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DDG X402 Trust Probe
x402
DDG X402 Trust Probe is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Evaluates the trustworthiness of a paid x402 endpoint by probing its 402 challenge structure, liveness, on-chain settlement history, and sybil signals, returning a signed trusted/caution/untrusted verdict.
Price / call$0.01
Success—
StatusUnknown
How this service works
Machine-payable DDG services for AI agents. Current public live payment rails are x402 multi-chain USDC and direct-crypto auto/manual for public receiving-address families. MPP/Stripe/Tempo is installed but pending live provider env plus penny-settlement proof before any MPP-live advertisement. DDG sells bounded artifacts/results, not raw provider account access.
Output
A signed verdict object containing: trust rating (trusted/caution/untrusted), 402 challenge structure validation results, liveness latency metrics, on-chain settlement statistics (distinct payer count, recent settlement transaction count), sybil fan-out signal assessment, and optionally a signed PROBE PLAN detailing what would be purchased if payment were made.
Example use cases
Pre-integration vetting of unknown agent API
“I found a new x402 agent service at https://unknown-agent.io/v1/search that charges per call — can you probe it with a POST and JSON body and give me a signed trust verdict before I let my agent start paying it?”
Sybil detection for agent marketplace listing
“We're listing x402 services on our marketplace — can you check https://new-vendor.ai/v1/chat via POST for sybil fan-out signals and on-chain settlement history so we know if it has real paying users?”
Periodic trust re-check of known paid endpoint
“We've been using https://trusted-agent.example.com/v1/summarize for a while — can you run a fresh trust probe on it with settle_probe enabled so I can see the signed probe plan and confirm it's still behaving legitimately?”
Technical details
Endpoint
POSThttps://agents.daedalusdevelopmentgroup.com/v1/x402/trust-probe?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically vet an unknown or newly discovered x402 agent-payable service before committing funds or integrating it into an automated payment workflow. It is the right choice when you need a signed, multi-signal trust verdict combining protocol-level validation, liveness, and real on-chain settlement evidence — superior to manually inspecting 402 headers or checking a single signal.
Side effects
- Target endpoint is unreachable — returns error with liveness failure detail
- Target endpoint does not return a valid 402 response — verdict defaults to untrusted
- On-chain RPC query fails — settlement history unavailable, partial verdict returned
- settle_probe=true requested but endpoint 402 structure is malformed — probe plan cannot be generated
- Input schema missing required fields (type, method, bodyType, body) — returns 400 validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true
}
}Tags
x402
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