Pre-interaction risk signals for any EVM contract/token address. USDC on Base via x402.
Pay from $0.005 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
ASSESSMENT
updated 2h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 380ms
- avg response
- 380ms
- total checks
- 1
compliance A (11/12)
11 of 12 x402 conformance checks pass. Full checklist below.
price $0.005 (p63 in Blockchain)
- price (min)
- $0.005
- category percentile (min)
- p63 in Blockchain
- category percentile (max)
- p25 in Blockchain
- endpoints / prices
- 1 / 1
- model
- flat
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
WHAT IT DOES
ai-derivedChecks pre-interaction risk signals for EVM contracts and tokens conf 100%
- category
- blockchain-risk conf 100%
- in
- body
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET |
|---|---|---|---|---|---|
| POST | /check | $0.005 | Base | USDC |
REQUEST / RESPONSE EXAMPLE
An unpaid request to POST /check returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i -X POST 'https://eltociear-contract-guard.hf.space/check'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5bCDA55247B238a573A968B234F788a2D35664Dd",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://eltociear-contract-guard.hf.space/check",
"mimeType": "application/json",
"description": "Risk check for an EVM contract/token address"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"chain": "base",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"chain": "base",
"flags": [
"..."
],
"token": {
"name": "USD Coin",
"symbol": "USDC",
"decimals": 6
},
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"is_proxy": true,
"risk_level": "HIGH",
"risk_score": 40,
"is_contract": true
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [
"address"
],
"properties": {
"chain": {
"enum": [
"base",
"ethereum"
],
"type": "string",
"description": "Chain (default base)"
},
"address": {
"type": "string",
"description": "EVM contract/token address (0x...)"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}
] UPTIME
RECENT CHECKS
OVER TIME
All charts share the 30d window selected here. Every series is also served as JSON at /api/v1/services/contract-guard-api/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted).
COMPLIANCE
11/12 checks pass · grade A- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- response mimeType declared
- served over HTTPS
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