NFT Insight (Scam Check, Owners)
35 APIs and 182 operations your agent can buy one call at a time. $0.01–$0.05 per call in USDC on base via x402. No API key, no account, no subscription.
TradingLiveeip155:8453Exactvia cdp
NftEthereumScam-checkOwnershipCollections
Settlements · 30d
118↑ 538%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$4.34
Verified settled volume
329 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-07-20 23:46Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x54ebFCF3870439B9db62381848c5DabC05c70d5BThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
],
"resource": {
"url": "https://x402.professorsausages.com/nft/:chain/collection/:address/wash-check",
"tags": [
"nft",
"ethereum",
"scam-check",
"ownership",
"collections"
],
"mimeType": "application/json",
"description": "Collection wash-trade heuristics: verdict + per-rule evidence over ≤300 recent sales (window cached ≤24h, verdict computed fresh)",
"serviceName": "NFT Insight (Scam Check, Owners)"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "object",
"required": [
"chain",
"address",
"verdict",
"patterns",
"window",
"checks_run",
"not_checked",
"method",
"disclaimer",
"freshness"
],
"properties": {
"chain": {
"type": "string"
},
"method": {
"type": "string"
},
"window": {
"type": "object",
"properties": {
"to_block": {
"type": [
"integer",
"null"
]
},
"from_block": {
"type": [
"integer",
"null"
]
},
"sales_analyzed": {
"type": "integer"
}
}
},
"address": {
"type": "string"
},
"tokenId": {
"type": "string"
},
"verdict": {
"enum": [
"NO_WASH_PATTERNS_DETECTED",
"PATTERNS_CONSISTENT_WITH_WASH_TRADING",
"NO_SALES_DATA"
],
"type": "string"
},
"patterns": {
"type": "array",
"items": {
"type": "object",
"required": [
"rule",
"detail",
"evidence"
],
"properties": {
"rule": {
"enum": [
"round_trip",
"pair_churn",
"self_purchase"
],
"type": "string"
},
"detail": {
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object",
"properties": {
"block": {
"type": [
"integer",
"null"
]
},
"txHash": {
"type": [
"string",
"null"
]
},
"tokenId": {
"type": [
"string",
"null"
]
}
}
}
}
}
}
},
"freshness": {
"type": "object",
"required": [
"tier",
"max_age_seconds",
"as_of"
],
"properties": {
"tier": {
"enum": [
"cached",
"live"
],
"type": "string"
},
"as_of": {
"type": "string",
"description": "ISO timestamp of the upstream data capture."
},
"max_age_seconds": {
"type": "integer",
"description": "86400 on the cached tier, 0 on live."
}
}
},
"checks_run": {
"type": "array",
"items": {
"type": "string"
}
},
"disclaimer": {
"type": "string"
},
"not_checked": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
},
"schema": {
"type": "object",
"required": [
"input"
],
"properties": {
"input": {
"type": "object"
},
"output": {
"type": "object"
}
}
},
"category": "nft",
"routeTemplate": "https://x402.professorsausages.com/nft/:chain/collection/:address/wash-check"
},
"sample": {
"url": "https://x402.professorsausages.com/nft/sample",
"hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying."
},
"catalog": {
"message": "You called NFT Insight (Scam Check, Owners). Agents doing nft work commonly also use these — same pay-per-call model, each with a FREE real sample record (freeSample link):",
"related": [
{
"call": "/token-safety?ref=xsell&v=related&from=nft",
"name": "Token Safety Check",
"summary": "On-chain token risk screening for agents",
"freeSample": "/token-safety/sample?ref=xsell&v=related&from=nft"
},
{
"call": "/address-screen?ref=xsell&v=related&from=nft",
"name": "Address Risk Screen",
"summary": "Crypto address risk screening for agents",
"freeSample": "/address-screen/sample?ref=xsell&v=related&from=nft"
},
{
"call": "/sanctions-screen?ref=xsell&v=related&from=nft",
"name": "OFAC Sanctions Name Screen",
"summary": "Fuzzy OFAC name screening for agents with compliance duties",
"freeSample": "/sanctions-screen/sample?ref=xsell&v=related&from=nft"
}
],
"strategy": "related",
"catalogUrl": "https://x402.professorsausages.com/?ref=402&v=related&from=nft"
},
"suggest": {
"url": "https://x402.professorsausages.com/suggest",
"hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first."
},
"discount": {
"off": "50%",
"hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
"header": "X-Intent"
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x54eb…70d5B. The signed payment is good for 1 minute.
- Paid to
- 0x54eb…70d5B
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "object",
"required": [
"chain",
"address",
"verdict",
"patterns",
"window",
"checks_run",
"not_checked",
"method",
"disclaimer",
"freshness"
],
"properties": {
"chain": {
"type": "string"
},
"method": {
"type": "string"
},
"window": {
"type": "object",
"properties": {
"to_block": {
"type": [
"integer",
"null"
]
},
"from_block": {
"type": [
"integer",
"null"
]
},
"sales_analyzed": {
"type": "integer"
}
}
},
"address": {
"type": "string"
},
"tokenId": {
"type": "string"
},
"verdict": {
"enum": [
"NO_WASH_PATTERNS_DETECTED",
"PATTERNS_CONSISTENT_WITH_WASH_TRADING",
"NO_SALES_DATA"
],
"type": "string"
},
"patterns": {
"type": "array",
"items": {
"type": "object",
"required": [
"rule",
"detail",
"evidence"
],
"properties": {
"rule": {
"enum": [
"round_trip",
"pair_churn",
"self_purchase"
],
"type": "string"
},
"detail": {
"type": "string"
},
"evidence": {
"type": "array",
"items": {
"type": "object",
"properties": {
"block": {
"type": [
"integer",
"null"
]
},
"txHash": {
"type": [
"string",
"null"
]
},
"tokenId": {
"type": [
"string",
"null"
]
}
}
}
}
}
}
},
"freshness": {
"type": "object",
"required": [
"tier",
"max_age_seconds",
"as_of"
],
"properties": {
"tier": {
"enum": [
"cached",
"live"
],
"type": "string"
},
"as_of": {
"type": "string",
"description": "ISO timestamp of the upstream data capture."
},
"max_age_seconds": {
"type": "integer",
"description": "86400 on the cached tier, 0 on live."
}
}
},
"checks_run": {
"type": "array",
"items": {
"type": "string"
}
},
"disclaimer": {
"type": "string"
},
"not_checked": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
},
"schema": {
"type": "object",
"required": [
"input"
],
"properties": {
"input": {
"type": "object"
},
"output": {
"type": "object"
}
}
},
"category": "nft",
"routeTemplate": "https://x402.professorsausages.com/nft/:chain/collection/:address/wash-check"
},
"sample": {
"url": "https://x402.professorsausages.com/nft/sample",
"hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying."
},
"catalog": {
"message": "You called NFT Insight (Scam Check, Owners). Agents doing nft work commonly also use these — same pay-per-call model, each with a FREE real sample record (freeSample link):",
"related": [
{
"call": "/token-safety?ref=xsell&v=related&from=nft",
"name": "Token Safety Check",
"summary": "On-chain token risk screening for agents",
"freeSample": "/token-safety/sample?ref=xsell&v=related&from=nft"
},
{
"call": "/address-screen?ref=xsell&v=related&from=nft",
"name": "Address Risk Screen",
"summary": "Crypto address risk screening for agents",
"freeSample": "/address-screen/sample?ref=xsell&v=related&from=nft"
},
{
"call": "/sanctions-screen?ref=xsell&v=related&from=nft",
"name": "OFAC Sanctions Name Screen",
"summary": "Fuzzy OFAC name screening for agents with compliance duties",
"freeSample": "/sanctions-screen/sample?ref=xsell&v=related&from=nft"
}
],
"strategy": "related",
"catalogUrl": "https://x402.professorsausages.com/?ref=402&v=related&from=nft"
},
"suggest": {
"url": "https://x402.professorsausages.com/suggest",
"hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first."
},
"discount": {
"off": "50%",
"hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
"header": "X-Intent"
}
}Provenance
- Seen in the source catalog
- 2026-07-20 23:46Z
- Last indexed by Roundhouse
- 2026-08-08 05:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-25 07:15Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 400
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service NFT Insight (Scam Check, Owners) and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=NFT%20Insight%20(Scam%20Check%2C%20Owners)' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402.professorsausages.com/nft/:chain/collection/:address/wash-check, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.