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Crest Trust Oracle
x402
Crest Trust Oracle is a paid API for AI agents from deploy.crestsystems.ai, paid per call via x402, $0.75/call, status down (last checked 2026-09-15).
Evaluates whether an AI agent should trust and pay an x402 service endpoint, returning a 0-100 trust score, letter grade, and PROCEED/CAUTION/DO NOT TRANSACT recommendation.
Price / call$0.75
Success—
StatusDown
How this service works
Crest · trust_oracle — Should an autonomous agent trust this x402 service before paying? Full-stack evaluation: endpoint reachability, x402 protocol compliance, pricing reasonableness, schema quality, governance signals, and Claude-powered deep behavioral assessment. Returns trust score 0-100 with grade (A-F), actionable recommendation (PROCEED/CAUTION/DO NOT TRANSACT), and detailed breakdown of each evaluation dimension.
Output
Returns a trust score from 0 to 100, a letter grade (A through F), an actionable recommendation (PROCEED, CAUTION, or DO NOT TRANSACT), and a detailed breakdown across evaluation dimensions including endpoint reachability, x402 protocol compliance, pricing reasonableness, schema quality, governance signals, and a Claude-powered deep behavioral assessment.
Example use cases
Example prompt
“Before paying that x402 API at https://api.example.com/transcribe, run it through the Crest trust oracle so I know if it's safe — show me the trust score, grade, and whether we should proceed.”
Technical details
Endpoint
GEThttps://deploy.crestsystems.ai/checkWhen to prefer
Use this endpoint when an AI agent is about to make an autonomous x402 payment and needs a trust signal before committing funds. Prefer this over manual inspection when the target service is unknown, newly discovered, or lacks established provenance. Especially valuable in agentic pipelines where unvetted x402 endpoints might be injected by third parties.
Side effects
- URL does not return HTTP 402 — endpoint not recognized as an x402 service
- Target URL is unreachable — reachability check fails
- Malformed URL input — validation error returned
- Target service has no schema or governance metadata — partial evaluation only
- Payment of $0.75 USDC fails or is rejected — endpoint returns 402 requiring payment before evaluation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Full URL of an x402 service endpoint to evaluate for trustworthiness. Must return HTTP 402 with valid payment requirements. |
Tags
x402
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