Roundhouse

Payment Receipt/Settlement Proof

x402-paid agent wallet spend audit — $0.05 USDC on Base

DataLiveeip155:8453Exactvia cdp
https://audit.liquidlogicx.com/api/prove
Payment-receiptSettlement-proofVerifyx402Usdc
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$0.55
Verified settled volume
40 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
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 2026-10-06 04:48Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x147991A1c25e78f6D9225d2dBA61eD93A6158c7b

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.

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x1479…58c7b. The signed payment is good for 5 minutes.

Paid to
0x1479…58c7b
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
20000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x147991A1c25e78f6D9225d2dBA61eD93A6158c7b",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "memo": "invoice-42",
          "txHash": "0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "arc": {
            "chain": "eip155:5042",
            "txHash": "0x2bb316073c034140d74d73ca67ad2b71bfaaa9dea531d69290a16efdd0f10bbe",
            "contract": "0x1de52cbc4490a7873ef007e51cb91a5b374facb1"
          },
          "memo": "llx-self-test-0.001",
          "refId": "0xe6db5a86740c0e40943c06268bda4e09b45ac0a45fd6c5d7b7f2550e19e0c50e",
          "source": {
            "to": "0x147991A1c25e78f6D9225d2dBA61eD93A6158c7b",
            "from": "0xEA24bafbBAF6d7Ba58bE860EE906f0Fe533d167D",
            "chain": "eip155:8453",
            "txHash": "0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c",
            "timestamp": "2026-09-15T20:38:57.000Z",
            "amountUsdc": "0.001"
          },
          "status": "recorded",
          "proofId": 1,
          "verifyUrl": "https://proofs.liquidlogicx.com/proofs?q=0xe6db5a86740c0e40943c06268bda4e09b45ac0a45fd6c5d7b7f2550e19e0c50e",
          "recordedAt": "2026-09-22T15:32:28.000Z"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "txHash"
              ],
              "properties": {
                "memo": {
                  "type": "string",
                  "pattern": "^[\\x20-\\x7E]*$",
                  "maxLength": 64,
                  "description": "Optional plain-text note stored on-chain with the proof (printable ASCII, max 64 chars). Public."
                },
                "txHash": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{64}$",
                  "description": "Base mainnet (eip155:8453) transaction hash of a USDC payment (must contain a Transfer from Base USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). Your paying wallet must be its from or to."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "proofId",
                "status",
                "source",
                "arc",
                "verifyUrl",
                "recordedAt"
              ],
              "properties": {
                "arc": {
                  "type": "object",
                  "required": [
                    "chain",
                    "contract",
                    "txHash"
                  ],
                  "properties": {
                    "chain": {
                      "type": "string",
                      "const": "eip155:5042"
                    },
                    "txHash": {
                      "type": [
                        "string",
                        "null"
                      ],
                      "pattern": "^0x[0-9a-fA-F]{64}$",
                      "description": "Arc tx that recorded the proof"
                    },
                    "contract": {
                      "type": "string",
                      "const": "0x1de52cbc4490a7873ef007e51cb91a5b374facb1"
                    }
                  }
                },
                "memo": {
                  "type": "string"
                },
                "refId": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{64}$",
                  "description": "Settlement ID on Arc = keccak256(srcTxHash, payee, amountUSDC)"
                },
                "source": {
                  "type": "object",
                  "required": [
                    "chain",
                    "txHash",
                    "from",
                    "to",
                    "amountUsdc",
                    "timestamp"
                  ],
                  "properties": {
                    "to": {
                      "type": "string",
                      "pattern": "^0x[0-9a-fA-F]{40}$"
                    },
                    "from": {
                      "type": "string",
                      "pattern": "^0x[0-9a-fA-F]{40}$"
                    },
                    "chain": {
                      "type": "string",
                      "const": "eip155:8453"
                    },
                    "txHash": {
                      "type": "string",
                      "pattern": "^0x[0-9a-fA-F]{64}$"
                    },
                    "timestamp": {
                      "type": "string",
                      "description": "Base block time (UTC)"
                    },
                    "amountUsdc": {
                      "type": "string",
                      "description": "Decimal USDC, e.g. \"0.05\""
                    }
                  }
                },
                "status": {
                  "enum": [
                    "recorded",
                    "existing"
                  ],
                  "type": "string"
                },
                "proofId": {
                  "type": [
                    "integer",
                    "null"
                  ],
                  "description": "1-based position in the SettlementProofs registry on Arc"
                },
                "verifyUrl": {
                  "type": "string",
                  "description": "Public verifier page on proofs.liquidlogicx.com"
                },
                "recordedAt": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "s": [
        "cdp_sdk_server"
      ]
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  },
  "eip2612GasSponsoring": {},
  "erc20ApprovalGasSponsoring": {}
}

Provenance

Seen in the source catalog
2026-10-06 04:48Z
Last indexed by Roundhouse
2026-10-26 17:10Z
Last enriched (probe, favicon, geo)
2026-09-25 07:15Z
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. 32 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 Payment Receipt/Settlement Proof 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=Payment%20Receipt%2FSettlement%20Proof'
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://audit.liquidlogicx.com/api/prove, 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. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.