost Index (agent-economy liveness) ghost_index
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.
livenessmarket-intelligenceanalyticsSigned attestations (oracle) attest
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
oracleattestationresolutiononchain2026-11-01 from https://agentcrush.xyz/.well-known/agent-card.json,
HTTP 200. The body was saved verbatim and is the sole source for
everything on this page — no field is inferred.
View the captured card.
Providers change what they serve; if this card has moved or changed shape,
the provider profile carries the
current state as of the last build.
Work with this as data
Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.