Roundhouse

agent.connskill.com

Market data and real-world actions for AI agents: SEO and SERP research, SMS verification, social marketing. Pay per call with USDC on Base via x402. No account, no API key, no minimum.

InfraLiveeip155:8453Exactvia cdp
https://agent.connskill.com/chain/v1/chain-state
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 28 snapshots so far.
$19.15
Verified settled volume
229 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
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.
1
Unique payers · 30d
Last called 2026-09-08 07:00Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE

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",
  "status": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "label": "Wallet/contract state on 5 EVM chains in one call: native balance, nonce, EOA-or-contract (EIP-7702-aware), ERC-20 balances with symbol and decimals ($0.05)",
        "version": "2"
      },
      "payTo": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE",
      "amount": "50000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://agent.connskill.com/chain/v1/chain-state",
      "description": "Wallet/contract state on 5 EVM chains in one call: native balance, nonce, EOA-or-contract (EIP-7702-aware), ERC-20 balances with symbol and decimals",
      "outputSchema": {
        "input": {
          "type": "http",
          "method": "POST",
          "bodyType": "json",
          "bodyFields": {
            "chain": {
              "type": "string",
              "required": true,
              "description": "One of: base, ethereum, arbitrum, optimism, polygon"
            },
            "tokens": {
              "type": "array",
              "required": false,
              "description": "ERC-20 contracts to read balances for, max 10"
            },
            "address": {
              "type": "string",
              "required": true,
              "description": "Wallet or contract address (0x…, 40 hex)"
            }
          }
        },
        "output": {
          "type": "object",
          "properties": {
            "native": {
              "type": "object"
            },
            "status": {
              "type": "string"
            },
            "tokens": {
              "type": "array"
            }
          }
        }
      },
      "maxAmountRequired": "50000",
      "maxTimeoutSeconds": 120
    }
  ],
  "service": {
    "mode": "live",
    "price": {
      "payTo": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE",
      "amount": "0.02-0.05",
      "network": "eip155:8453",
      "currency": "USDC"
    },
    "scope": "read-only EVM state and simulation — no custody, no transfers, no key handling",
    "serviceId": "onchain-v1"
  },
  "howToPay": "Pay $0.05 USDC on Base with a signed x402 authorization (PAYMENT-SIGNATURE header), then repeat the POST.",
  "resource": {
    "url": "https://agent.connskill.com/chain/v1/chain-state",
    "mimeType": "application/json",
    "description": "Wallet/contract state on 5 EVM chains in one call: native balance, nonce, EOA-or-contract (EIP-7702-aware), ERC-20 balances with symbol and decimals"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "chain": "base",
            "tokens": [
              "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
            ],
            "address": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "chain": "base",
            "nonce": 42,
            "native": {
              "wei": "1234500000000000000",
              "formatted": "1.2345"
            },
            "status": "delivered",
            "tokens": [
              {
                "symbol": "USDC",
                "balance": "31.58",
                "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "decimals": 6,
                "balanceRaw": "31580000"
              }
            ],
            "address": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE",
            "codeKind": "eoa",
            "isContract": false
          }
        }
      },
      "schema": {
        "properties": {
          "input": {
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "chain",
                  "address"
                ],
                "properties": {
                  "chain": {
                    "enum": [
                      "base",
                      "ethereum",
                      "arbitrum",
                      "optimism",
                      "polygon"
                    ],
                    "type": "string"
                  },
                  "tokens": {
                    "type": "array",
                    "items": {
                      "type": "string",
                      "pattern": "^0x[0-9a-fA-F]{40}$"
                    },
                    "maxItems": 10,
                    "description": "Optional ERC-20 contract addresses to read balances for (max 10)"
                  },
                  "address": {
                    "type": "string",
                    "pattern": "^0x[0-9a-fA-F]{40}$",
                    "description": "Wallet or contract address"
                  }
                }
              }
            }
          },
          "output": {
            "properties": {
              "example": {
                "chain": "base",
                "nonce": 42,
                "native": {
                  "wei": "1234500000000000000",
                  "formatted": "1.2345"
                },
                "status": "delivered",
                "tokens": [
                  {
                    "symbol": "USDC",
                    "balance": "31.58",
                    "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                    "decimals": 6,
                    "balanceRaw": "31580000"
                  }
                ],
                "address": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE",
                "codeKind": "eoa",
                "isContract": false
              }
            }
          }
        }
      }
    }
  },
  "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.

0.05USDC≈ $0.05 USD
on Base · exact scheme

Pay 0.05 USDC on Base to 0x43B8…f63dE. The signed payment is good for 2 minutes.

Paid to
0x43B8…f63dE
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
50000 smallest units
Buys
Wallet/contract state on 5 EVM chains in one call: native balance, nonce, EOA-or-contract (EIP-7702-aware), ERC-20 balances with symbol and decimals
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "label": "Wallet/contract state on 5 EVM chains in one call: native balance, nonce, EOA-or-contract (EIP-7702-aware), ERC-20 balances with symbol and decimals ($0.05)",
      "version": "2"
    },
    "payTo": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://agent.connskill.com/chain/v1/chain-state",
    "description": "Wallet/contract state on 5 EVM chains in one call: native balance, nonce, EOA-or-contract (EIP-7702-aware), ERC-20 balances with symbol and decimals",
    "outputSchema": {
      "input": {
        "type": "http",
        "method": "POST",
        "bodyType": "json",
        "bodyFields": {
          "chain": {
            "type": "string",
            "required": true,
            "description": "One of: base, ethereum, arbitrum, optimism, polygon"
          },
          "tokens": {
            "type": "array",
            "required": false,
            "description": "ERC-20 contracts to read balances for, max 10"
          },
          "address": {
            "type": "string",
            "required": true,
            "description": "Wallet or contract address (0x…, 40 hex)"
          }
        }
      },
      "output": {
        "type": "object",
        "properties": {
          "native": {
            "type": "object"
          },
          "status": {
            "type": "string"
          },
          "tokens": {
            "type": "array"
          }
        }
      }
    },
    "maxAmountRequired": "50000",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "chain": "base",
          "tokens": [
            "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
          ],
          "address": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "base",
          "nonce": 42,
          "native": {
            "wei": "1234500000000000000",
            "formatted": "1.2345"
          },
          "status": "delivered",
          "tokens": [
            {
              "symbol": "USDC",
              "balance": "31.58",
              "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "decimals": 6,
              "balanceRaw": "31580000"
            }
          ],
          "address": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE",
          "codeKind": "eoa",
          "isContract": false
        }
      }
    },
    "schema": {
      "properties": {
        "input": {
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "chain",
                "address"
              ],
              "properties": {
                "chain": {
                  "enum": [
                    "base",
                    "ethereum",
                    "arbitrum",
                    "optimism",
                    "polygon"
                  ],
                  "type": "string"
                },
                "tokens": {
                  "type": "array",
                  "items": {
                    "type": "string",
                    "pattern": "^0x[0-9a-fA-F]{40}$"
                  },
                  "maxItems": 10,
                  "description": "Optional ERC-20 contract addresses to read balances for (max 10)"
                },
                "address": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "description": "Wallet or contract address"
                }
              }
            }
          }
        },
        "output": {
          "properties": {
            "example": {
              "chain": "base",
              "nonce": 42,
              "native": {
                "wei": "1234500000000000000",
                "formatted": "1.2345"
              },
              "status": "delivered",
              "tokens": [
                {
                  "symbol": "USDC",
                  "balance": "31.58",
                  "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                  "decimals": 6,
                  "balanceRaw": "31580000"
                }
              ],
              "address": "0x43B85AE58f0A2505c710Bc715d6f3EB16b1f63dE",
              "codeKind": "eoa",
              "isContract": false
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-08 07:00Z
Last indexed by Roundhouse
2026-09-24 11:00Z
Last enriched (probe, favicon, geo)
2026-09-13 03:15Z
x402 version
2
Max timeout
120s
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. 28 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 agent.connskill.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=agent.connskill.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://agent.connskill.com/chain/v1/chain-state, 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.