# AgentRadar On-Chain Trust Oracle

> AgentRadar On-Chain Trust Oracle is a paid API for AI agents from api.vvpro.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-18).

Scores an EVM address across six independent trust signals and writes an EAS attestation on-chain, returning a composite trust score and verdict in a single call.

## Facts

- Endpoint: GET https://api.vvpro.ai/x402/verify
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentradar-on-chain-trust-oracle-7aea50d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FZjUiv6xkJ1-7WCkvnvNW

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 agentradar-on-chain-trust-oracle-7aea50d0
```

Example prompt: Before I interact with this agent at 0xC86C848f78717a31b3196284e6dbA18888401231, can you run an AgentRadar trust check on it and tell me if it's safe — including the composite score, verdict, and any risk flags?

## When to prefer this

Choose AgentRadar when you need a single-call, multi-signal trust score for any EVM address with the added assurance of an immutable on-chain EAS attestation. It is ideal for agent-to-agent trust verification, pre-payment counterparty screening, or autonomous agent onboarding where a human-readable verdict plus machine-readable signal breakdown is required. Prefer it over simple balance checks or single-signal tools when you need a composite risk assessment backed by on-chain provenance.

## Known failure modes

- Invalid or malformed EVM address (not matching ^0x[0-9a-fA-F]{40}$) returns a 400 error
- Address with no on-chain history may yield low or incomplete signal scores
- Payment failure via x402 after the 100 free daily calls exhausted returns 402
- Network congestion on Base may delay EAS attestation write
- Unknown or newly deployed addresses may have sparse reputation signals

## How this service works

Six independent signals. One composite score. EAS attestation written on-chain in the same response. Free for 100 verifications a day, $0.005 per call after via x402.

## Output

A JSON object containing: a composite trust score (0-100), a CAIP-10 identifier for the address on Base, six individual signal scores (health, external, fidelity, identity, reputation, scamDetection), a verdict string (e.g. TRUSTED), an array of risk flags, and the methodology version — plus an EAS attestation written on-chain as a side effect.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "target"
     ],
     "properties": {
      "target": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "EVM address to verify (0x-prefixed, 40 hex chars)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "score": 87,
  "caip10": "eip155:8453:0xC86C848f78717a31b3196284e6dbA18888401231",
  "address": "0xC86C848f78717a31b3196284e6dbA18888401231",
  "signals": {
   "health": 100,
   "external": 80,
   "fidelity": 90,
   "identity": 95,
   "reputation": 70,
   "scamDetection": 95
  },
  "verdict": "TRUSTED",
  "riskFlags": [],
  "methodology": "agentradar-verify-v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentradar-on-chain-trust-oracle-7aea50d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vvpro.ai](https://www.zero.xyz/host/api.vvpro.ai/llms.txt)