Roundhouse

QuickBuild

Look up one transaction on Base mainnet by hash: status (success, failed or pending), block, timestamp, confirmations, from/to, value, method id, gas used, effective gas price, fee split into L2 execution and L1 data fee (ETH and USD), contract created, and decoded ERC-20 Transfer events (token, symbol, from, to, amount; up to 20). Useful to confirm a payment landed. Read live from public Base RPC. All params optional: defaults to a confirmed USDC x402 payment. Unknown hash = 404, invalid...

TradingLiveeip155:8453Exactvia cdp
https://quickbuild.quynguyenbac.workers.dev/api/base/tx
BaseTransactionReceiptCryptoOnchain
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 snapshots so far.
$0.18
Verified settled volume
26 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
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 2026-10-24 16:08Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf

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": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://quickbuild.quynguyenbac.workers.dev/api/base/tx",
      "description": "Look up one transaction on Base mainnet by hash: status (success, failed or pending), block, timestamp, confirmations, from/to, value, method id, gas used, effective gas price, fee split into L2 execution and L1 data fee (ETH and USD), contract created, and decoded ERC-20 Transfer events (token, symbol, from, to, amount; up to 20). Useful to confirm a payment landed. Read live from public Base RPC. All params optional: defaults to a confirmed USDC x402 payment. Unknown hash = 404, invalid...",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "hash": "0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf"
          },
          "discoverable": true
        },
        "output": {
          "type": "json",
          "example": {
            "to": "0xcA11bde05977b3631167028862bE2a173976CA11",
            "fee": {
              "usd": 0.001894,
              "totalEth": "0.000000777072788913"
            },
            "from": "0xB2Bd29925CBbCEA7628279c91945Ca5B98bf371B",
            "hash": "0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf",
            "status": "success",
            "chainId": 8453,
            "gasUsed": 109412,
            "methodId": "0x82ad56cb",
            "valueEth": "0",
            "blockNumber": 52864498,
            "confirmations": 3716,
            "blockTimestamp": "2026-10-20T17:45:43.000Z",
            "erc20Transfers": [
              {
                "to": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
                "from": "0xA1d1C0cf717402ff3651aA4873CcF96410B01978",
                "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "amount": "0.05",
                "symbol": "USDC"
              }
            ]
          }
        }
      },
      "maxAmountRequired": "2000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://quickbuild.quynguyenbac.workers.dev/api/base/tx",
    "tags": [
      "base",
      "transaction",
      "receipt",
      "crypto",
      "onchain"
    ],
    "mimeType": "application/json",
    "description": "Look up one transaction on Base mainnet by hash: status (success, failed or pending), block, timestamp, confirmations, from/to, value, method id, gas used, effective gas price, fee split into L2 execution and L1 data fee (ETH and USD), contract created, and decoded ERC-20 Transfer events (token, symbol, from, to, amount; up to 20). Useful to confirm a payment landed. Read live from public Base RPC. All params optional: defaults to a confirmed USDC x402 payment. Unknown hash = 404, invalid...",
    "serviceName": "QuickBuild"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "hash": "0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "to": "0xcA11bde05977b3631167028862bE2a173976CA11",
            "fee": {
              "usd": 0.001894,
              "totalEth": "0.000000777072788913"
            },
            "from": "0xB2Bd29925CBbCEA7628279c91945Ca5B98bf371B",
            "hash": "0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf",
            "status": "success",
            "chainId": 8453,
            "gasUsed": 109412,
            "methodId": "0x82ad56cb",
            "valueEth": "0",
            "blockNumber": 52864498,
            "confirmations": 3716,
            "blockTimestamp": "2026-10-20T17:45:43.000Z",
            "erc20Transfers": [
              {
                "to": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
                "from": "0xA1d1C0cf717402ff3651aA4873CcF96410B01978",
                "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "amount": "0.05",
                "symbol": "USDC"
              }
            ]
          }
        }
      },
      "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": [],
                "properties": {
                  "hash": {
                    "type": "string",
                    "description": "Transaction hash (0x + 64 hex). Optional: defaults to 0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "properties": {
                  "to": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "fee": {
                    "type": "object",
                    "properties": {
                      "usd": {
                        "type": [
                          "number",
                          "null"
                        ]
                      },
                      "totalEth": {
                        "type": "string"
                      }
                    }
                  },
                  "from": {
                    "type": "string"
                  },
                  "hash": {
                    "type": "string"
                  },
                  "status": {
                    "enum": [
                      "success",
                      "failed",
                      "pending"
                    ],
                    "type": "string"
                  },
                  "gasUsed": {
                    "type": "integer"
                  },
                  "methodId": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "valueEth": {
                    "type": "string"
                  },
                  "blockNumber": {
                    "type": [
                      "integer",
                      "null"
                    ]
                  },
                  "confirmations": {
                    "type": "integer"
                  },
                  "blockTimestamp": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "erc20Transfers": {
                    "type": "array",
                    "items": {
                      "type": "object",
                      "properties": {
                        "to": {
                          "type": "string"
                        },
                        "from": {
                          "type": "string"
                        },
                        "token": {
                          "type": "string"
                        },
                        "amount": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "symbol": {
                          "type": [
                            "string",
                            "null"
                          ]
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "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.

0.002USDC≈ $0.002 USD
on Base · exact scheme

Pay 0.002 USDC on Base to 0x751a…eA7cf. The signed payment is good for 5 minutes.

Paid to
0x751a…eA7cf
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "hash": "0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "to": "0xcA11bde05977b3631167028862bE2a173976CA11",
          "fee": {
            "usd": 0.001894,
            "totalEth": "0.000000777072788913"
          },
          "from": "0xB2Bd29925CBbCEA7628279c91945Ca5B98bf371B",
          "hash": "0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf",
          "status": "success",
          "chainId": 8453,
          "gasUsed": 109412,
          "methodId": "0x82ad56cb",
          "valueEth": "0",
          "blockNumber": 52864498,
          "confirmations": 3716,
          "blockTimestamp": "2026-10-20T17:45:43.000Z",
          "erc20Transfers": [
            {
              "to": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
              "from": "0xA1d1C0cf717402ff3651aA4873CcF96410B01978",
              "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "amount": "0.05",
              "symbol": "USDC"
            }
          ]
        }
      }
    },
    "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": [],
              "properties": {
                "hash": {
                  "type": "string",
                  "description": "Transaction hash (0x + 64 hex). Optional: defaults to 0x20215b4a54f0a39995f3afbd748d7b52c3a1922685ddf08e5f694ea1e89b52bf."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "to": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "fee": {
                  "type": "object",
                  "properties": {
                    "usd": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "totalEth": {
                      "type": "string"
                    }
                  }
                },
                "from": {
                  "type": "string"
                },
                "hash": {
                  "type": "string"
                },
                "status": {
                  "enum": [
                    "success",
                    "failed",
                    "pending"
                  ],
                  "type": "string"
                },
                "gasUsed": {
                  "type": "integer"
                },
                "methodId": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "valueEth": {
                  "type": "string"
                },
                "blockNumber": {
                  "type": [
                    "integer",
                    "null"
                  ]
                },
                "confirmations": {
                  "type": "integer"
                },
                "blockTimestamp": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "erc20Transfers": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "to": {
                        "type": "string"
                      },
                      "from": {
                        "type": "string"
                      },
                      "token": {
                        "type": "string"
                      },
                      "amount": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "symbol": {
                        "type": [
                          "string",
                          "null"
                        ]
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-24 16:08Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
2026-10-21 15:46Z
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. 15 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 QuickBuild 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=QuickBuild'
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://quickbuild.quynguyenbac.workers.dev/api/base/tx, 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.