Agent Verification Utility
A stateless synchronous A2A adapter that validates a prechecked paid intent, creates or reuses a quote bound to its receipt digest and spend policy, and returns exact x402 and MCP purchase instructions as a direct Message. It does not create Tasks or execute paid work without payment.
AgentCard object. It is an agent card in spirit rather than in schema — useful for
discovery, but an A2A client cannot assume it will parse.
no-protocolVersion
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://agent-economy.kgninja.dev/a2a
· transport JSONRPC
non-standard supportedInterfaces
Prepare JSON evidence verification prepare-json-evidence-verification
Revalidate a bounded request, spend policy, and precheck receipt digest; create or reuse an idempotent bound quote; and return exact x402 purchase instructions. Paid execution remains an explicit later step.
jsonverificationx402quote2026-09-19 from https://agent-economy.kgninja.dev/.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.