Roundhouse AI

x402 Intelligence API

x402intel measures, on-chain, the honest size and buyer structure of the x402 agentic-payments economy on Base — the counter-number to self-reported call counts and volume hype. Fact/base-rate, auditor posture, machine-readable for AI agents.

DataLiveeip155:8453Exactvia cdp
https://api.x402intel.uk/x402-authenticity/:payTo
x402Seller-intelligenceAttributionOnchain-analyticsBase
Calls · 30d
2↓ 14%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$8.40
Verified settled volume
147 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-07 09:04Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x7b13107779CfDA1bEba3289d0Fbe27310436f3E3

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",
        "iconUrl": "https://x402intel.uk/favicon.svg",
        "version": "2"
      },
      "payTo": "0x7b13107779CfDA1bEba3289d0Fbe27310436f3E3",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.x402intel.uk/x402-authenticity/:payTo",
    "tags": [
      "x402",
      "seller-intelligence",
      "attribution",
      "onchain-analytics",
      "base"
    ],
    "iconUrl": "https://x402intel.uk/favicon.svg",
    "mimeType": "application/json",
    "description": "x402 seller attribution intelligence: reported calls versus catalog-attributed on-chain USDC flow, payer-address concentration and forensic signals. Attribution is not protocol or fraud proof.",
    "serviceName": "x402 Intelligence API"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "pathParams": {
            "payTo": ":payTo"
          },
          "queryParams": {}
        },
        "output": {
          "type": "json",
          "example": {
            "payTo": "0x0000000000000000000000000000000000000000",
            "verdict": "no-activity",
            "generatedAt": "2026-07-19T00:00:00.000Z"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "pathParams": {
                "type": "object",
                "required": [
                  "payTo"
                ],
                "properties": {
                  "payTo": {
                    "type": "string",
                    "pattern": "^0x[0-9a-fA-F]{40}$"
                  }
                },
                "additionalProperties": false
              },
              "queryParams": {
                "type": "object",
                "properties": {},
                "additionalProperties": false
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "properties": {},
                "additionalProperties": true
              }
            }
          }
        }
      },
      "routeTemplate": "/x402-authenticity/:payTo"
    }
  },
  "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.

0.05USDC≈ $0.05 USD
on Base · exact scheme

Pay 0.05 USDC on Base to 0x7b13…6f3E3. The signed payment is good for 5 minutes.

Paid to
0x7b13…6f3E3
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
50000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "iconUrl": "https://x402intel.uk/favicon.svg",
      "version": "2"
    },
    "payTo": "0x7b13107779CfDA1bEba3289d0Fbe27310436f3E3",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {
          "payTo": "0x5a78ace5dd133316c8aaf7e156fbfc57e1209cf9"
        },
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "payTo": "0x0000000000000000000000000000000000000000",
          "verdict": "no-activity",
          "generatedAt": "2026-07-19T00:00:00.000Z"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object",
              "required": [
                "payTo"
              ],
              "properties": {
                "payTo": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$"
                }
              },
              "additionalProperties": false
            },
            "queryParams": {
              "type": "object",
              "properties": {},
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {},
              "additionalProperties": true
            }
          }
        }
      }
    },
    "routeTemplate": "/x402-authenticity/:payTo"
  }
}

Provenance

Seen in the source catalog
2026-08-26 06:42Z
Last indexed by Roundhouse
2026-09-26 19:30Z
Last enriched (probe, favicon, geo)
2026-09-21 05:46Z
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. 30 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 Intelligence API 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%20Intelligence%20API'
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://api.x402intel.uk/x402-authenticity/:payTo, 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.