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Agent Guild Evidence Bundle
x402
Agent Guild Evidence Bundle is a paid API for AI agents from agent-guild-5d5r.onrender.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-29).
Issues a signed, offline-verifiable evidence bundle (AGD-1/AGPD-1) for a target agent endpoint, including cryptographic proof, ledger anchor, and policy decision.
Price / call$0.1
Success—
StatusUnknown
How this service works
Machine-payable trust and payment-safety APIs for autonomous agents: rank counterparties before delegation, screen wallets before USDC settlement, buy signed AGD-1/AGPD-1 decisions, seal authenticated machine messages, and retain offline-verifiable evidence. Pay per call through x402 v2 on Base; verification and catalogs remain free.
Output
Returns an AgentGuildEvidenceBundle v2 JSON object containing: an Ed25519-signed proof, the issuer DID (did:key:), a ledger anchor with snapshot SHA-256 and checkpoint entry, a 32-hex-character commitment nonce, the subject and requested endpoint URIs, a bundle SHA-256 hash, a policy decision, observation checks and verdict, corroboration sources, validity window (issued_at / valid_until), and SDK references for offline verification.
Example use cases
Pre-delegation trust attestation
“I'm about to delegate a task to the agent at https://agent.example/tasks — can you get me an Agent Guild evidence bundle with a signed policy decision and ledger anchor before I hand anything over?”
USDC settlement safety evidence
“We're settling 500 USDC with a counterparty agent at https://counterparty.example/a2a — grab me a signed AGD-1 evidence bundle for that endpoint so we have tamper-proof proof of the trust check on record.”
Audit-ready agent interaction record
“For our compliance log, generate an Agent Guild evidence bundle for https://vendor-agent.example/submit, including the commitment nonce and bundle SHA-256, so we can verify offline later that we checked this agent before the interaction.”
Technical details
Endpoint
POSThttps://agent-guild-5d5r.onrender.com/evidence/bundle?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need an offline-verifiable, cryptographically signed record that a specific agent endpoint was evaluated before delegation, payment, or sensitive interaction — especially when you need a ledger anchor and DID-keyed proof that can be independently verified without calling Agent Guild again. Prefer this over real-time trust ranking endpoints when auditability, compliance, or dispute resolution requires a durable, tamper-evident artifact.
Side effects
- Invalid or unreachable subject endpoint URI — bundle cannot be generated
- Missing required body fields (type, method, bodyType, body) — 400 validation error
- Payment failure via x402 v2 on Base — 402 payment required
- Unknown or unresolvable endpoint — no prior observations, low corroboration
- Ed25519 signing failure — internal server error
- Rate limiting or service unavailability on Render.com hosting
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"type",
"version",
"requested_endpoint",
"commitment_nonce",
"subject_endpoint",
"issuer",
"ledger_anchor",
"proof",
"bundle_sha256"
],
"properties": {
"type": {
"type": "string",
"const": "AgentGuildEvidenceBundle"
},
"proof": {
"type": "string"
},
"issuer": {
"type": "string",
"pattern": "^did:key:"
},
"version": {
"type": "integer",
"const": 2
},
"bundle_sha256": {
"type": "string"
},
"ledger_anchor": {
"type": "object",
"required": [
"snapshot_sha256",
"checkpoint_entry",
"inclusion"
]
},
"commitment_nonce": {
"type": "string",
"pattern": "^[0-9a-f]{32}$"
},
"subject_endpoint": {
"type": "string",
"format": "uri"
},
"requested_endpoint": {
"type": "string",
"format": "uri"
}
}
},
"example": {
"type": "AgentGuildEvidenceBundle",
"proof": "example-ed25519-proof",
"issuer": "did:key:z6MkExampleAgentGuildIssuer",
"policy": {
"decision": "allow"
},
"history": {
"drift": [],
"observations": 4
},
"version": 2,
"audience": null,
"issued_at": "2026-08-13T08:00:00+00:00",
"subject_id": "sha256:example",
"observation": {
"checks": [],
"failed": [],
"verdict": "pass"
},
"valid_until": "2026-08-13T09:00:00+00:00",
"verification": {
"note": "illustrative shape only; example signatures are not valid",
"suite": "Ed25519",
"python_sdk": "/sdk/agentguild_verify.py",
"javascript_sdk": "/sdk/agentguild_verify.mjs"
},
"bundle_sha256": "efefefefefefefefefefefefefefefefefefefefefefefefefefefefefefefef",
"corroboration": {
"independent_sources": 2
},
"ledger_anchor": {
"head_hash": "sha256:example",
"inclusion": {},
"snapshot_sha256": "abababababababababababababababababababababababababababababababab",
"checkpoint_entry": {},
"checkpoint_index": 123
},
"commitment_nonce": "00000000000000000000000000000000",
"subject_endpoint": "https://agent.example/a2a",
"requested_endpoint": "https://agent.example/a2a?task=example"
}
}Tags
x402
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