Raw contract call

Name: Raw contract call
Price: 0.005 USDC
Availability: InStock

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InferenceLiveeip155:8453Exactvia cdp

https://flat-rate-llm.kikoribera03.workers.dev/v1/evm/call

Eth_callRead contractContract callCalldataAbi

Calls · 30d

2→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 snapshots so far.

$1.91

Verified settled volume

259 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

Last called 2026-09-10 13:13Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xc210Ea7D5692a6401ADf25BbCB7aCDe9cDB7e9Ff

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": "0xc210Ea7D5692a6401ADf25BbCB7aCDe9cDB7e9Ff",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xc210Ea7D5692a6401ADf25BbCB7aCDe9cDB7e9Ff",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:137",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xc210Ea7D5692a6401ADf25BbCB7aCDe9cDB7e9Ff",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:42161",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://flat-rate-llm.kikoribera03.workers.dev/v1/evm/call",
    "tags": [
      "eth_call",
      "read contract",
      "contract call",
      "calldata",
      "abi",
      "contract",
      "evm",
      "base",
      "ethereum",
      "polygon",
      "arbitrum",
      "optimism"
    ],
    "iconUrl": "https://flat-rate-llm.kikoribera03.workers.dev/icon.svg",
    "mimeType": "",
    "description": "Runs any read-only contract call (eth_call) with your own calldata and returns the raw result, on five chains, with no API key and no rate limit. The escape hatch for anything the typed endpoints do not cover.",
    "serviceName": "Raw contract call"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "data": "0x18160ddd",
            "chain": "base"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "asUint": "1687451254752",
            "result": "0x00000000000000000000000000000000000000000000000000000188f2a0c1e0"
          }
        }
      },
      "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": [
                  "to",
                  "data"
                ],
                "properties": {
                  "to": {
                    "type": "string",
                    "description": "Contract address to call."
                  },
                  "data": {
                    "type": "string",
                    "description": "0x-prefixed calldata: 4-byte selector plus encoded arguments."
                  },
                  "from": {
                    "type": "string",
                    "description": "Optional caller address, for calls that check msg.sender."
                  },
                  "block": {
                    "type": "string",
                    "description": "Block tag or number. Defaults to latest."
                  },
                  "chain": {
                    "type": "string",
                    "description": "base | ethereum | polygon | arbitrum | optimism."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "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 0xc210…7e9Ff. The signed payment is good for 5 minutes.

Paid to: 0xc210…7e9Ff
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 5000 smallest units

5000units

on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xc210…7e9Ff
Token contract: 0x3c49…c3359
Payment window: 5 minutes

5000units

on Arbitrum · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xc210…7e9Ff
Token contract: 0xaf88…e5831
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc210Ea7D5692a6401ADf25BbCB7aCDe9cDB7e9Ff",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc210Ea7D5692a6401ADf25BbCB7aCDe9cDB7e9Ff",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc210Ea7D5692a6401ADf25BbCB7aCDe9cDB7e9Ff",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "data": "0x18160ddd",
          "chain": "base"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "asUint": "1687451254752",
          "result": "0x00000000000000000000000000000000000000000000000000000188f2a0c1e0"
        }
      }
    },
    "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": [
                "to",
                "data"
              ],
              "properties": {
                "to": {
                  "type": "string",
                  "description": "Contract address to call."
                },
                "data": {
                  "type": "string",
                  "description": "0x-prefixed calldata: 4-byte selector plus encoded arguments."
                },
                "from": {
                  "type": "string",
                  "description": "Optional caller address, for calls that check msg.sender."
                },
                "block": {
                  "type": "string",
                  "description": "Block tag or number. Defaults to latest."
                },
                "chain": {
                  "type": "string",
                  "description": "base | ethereum | polygon | arbitrum | optimism."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-09-10 13:13Z
Last indexed by Roundhouse: 2026-09-24 10:00Z
Last enriched (probe, favicon, geo): 2026-09-22 21:15Z
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. 16 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 Raw contract call 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=Raw%20contract%20call'
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://flat-rate-llm.kikoribera03.workers.dev/v1/evm/call, 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.