Roundhouse

x402.nsgoods.org

nsgoods is a suite of twelve 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/settle
Calls · 30d
5↑ 13%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 23 snapshots so far.
$9.37
Verified settled volume
297 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
5
Calls · 30d
Upstream's own call count for this endpoint, not ours.
4
Unique payers · 30d
Last called 2026-09-14 19:54Z
—
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.

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": "0xc87a06DEE4c0E85912296002617120BBfd5EF990",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.nsgoods.org/settle",
    "mimeType": "application/json",
    "description": "Signed Solana settlement verification (did tx credit amount of mint to payee). Free preview: GET /settle/preview"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "tx": "5ygvXjuYao3MtHQkWzBvgXxjg9vWAoG6rMM6qVjPDLym1Qi3MtaGaWBS2hpMCp56TW7yUpP7pqaimBb6LiLTiiGu",
            "mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
            "payee": "8SfS2XEedD595GqpNGjgYpRhSAUidThXQHznExpbDwEX",
            "amount": "415803"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "slot": 0,
            "chain": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
            "signer": "0x57fF0F084Cba33e6761503f90eEF0Da9F159350c",
            "verdict": "VERIFIED",
            "signature": "0x00",
            "commitment": "finalized",
            "schema_version": "settle_v1"
          }
        }
      },
      "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": [
                  "tx",
                  "payee",
                  "amount"
                ],
                "properties": {
                  "tx": {
                    "type": "string",
                    "description": "Solana transaction signature (base58)."
                  },
                  "mint": {
                    "type": "string",
                    "description": "SPL mint (default USDC EPjFWdd5...)."
                  },
                  "payee": {
                    "type": "string",
                    "description": "Solana address expected to be credited."
                  },
                  "payer": {
                    "type": "string",
                    "description": "Optional: address expected to be a signer."
                  },
                  "amount": {
                    "type": "string",
                    "description": "Expected atomic units of the mint credited to payee."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "required": [
                  "schema_version",
                  "verdict",
                  "chain",
                  "signer",
                  "signature"
                ],
                "properties": {
                  "slot": {
                    "type": [
                      "integer",
                      "null"
                    ]
                  },
                  "chain": {
                    "type": "string"
                  },
                  "signer": {
                    "type": "string"
                  },
                  "verdict": {
                    "enum": [
                      "VERIFIED",
                      "REFUTED",
                      "UNCONFIRMED",
                      "NOT_FOUND",
                      "not_evaluated"
                    ],
                    "type": "string"
                  },
                  "signature": {
                    "type": "string"
                  },
                  "commitment": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "schema_version": {
                    "type": "string"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 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
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc87a06DEE4c0E85912296002617120BBfd5EF990",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "tx": "5ygvXjuYao3MtHQkWzBvgXxjg9vWAoG6rMM6qVjPDLym1Qi3MtaGaWBS2hpMCp56TW7yUpP7pqaimBb6LiLTiiGu",
          "mint": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
          "payee": "8SfS2XEedD595GqpNGjgYpRhSAUidThXQHznExpbDwEX",
          "amount": "415803"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "slot": 0,
          "chain": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
          "signer": "0x57fF0F084Cba33e6761503f90eEF0Da9F159350c",
          "verdict": "VERIFIED",
          "signature": "0x00",
          "commitment": "finalized",
          "schema_version": "settle_v1"
        }
      }
    },
    "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": [
                "tx",
                "payee",
                "amount"
              ],
              "properties": {
                "tx": {
                  "type": "string",
                  "description": "Solana transaction signature (base58)."
                },
                "mint": {
                  "type": "string",
                  "description": "SPL mint (default USDC EPjFWdd5...)."
                },
                "payee": {
                  "type": "string",
                  "description": "Solana address expected to be credited."
                },
                "payer": {
                  "type": "string",
                  "description": "Optional: address expected to be a signer."
                },
                "amount": {
                  "type": "string",
                  "description": "Expected atomic units of the mint credited to payee."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "schema_version",
                "verdict",
                "chain",
                "signer",
                "signature"
              ],
              "properties": {
                "slot": {
                  "type": [
                    "integer",
                    "null"
                  ]
                },
                "chain": {
                  "type": "string"
                },
                "signer": {
                  "type": "string"
                },
                "verdict": {
                  "enum": [
                    "VERIFIED",
                    "REFUTED",
                    "UNCONFIRMED",
                    "NOT_FOUND",
                    "not_evaluated"
                  ],
                  "type": "string"
                },
                "signature": {
                  "type": "string"
                },
                "commitment": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "schema_version": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-14 19:54Z
Last indexed by Roundhouse
2026-09-24 10:40Z
Last enriched (probe, favicon, geo)
2026-09-24 09:45Z
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. 23 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/settle, 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.