Roundhouse AI

trust.nsgoods.org

Cross-chain ERC-8004 trust score for one (chain, agent) pair — signed JSON with transparent component breakdown (value_avg / client_breadth / volume / recency), per-chain context, and methodology link. USDC pay-per-call on Base mainnet.

Dataofflineeip155:8453Exactvia cdp
https://trust.nsgoods.org/agent-trust
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 26 snapshots so far.
$9.37
Verified settled volume
297 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
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 2026-09-19 15:20Z
—
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": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://trust.nsgoods.org/agent-trust",
    "mimeType": "application/json",
    "description": "Cross-chain ERC-8004 trust score for one (chain, agent) pair — signed JSON with transparent component breakdown (value_avg / client_breadth / volume / recency), per-chain context, and methodology link. USDC pay-per-call on Base mainnet."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET"
        },
        "output": {
          "type": "json",
          "example": {
            "chain": "ethereum",
            "result": {
              "score": 78.4,
              "inputs": {
                "feedback_count": 42,
                "distinct_clients": 18
              },
              "status": "ok",
              "components": {
                "volume": 88.2,
                "recency": 76.1,
                "value_avg": 75,
                "client_breadth": 80.5
              }
            },
            "agent_id": 123,
            "methodology": "https://trust.nsgoods.org/methodology"
          }
        }
      },
      "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": [
                  "agent"
                ],
                "properties": {
                  "agent": {
                    "type": "string",
                    "description": "ERC-8004 agentId (uint256), e.g. 25975."
                  },
                  "chain": {
                    "type": "string",
                    "description": "one of ['base', 'bsc', 'ethereum', 'mantle', 'polygon']; default ethereum."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "required": [
                  "chain",
                  "agent_id",
                  "result"
                ],
                "properties": {
                  "chain": {
                    "type": "string"
                  },
                  "result": {
                    "type": "object"
                  },
                  "agent_id": {
                    "type": "integer"
                  },
                  "methodology": {
                    "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.

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 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
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc87a06DEE4c0E85912296002617120BBfd5EF990",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "agent": "6888",
          "chain": "ethereum"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "ethereum",
          "result": {
            "score": 78.4,
            "inputs": {
              "feedback_count": 42,
              "distinct_clients": 18
            },
            "status": "ok",
            "components": {
              "volume": 88.2,
              "recency": 76.1,
              "value_avg": 75,
              "client_breadth": 80.5
            }
          },
          "agent_id": 123,
          "methodology": "https://trust.nsgoods.org/methodology"
        }
      }
    },
    "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": [
                "agent"
              ],
              "properties": {
                "agent": {
                  "type": "string",
                  "description": "ERC-8004 agentId (uint256), e.g. 25975."
                },
                "chain": {
                  "type": "string",
                  "description": "one of ['base', 'bsc', 'ethereum', 'mantle', 'polygon']; default ethereum."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "chain",
                "agent_id",
                "result"
              ],
              "properties": {
                "chain": {
                  "type": "string"
                },
                "result": {
                  "type": "object"
                },
                "agent_id": {
                  "type": "integer"
                },
                "methodology": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-19 15:20Z
Last indexed by Roundhouse
2026-09-24 13:10Z
Last enriched (probe, favicon, geo)
2026-09-21 12:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 0
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. 26 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 trust.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=trust.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://trust.nsgoods.org/agent-trust, 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.