Roundhouse

Bot Bazaar

Validate EIP-3009 TransferWithAuthorization domain parameters (name, version, chainId, verifyingContract, nonce) for Base USDC and compute canonical EIP-712 typeHashes.

InfraLiveeip155:8453Exactvia cdp
https://bot-bazaar.fly.dev/v1/x402/eip3009-params-check
x402ReputationSellersBaseUsdc
Settlements · 30d
350↑ 17300%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$3.88
Verified settled volume
355 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.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-26 00:58Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9

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": "0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://bot-bazaar.fly.dev/v1/x402/eip3009-params-check",
    "tags": [
      "x402",
      "reputation",
      "sellers",
      "base",
      "usdc"
    ],
    "mimeType": "application/json",
    "description": "Validate EIP-3009 TransferWithAuthorization domain parameters (name, version, chainId, verifyingContract, nonce) for Base USDC and compute canonical EIP-712 typeHashes.",
    "serviceName": "Bot Bazaar"
  },
  "accepts_v1": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9",
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://bot-bazaar.fly.dev/v1/x402/eip3009-params-check",
      "description": "Validate EIP-3009 TransferWithAuthorization domain parameters (name, version, chainId, verifyingContract, nonce) for Base USDC and compute canonical EIP-712 typeHashes.",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "name": {
              "type": "string",
              "description": "EIP-712 token domain name (e.g. USD Coin)"
            }
          }
        }
      },
      "maxAmountRequired": "10000",
      "maxTimeoutSeconds": 300
    }
  ],
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "name": "USD Coin"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "tool": "eip3009-params-check",
            "valid": true,
            "checks": {
              "base_chain_id_ok": true,
              "nonce_bytes32_ok": true,
              "validity_window_ok": true,
              "usdc_domain_name_ok": true,
              "is_canonical_base_usdc": true,
              "usdc_domain_version_ok": true,
              "verifying_contract_format_ok": true
            },
            "domain": {
              "name": "USD Coin",
              "chainId": 8453,
              "version": "2",
              "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
            },
            "generated_at": 1792950000,
            "eip712_domain_typehash": "0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f",
            "transfer_with_authorization_typehash": "0x7c7c6cdb67a18743f49ec6fa9b35f50d52ed05cbed4cc592e13b44501c1a2267"
          }
        }
      },
      "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",
                "properties": {
                  "name": {
                    "type": "string",
                    "description": "EIP-712 token domain name (e.g. USD Coin)"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "facilitator": "cdp",
  "x402Version": 2,
  "alternative_payment": {
    "how": "Transfer the amount in USDC on Base directly to payTo, wait for 3 confirmations, then repeat this request with header X-PAYMENT-TX: <tx hash>.",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "header": "X-PAYMENT-TX",
    "pay_to": "0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9",
    "chain_id": 8453,
    "single_use": true,
    "amount_usdc": "0.01"
  }
}

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 0x847f…b03A9. The signed payment is good for 5 minutes.

Paid to
0x847f…b03A9
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": "0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "name": "USD Coin"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "tool": "eip3009-params-check",
          "valid": true,
          "checks": {
            "base_chain_id_ok": true,
            "nonce_bytes32_ok": true,
            "validity_window_ok": true,
            "usdc_domain_name_ok": true,
            "is_canonical_base_usdc": true,
            "usdc_domain_version_ok": true,
            "verifying_contract_format_ok": true
          },
          "domain": {
            "name": "USD Coin",
            "chainId": 8453,
            "version": "2",
            "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
          },
          "generated_at": 1792950000,
          "eip712_domain_typehash": "0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f",
          "transfer_with_authorization_typehash": "0x7c7c6cdb67a18743f49ec6fa9b35f50d52ed05cbed4cc592e13b44501c1a2267"
        }
      }
    },
    "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",
              "properties": {
                "name": {
                  "type": "string",
                  "description": "EIP-712 token domain name (e.g. USD Coin)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-26 00:58Z
Last indexed by Roundhouse
2026-10-26 20:40Z
Last enriched (probe, favicon, geo)
2026-10-26 10:46Z
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 Bot Bazaar 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=Bot%20Bazaar'
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://bot-bazaar.fly.dev/v1/x402/eip3009-params-check, 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.