Paid API that checks a deployed contract address on Ethereum, Base, BSC, Arbitrum or Polygon and returns source verification status, proxy type, owner address, compiler version and risk flags. $0.05 per call via x402.
Pay from $0.05 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.
ASSESSMENT
updated 4h 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
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 1459ms
- avg response
- 940ms
- total checks
- 47
compliance A (11/11)
11 of 11 x402 conformance checks pass. Full checklist below.
price $0.05 (p79 in Blockchain)
- price (min)
- $0.05
- category percentile (min)
- p79 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.
traction $1.53 30d · 2 buyers
- volume 30d
- $1.53
- buyers 30d
- 2
- settlements 30d
- 13
- last settlement
- 2026-07-21
- top buyer share
- 63% of 30d volume
- trend 7d vs 30d
- 0.40x the 30d daily rate
- networks
- eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
Attributed pro-quota: this payout address is shared, so volume and buyers are the operator-level figure divided by the services sharing it. A declared convention, not an individually observed measure, and still a conservative undercount.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedVerifies blockchain contracts on the Base network
- category
- blockchain-verification
- in
- query params
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET |
|---|---|---|---|---|---|
| GET | /verify | $0.05 | Base/Solana | USDC |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /verify returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://contract.lonestaroracle.xyz/verify'
// 402 response (captured by monitor) · 1 payload · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x52Ab53912D37759B2ad364f22dD06B16714b6C06",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"payTo": "3nmeVj5m9Uq2hSTfsVsn3tJMHRJQNMKR1AjzyUJbrSgw",
"amount": "50000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://contract.lonestaroracle.xyz/verify",
"tags": [
"contract",
"security",
"honeypot",
"rug-pull",
"defi"
],
"iconUrl": "https://lonestaroracle.xyz/lso_logo.svg",
"mimeType": "",
"description": "Smart contract verification and security analysis on Ethereum Base BSC Arbitrum Polygon",
"serviceName": "LoneStarOracle ContractCheck"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "eth",
"address": "example"
}
},
"output": {
"type": "object",
"format": "json",
"example": {
"name": "USD Coin",
"chain": "eth",
"symbol": "USDC",
"address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"summary": "USDC (USD Coin) on ETH: Risk 0/10 (clean) | No flags",
"cex_list": [
"Binance",
"Coinbase"
],
"is_proxy": true,
"cex_listed": true,
"dex_listed": true,
"risk_flags": [],
"risk_label": "clean",
"risk_score": 0,
"trust_list": true,
"buy_tax_pct": 0,
"is_honeypot": false,
"is_mintable": false,
"hidden_owner": false,
"holder_count": 6899288,
"sell_tax_pct": 0,
"is_open_source": true,
"has_selfdestruct": false
}
}
},
"schema": {
"name": "LoneStarOracle — ContractCheck",
"tags": [
"contract",
"security",
"honeypot",
"rug-pull",
"defi",
"token",
"audit"
],
"type": "object",
"version": "1.0.0",
"category": "blockchain",
"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",
"properties": {
"chain": {
"type": "string",
"title": "Chain",
"default": "eth"
},
"address": {
"type": "string",
"title": "Address"
}
}
}
}
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"name": "USD Coin",
"chain": "eth",
"symbol": "USDC",
"address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
"summary": "USDC (USD Coin) on ETH: Risk 0/10 (clean) | No flags",
"cex_list": [
"Binance",
"Coinbase"
],
"is_proxy": true,
"cex_listed": true,
"dex_listed": true,
"risk_flags": [],
"risk_label": "clean",
"risk_score": 0,
"trust_list": true,
"buy_tax_pct": 0,
"is_honeypot": false,
"is_mintable": false,
"hidden_owner": false,
"holder_count": 6899288,
"sell_tax_pct": 0,
"is_open_source": true,
"has_selfdestruct": false
}
}
}
},
"description": "AI-powered smart contract security audit. Scans for honeypots, rug functions, hidden ownership, tax manipulation, and 15+ risk vectors via GoPlus, then generates a plain-English Claude AI verdict explaining the flags and whether the contract is safe to interact with. Returns risk score 0-10, all active flags, token metadata, and an actionable AI assessment. Supports Ethereum, Base, BSC, Arbitrum, Polygon."
}
},
"bc_kg64bd18": {}
},
"x402Version": 2
}
] UPTIME
RECENT CHECKS
OVER TIME
All charts share the 7d window selected here. Every series is also served as JSON at /api/v1/services/lonestaroracle-contractcheck/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).
Shared payout address (45 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service figure is attributed, the assessment block and the ranking, it is the address total divided pro-quota by the 46 services sharing it: a declared convention, not an individually observed measure.
Shared payout address (45 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service buyer count is attributed, the assessment block and the ranking, it is divided pro-quota by the 46 services sharing the address and can be fractional: a declared convention, not an individually observed measure.
COMPLIANCE
11/11 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
- served over HTTPS
EMBED THIS BADGE
<a href="https://x402-list.com/services/lonestaroracle-contractcheck?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/lonestaroracle-contractcheck.svg" alt="LoneStarOracle ContractCheck listed on x402-list" height="28"> </a>
[](https://x402-list.com/services/lonestaroracle-contractcheck?utm_source=badge&utm_medium=referral&utm_campaign=embed)
<a href="https://x402-list.com/services/lonestaroracle-contractcheck?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/lonestaroracle-contractcheck.svg?data=uptime" alt="LoneStarOracle ContractCheck uptime on x402-list" height="28"> </a>