Roundhouse AI

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.

OtherLiveeip155:8453Exactvia cdp
https://x402.nsgoods.org/preflight
Calls · 30d
4→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 22 snapshots so far.
$9.37
Verified settled volume
298 settlements proven x402 by their on-chain EIP-3009 marker.
$0.015
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-05 00:16Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xc87a06DEE4c0E85912296002617120BBfd5EF990

The 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.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.015USDC≈ $0.015 USD
on Base · exact scheme

Pay 0.015 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
15000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc87a06DEE4c0E85912296002617120BBfd5EF990",
    "amount": "15000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "role": "payee",
          "chain": "eip155:8453",
          "address": "0xc87a06DEE4c0E85912296002617120BBfd5EF990"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "envelope": {
            "signer": "0x57fF0F084Cba33e6761503f90eEF0Da9F159350c",
            "signature": "0x00"
          },
          "schema_version": "preflight_v3",
          "components_evaluated": 3
        }
      }
    },
    "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": [
                "address",
                "chain",
                "role"
              ],
              "properties": {
                "role": {
                  "type": "string",
                  "description": "One of payer, payee, escrow_destination."
                },
                "chain": {
                  "type": "string",
                  "description": "CAIP-2 chain of the subject, e.g. eip155:8453."
                },
                "address": {
                  "type": "string",
                  "description": "Subject EVM address (0x-hex)."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "schema_version",
                "components_evaluated",
                "envelope"
              ],
              "properties": {
                "envelope": {
                  "type": "object"
                },
                "schema_version": {
                  "type": "string"
                },
                "components_evaluated": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-05 00:16Z
Last indexed by Roundhouse
2026-09-25 02:20Z
Last enriched (probe, favicon, geo)
2026-09-10 23:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

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.

Open skill.md
Show 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/preflight, 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.