Roundhouse

curvecall.onrender.com

Wallet snapshot ($0.005): contract-or-EOA, tx count, native balance and fresh-wallet flag; EVM chains.

MediaLiveeip155:8453Exactvia facilitator:payAI
https://curvecall.onrender.com/v1/wallet/base/0x4200000000000000000000000000000000000006
Settlements · 30d
19
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.29
Verified settled volume
38 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.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x21ef7f9c9546915624ea6852bed4a5b3e48831b0

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-SIGNATURE header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x21ef7f9c9546915624ea6852bed4a5b3e48831b0",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "pathParams": {
            "chain": {
              "type": "string",
              "required": true,
              "description": "EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc"
            },
            "address": {
              "type": "string",
              "required": true,
              "description": "Wallet or contract address"
            }
          }
        },
        "output": {
          "example": {
            "chain": "base",
            "address": "0x4200000000000000000000000000000000000006",
            "tx_count": 0,
            "disclaimer": "Read-only on-chain facts, not financial advice.",
            "is_contract": true,
            "fresh_wallet": true,
            "native_balance": 279426.36827951
          }
        }
      },
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "DTdGKbbSnnaD7CFMELxJPXx981Gc8k6b8ND6NXBgnfW3",
      "amount": "5000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "GET",
          "pathParams": {
            "chain": {
              "type": "string",
              "required": true,
              "description": "EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc"
            },
            "address": {
              "type": "string",
              "required": true,
              "description": "Wallet or contract address"
            }
          }
        },
        "output": {
          "example": {
            "chain": "base",
            "address": "0x4200000000000000000000000000000000000006",
            "tx_count": 0,
            "disclaimer": "Read-only on-chain facts, not financial advice.",
            "is_contract": true,
            "fresh_wallet": true,
            "native_balance": 279426.36827951
          }
        }
      },
      "maxTimeoutSeconds": 60
    },
    {
      "asset": "ZEC",
      "extra": {
        "curveCallQuote": {
          "usd": "0.005",
          "expires": 1792668074,
          "signature": "4b6ff3235dc519c6608b0b618ec4581b199b3fc2075e7114ad1a48cccbb07bf2"
        }
      },
      "payTo": "u12aqzh5mc270u33zhz6xjah4cl4zmc6g2rfzxxv8ywaxzxt50j975v38x3dsakw7e7wfkg657s2p8rv6ne4p6njlw68tlwws2aunumuc5",
      "amount": "400",
      "scheme": "exact",
      "network": "zcash:mainnet",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://curvecall.onrender.com/v1/wallet/base/0x4200000000000000000000000000000000000006",
    "mimeType": "application/json",
    "description": "Wallet snapshot ($0.005): contract-or-EOA, tx count, native balance and fresh-wallet flag; EVM chains."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "pathParams": {
            "chain": {
              "type": "string",
              "required": true,
              "description": "EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc"
            },
            "address": {
              "type": "string",
              "required": true,
              "description": "Wallet or contract address"
            }
          }
        },
        "output": {
          "type": "json",
          "example": {
            "chain": "base",
            "address": "0x4200000000000000000000000000000000000006",
            "tx_count": 0,
            "disclaimer": "Read-only on-chain facts, not financial advice.",
            "is_contract": true,
            "fresh_wallet": true,
            "native_balance": 279426.36827951
          }
        }
      },
      "schema": {
        "type": "object",
        "properties": {
          "input": {
            "type": "object",
            "properties": {
              "pathParams": {
                "chain": {
                  "type": "string",
                  "required": true,
                  "description": "EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc"
                },
                "address": {
                  "type": "string",
                  "required": true,
                  "description": "Wallet or contract address"
                }
              },
              "queryParams": {}
            }
          },
          "output": {
            "type": "object",
            "properties": {
              "example": {
                "chain": "base",
                "address": "0x4200000000000000000000000000000000000006",
                "tx_count": 0,
                "disclaimer": "Read-only on-chain facts, not financial advice.",
                "is_contract": true,
                "fresh_wallet": true,
                "native_balance": 279426.36827951
              }
            }
          }
        }
      }
    }
  },
  "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 0x21ef…831b0. The signed payment is good for 1 minute.

Paid to
0x21ef…831b0
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x21ef7f9c9546915624ea6852bed4a5b3e48831b0",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {
          "chain": {
            "type": "string",
            "required": true,
            "description": "EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc"
          },
          "address": {
            "type": "string",
            "required": true,
            "description": "Wallet or contract address"
          }
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "base",
          "address": "0x4200000000000000000000000000000000000006",
          "tx_count": 0,
          "disclaimer": "Read-only on-chain facts, not financial advice.",
          "is_contract": true,
          "fresh_wallet": true,
          "native_balance": 279426.36827951
        }
      }
    },
    "schema": {
      "type": "object",
      "properties": {
        "input": {
          "type": "object",
          "properties": {
            "pathParams": {
              "chain": {
                "type": "string",
                "required": true,
                "description": "EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc"
              },
              "address": {
                "type": "string",
                "required": true,
                "description": "Wallet or contract address"
              }
            },
            "queryParams": {}
          }
        },
        "output": {
          "type": "object",
          "properties": {
            "example": {
              "chain": "base",
              "address": "0x4200000000000000000000000000000000000006",
              "tx_count": 0,
              "disclaimer": "Read-only on-chain facts, not financial advice.",
              "is_contract": true,
              "fresh_wallet": true,
              "native_balance": 279426.36827951
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-22 06:29Z
Last indexed by Roundhouse
2026-10-26 13:16Z
Last enriched (probe, favicon, geo)
2026-10-22 11:16Z
x402 version
2
Max timeout
60s
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 curvecall.onrender.com 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=curvecall.onrender.com'
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://curvecall.onrender.com/v1/wallet/base/0x4200000000000000000000000000000000000006, 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.