x402.nsgoods.org
nsgoods is a suite of eleven x402 pay-per-call APIs for AI agents on Base + Solana: crypto signals, agent trust, OFAC sanctions + malicious-address screening, multi-chain OFAC SDN screening (Solana-settled), market regime, extractability, solar legality, x402 payability checks and signed endpoint watchdog monitoring.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 5 USDC on Base to 0xc87a…EF990. The signed payment is good for 5 minutes.
- Paid to
- 0xc87a…EF990
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xc87a06DEE4c0E85912296002617120BBfd5EF990",
"amount": "5000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"channel": "https://hooks.example.com/wd",
"endpoint": "https://api.example-seller.com/x402/quote"
}
},
"output": {
"type": "json",
"example": {
"tier": "paid",
"type": "registration_receipt",
"digest": "ca96e3d0aaf1f883506aa90b2f3057289bd1b6141bed5b6966b2468024f24039",
"signer": "0x57fF0F084Cba33e6761503f90eEF0Da9F159350c",
"endpoint": "https://api.example-seller.com/x402/quote",
"manifest": {
"url": "https://x402.nsgoods.org/proof/index.json",
"entry": "watchdog"
},
"signature": "0xf3c3c2980b877607fa85b5272e3b08cff9b37c711e297104ee1495a543f3189d42fec365153d6f9b912ae80308e4fd26803c92b6e10514ead21bf4147a5c3d811b",
"expires_at": "2026-10-01T12:04:00+00:00",
"channel_ref": "78e41ddd041f503681dc9aade1dfa0644953e4791c4dbd3027d311d5d930bb3c",
"limitations": [
"monitoring begins at verified_at; changes before it are not covered; free tier is one endpoint per verified channel and cannot be swapped without a paid registration in v1"
],
"verified_at": "2026-09-01T12:04:00+00:00",
"channel_type": "webhook",
"registered_at": "2026-09-01T12:00:00+00:00",
"schema_version": "watchdog_v1",
"subscription_id": "sub_paid_demo",
"alert_types_enabled": [
"endpoint_unreachable",
"endpoint_recovered",
"verdict_degraded",
"verdict_restored",
"payto_changed",
"networks_changed",
"asset_changed",
"self_inconsistent_402_detected",
"listing_disappeared_from_catalog"
],
"verification_status": "verified"
}
}
},
"schema": {
"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": [
"endpoint",
"channel"
],
"properties": {
"channel": {
"type": "string",
"description": "email address or https webhook URL for alerts."
},
"endpoint": {
"type": "string",
"description": "https x402 endpoint URL to monitor."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"schema_version",
"type",
"tier",
"signer",
"signature"
],
"properties": {
"tier": {
"type": "string"
},
"type": {
"type": "string"
},
"signer": {
"type": "string"
},
"signature": {
"type": "string"
},
"schema_version": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-02 08:18Z
- Last indexed by Roundhouse
- 2026-09-24 23:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 23:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 22 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service x402.nsgoods.org 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=x402.nsgoods.org' 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.nsgoods.org/watchdog/register/paid, 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.