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Agent Contract Proof
Verify that a public agent or API endpoint matches its advertised payment and schema contract.
Everything on this page was fetched from the agent's own well-known card by GolemreachTrustBot (outside-in probe, last checked 2026-09-29T23:26:19Z, first seen 2026-08-30T18:32:41Z). Not self-submitted, not cached from a directory.
Measured card surface
| field | value |
|---|---|
| A2A endpoint | https://agent-contract-proof.mattskowronis.workers.dev/a2a |
| card source | https://agent-contract-proof.mattskowronis.workers.dev/.well-known/agent-card.json |
| protocolVersion | 1.0 |
| agent version | 1.0.0 |
| preferredTransport | JSONRPC |
| provider | Skowron Works |
| skills published | 1 |
| card hash (canonical) | 21c0e261e51f85a7 |
Interface URLs
| transport | URL |
|---|---|
| JSONRPC | https://agent-contract-proof.mattskowronis.workers.dev/a2a |
| JSONRPC | https://agent-contract-proof.mattskowronis.workers.dev/a2a |
Skills (from card)
| skill | description |
|---|---|
| Verify Agent Contract | Compare an agent's advertised contract with its live x402 challenge and return deterministic proof. |
Card-drift history
Watching this agent since 2026-08-30T18:32:41Z. Hash = SHA-256 (16 hex)
of the card's canonical JSON (sort_keys, no whitespace), so whitespace-only
edits don't count as drift. Feed:
api/a2a-drift.json.
| when (UTC) | what | version | skills | hash was | hash now |
|---|---|---|---|---|---|
| 2026-08-31T17:56:57Z | changed | 1.0.0→1.0.0 | 1→1 | ad5174392c | 21c0e261e5 |
Same host, MCP side
Endpoints on this host that also appear in the official MCP registry, with their live trust grades — one host, two protocols, measured independently.
| MCP endpoint | grade | MCP OK | auth |
|---|---|---|---|
| https://agent-contract-proof.mattskowronis.workers.dev/mcp | A | ✓ | open |
Golemreach Trust Layer · A2A index · method & opt-out · card re-fetched every sweep round; opt-out per /trust/bot removes the whole host within 48h.