Roundhouse

Lumen Pre-Sign Check

Lumen Pre-Sign Check: call before signing any EVM transaction or EIP-712 message. Returns {summary, flags[], verdict} (looks_ok | review | do_not_sign_unless_intended). Flags unlimited approvals, Permit/Permit2, setApprovalForAll, admin calls, zero-price Seaport orders, long deadlines, chain and x402 payTo mismatch. Policy: abort on do_not_sign_unless_intended, escalate review. Informational, no simulation. $0.002, not charged on error.

MediaLiveeip155:8453Exactvia cdp
https://lumenworks-x402-decoder.onrender.com/v1/tx/explain
WalletSecurityCalldataeip712Permit
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.
$0.03
Verified settled volume
17 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.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-11 02:41Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xee9790cB3960952F585379F831a89b4e00B4029A

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.

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 0xee97…4029A. The signed payment is good for 2 minutes.

Paid to
0xee97…4029A
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
2000 smallest units
2000units
on eip155:42220 · 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
0xee97…4029A
Token contract
0xD2ab…7F771
Payment window
2 minutes
2000units
on eip155:42220 · 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
0xee97…4029A
Token contract
0xcebA…2118C
Payment window
2 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xee9790cB3960952F585379F831a89b4e00B4029A",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "0xD2ab3C9A02DBBAB236BfEC45D1d755DF4267F771",
    "extra": {
      "name": "Tether America USD",
      "version": "1",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xee9790cB3960952F585379F831a89b4e00B4029A",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:42220",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "0xcebA9300f2b948710d2653dD7B07f33A8B32118C",
    "extra": {
      "name": "USDC",
      "version": "2",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xee9790cB3960952F585379F831a89b4e00B4029A",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:42220",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "chainId": 8453,
          "transaction": {
            "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "data": "0x095ea7b3000000000000000000000000111111125421ca6dc452d289314280a0f8842a65ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
            "value": "0"
          }
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
          "kind": "transaction",
          "risk": "high",
          "flags": [
            {
              "msg": "Unlimited token approval: spender can drain this token at any time.",
              "code": "UNLIMITED_APPROVAL",
              "level": "high"
            }
          ],
          "summary": [
            "Approve 0x111111125421cA6dc452d289314280a0f8842A65 (1inch v6 Router) to spend UNLIMITED units of token 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
          ],
          "toLabel": "USDC (Base)",
          "verdict": "do_not_sign_unless_intended",
          "calldata": {
            "source": "built-in",
            "decoded": {
              "args": [
                "0x111111125421cA6dc452d289314280a0f8842A65",
                "115792089237316195423570985008687907853269984665640564039457584007913129639935"
              ],
              "signature": "approve(address,uint256)"
            },
            "selector": "0x095ea7b3",
            "candidates": [
              {
                "args": [
                  "0x111111125421cA6dc452d289314280a0f8842A65",
                  "115792089237316195423570985008687907853269984665640564039457584007913129639935"
                ],
                "signature": "approve(address,uint256)"
              }
            ],
            "signaturesFound": 1
          },
          "valueWei": "0",
          "disclaimer": "Informational, not a security guarantee. looks_ok does not mean safe. No simulation, no on-chain state (proxy implementations, spender code, balances) is checked."
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "anyOf": [
                {
                  "required": [
                    "transaction"
                  ]
                },
                {
                  "required": [
                    "calldata"
                  ]
                },
                {
                  "required": [
                    "typedData"
                  ]
                }
              ],
              "properties": {
                "chainId": {
                  "type": "number",
                  "description": "Chain the wallet is on; used for chain-mismatch checks"
                },
                "calldata": {
                  "type": "string",
                  "description": "Shortcut: calldata hex when you have no tx object"
                },
                "typedData": {
                  "type": "object",
                  "description": "EIP-712 typed data {domain, types, primaryType, message} (Permit, Permit2, EIP-3009, Seaport…)"
                },
                "transaction": {
                  "type": "object",
                  "required": [
                    "data"
                  ],
                  "properties": {
                    "to": {
                      "type": "string",
                      "description": "Target contract/address (0x…)"
                    },
                    "data": {
                      "type": "string",
                      "description": "Calldata hex (0x…)"
                    },
                    "value": {
                      "type": "string",
                      "description": "Native value in wei (decimal string)"
                    }
                  },
                  "description": "Unsigned EVM transaction"
                },
                "expected_pay_to": {
                  "type": "string",
                  "description": "For x402/EIP-3009 payments: the payTo you expect; mismatch is flagged"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "to": {
                  "type": "string"
                },
                "kind": {
                  "type": "string"
                },
                "risk": {
                  "type": "string"
                },
                "flags": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "msg": {
                        "type": "string"
                      },
                      "code": {
                        "type": "string"
                      },
                      "level": {
                        "type": "string"
                      }
                    }
                  }
                },
                "summary": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  }
                },
                "toLabel": {
                  "type": "string"
                },
                "verdict": {
                  "type": "string"
                },
                "calldata": {
                  "type": "object",
                  "properties": {
                    "source": {
                      "type": "string"
                    },
                    "decoded": {
                      "type": "object",
                      "properties": {
                        "args": {
                          "type": "array",
                          "items": {
                            "type": "string"
                          }
                        },
                        "signature": {
                          "type": "string"
                        }
                      }
                    },
                    "selector": {
                      "type": "string"
                    },
                    "candidates": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "args": {
                            "type": "array",
                            "items": {
                              "type": "string"
                            }
                          },
                          "signature": {
                            "type": "string"
                          }
                        }
                      }
                    },
                    "signaturesFound": {
                      "type": "number"
                    }
                  }
                },
                "valueWei": {
                  "type": "string"
                },
                "disclaimer": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "celo_9c8960fd085e"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  }
}

Provenance

Seen in the source catalog
2026-10-11 02:41Z
Last indexed by Roundhouse
2026-10-12 01:21Z
Last enriched (probe, favicon, geo)
2026-10-11 03:46Z
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. 3 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 Lumen Pre-Sign Check 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=Lumen%20Pre-Sign%20Check'
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://lumenworks-x402-decoder.onrender.com/v1/tx/explain, 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.