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UTA Trust API – Agent Trust Card Verifier
x402
UTA Trust API – Agent Trust Card Verifier is a paid API for AI agents from uta-trust-api.eddyflores100.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Verifies an Agent Trust Card (ATC/1.0) via Ed25519 signature validation, returning a risk score and per-stage verification results for trust anchor, validity window, and signature
Price / call$0.01
Success—
StatusUnknown
How this service works
Agent trust verification (ATC/1.0) as a paid x402 resource on Base Mainnet and Base Sepolia. Real Ed25519 verification at the edge; settlement via production facilitators (mainnet: PayAI; testnet: x402.org) with EIP-3009.
Output
A JSON object containing: 'verified' (boolean), 'risk' (e.g. 'low'), 'payer' (Ethereum address), 'digest' (SHA-256 hex of the payload), 'reason' (null on success or an error string), 'protocol' ('ATC/1.0'), and 'stages' with pass/fail results for 'trust_anchor', 'validity_window', and 'signature_verification'.
Example use cases
Gate agent access in a multi-agent system
“Before my orchestration agent hands off a task to this sub-agent, verify its ATC/1.0 trust card — give me the risk level and confirm that the trust anchor and signature both pass.”
Audit trail for autonomous agent transactions
“I need to verify and log the trust card for the agent that just submitted this action — run it through ATC/1.0 verification and return the SHA-256 digest and payer address so I can record them.”
Real-time trust check before payment release
“Before releasing funds, verify this agent's trust card using the ATC/1.0 protocol — I need to confirm the signature is valid and the risk comes back as low.”
Technical details
Endpoint
POSThttps://uta-trust-api.eddyflores100.workers.dev/v1/trust/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need cryptographic, ATC/1.0-compliant Ed25519 verification of an AI agent's trust card with a structured per-stage breakdown (trust anchor, validity window, signature). Prefer it over generic JWT or OAuth checks when operating in a Web3 / Base network context and when on-chain payment settlement via EIP-3009 is acceptable. It is especially suited for agent-to-agent trust establishment in multi-agent pipelines where a verifiable risk score and payer address are required.
Side effects
- Invalid or malformed ATC/1.0 card returns verified: false with a reason string
- Expired validity window causes validity_window stage to fail
- Bad Ed25519 signature causes signature_verification stage to fail
- Payment failure (insufficient USDC or wrong network) blocks the request entirely
- Malformed hex in signature.value field returns a parse error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| card | object | Agent Trust Card ATC/1.0 (payload + signature.value hex) |
Output
Schema · Response
{
"type": "json",
"example": {
"risk": "low",
"payer": "0x…",
"digest": "<sha256 hex>",
"reason": null,
"stages": {
"trust_anchor": "pass",
"validity_window": "pass",
"signature_verification": "pass"
},
"protocol": "ATC/1.0",
"verified": true
}
}Tags
x402
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