# x402 Oracle Full Trust Check

> x402 Oracle Full Trust Check is a paid API for AI agents from api.x402oracle.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Returns a comprehensive pre-payment trust verdict for an x402 endpoint, including health, latency, price drift, payTo drift, and monitoring history.

## Facts

- Endpoint: GET https://api.x402oracle.com/v1/check?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-oracle-full-trust-check-514de09a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-eQEybgZxQ0HfWPasMlhG

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-oracle-full-trust-check-514de09a
```

Example prompt: Before I pay to call https://api.someservice.com/data using a GET request, run a full trust check on it — confirm it's healthy, flag any price drift above $0.05, and make sure the payTo address is 0xAbC123...def456.

## When to prefer this

Use this endpoint when you need a full, comprehensive trust assessment before paying an x402 endpoint — including historical monitoring context, latency profiling, and multi-dimensional drift checks (price, payTo, chain). Prefer this over the sibling fast-check endpoint when you want the deepest available trust signal and have slightly more time budget, or when auditing a new or unfamiliar x402 endpoint for the first time. Ideal before committing to a higher-value or recurring payment.

## Known failure modes

- Invalid or non-https resource URL returns validation error
- Endpoint is unreachable — health check fails with liveness error
- Price exceeds maxUsdPrice ceiling — trust verdict is negative
- PayTo address does not match expectedPayTo — drift alert returned
- Stale monitoring data exceeds maxAgeSeconds — freshness failure
- Malformed wallet address in expectedPayTo returns schema validation error
- x402 endpoint returns unexpected response format — parsing error

## How this service works

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## Output

A comprehensive trust verdict object including: overall trust decision, endpoint health/liveness status, measured latency, price drift (actual vs expected), payTo wallet address drift, chain drift, freshness of the verdict, and historical monitoring data for the checked x402 endpoint.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "resource"
     ],
     "properties": {
      "resource": {
       "type": "string",
       "pattern": "^https://",
       "maxLength": 2048,
       "minLength": 1,
       "description": "Absolute https x402 endpoint URL to check before sending payment."
      },
      "maxUsdPrice": {
       "type": "string",
       "description": "Optional non-negative USD price ceiling for the checked endpoint."
      },
      "expectedPayTo": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "Optional expected receiving wallet address for drift checks."
      },
      "maxAgeSeconds": {
       "type": "string",
       "description": "Optional non-negative integer freshness limit for the trust decision."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "schema": {
     "type": "object"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "v": 1,
  "price": {
   "usd": 0.001,
   "vsLow": 0,
   "currency": "USDC",
   "distinct": 1,
   "changed24h": false,
   "rangeRatio": 0,
   "changeCount": 0,
   "lastChangeAgeSeconds": null
  },
  "score": 0.96,
  "stale": false,
  "config": {
   "chain": {
    "value": "base-mainnet",
    "distinct": 1,
    "changed24h": false,
    "changeCount": 0,
    "lastChangeAgeSeconds": null
   },
   "payTo": {
    "value": null,
    "distinct": 0,
    "changed24h": false,
    "changeCount": 0,
    "lastChangeAgeSeconds": null
   },
   "currency": {
    "value": "USDC",
    "distinct": 1,
    "changed24h": false,
    "changeCount": 0,
    "lastChangeAgeSeconds": null
   }
  },
  "history": {
   "complete": true,
   "windowSeconds": 2592000,
   "targetWindowSeconds": 2592000
  },
  "reasons": [],
  "decision": "allow",
  "liveness": {
   "successRate": 0.996,
   "p95LatencyMs": 540,
   "lastLatencyMs": 410,
   "consecutiveFailures": 0
  },
  "resource": "https://api.anchor-x402.com/v1/price/token",
  "subscores": {
   "D": 1,
   "F": 0.901,
   "L": 0.996
  },
  "ageSeconds": 78,
  "observedAt": "2026-06-10T00:00:00.000Z",
  "review_count": 0,
  "review_rating": null,
  "last_reviewed_at": null,
  "verified_reviews": 0,
  "freshnessAgeSeconds": 30,
  "has_verified_reviews": false,
  "weighted_review_rating": null
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-oracle-full-trust-check-514de09a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402oracle.com](https://www.zero.xyz/host/api.x402oracle.com/llms.txt)