Roundhouse AI

Busker Signature Verifier

Verify EVM signatures offline: EIP-191 personal messages, EIP-712 typed data, and x402/EIP-3009 payment authorizations (paste a raw Payment-Signature header) — recovers the signing wallet, checks it against an expected address, and reports the authorization's amount, payee and validity window. No chain reads.

DataLiveeip155:8453Exactvia cdp
https://workbot1.oddsys.org/verify-sig
Signatureeip191eip712eip3009x402
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far.
$0.19
Verified settled volume
68 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 2026-09-17 09:03Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x15459498e1191d8787c83177809bd54022fA18c4

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 0x1545…A18c4. The signed payment is good for 5 minutes.

Paid to
0x1545…A18c4
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x15459498e1191d8787c83177809bd54022fA18c4",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "address": "0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf",
          "message": "Busker x402 verify-sig example",
          "signature": "0x8f83ce1348bb56eb6d7ede8f6c6787adc3897839e686a0b305fb87e7cd248d5555c7405f0e776b995be1971d6ed71a95541d19635e354f807d94c9326c22a1cb1c"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "body": {
          "mode": "string (eip191|eip712|eip3009|x402-header)",
          "valid": "boolean — signature recovered to an address",
          "amount": "object — { usdc } for known USDC contracts",
          "checks": "object (x402-header) — payToMatches, amountMatches, network, scheme",
          "signer": "string|null — recovered EOA",
          "window": "object — { validAfter, validBefore, validNow }",
          "matches": "boolean (when address given) / matchesFrom (authorization modes)",
          "messageHash": "string (eip191) / digest (typed modes)",
          "authorization": "object (authorization modes) — from, to, value, validAfter, validBefore, nonce"
        },
        "example": {
          "mode": "eip191",
          "valid": true,
          "signer": "0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf",
          "address": "0x7E5F4552091A69125d5DfCb7b8C2659029395Bdf",
          "matches": true,
          "messageHash": "0x0c9b1f4d5f2b6e7a4d3c2b1a0f9e8d7c6b5a4f3e2d1c0b9a8f7e6d5c4b3a2f1e"
        },
        "bodyType": "json"
      }
    },
    "schema": {
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "properties": {
                "domain": {
                  "type": "object",
                  "description": "Explicit EIP-712 domain { name, version, chainId, verifyingContract } for a non-USDC token."
                },
                "address": {
                  "type": "string",
                  "description": "Expected signer; when given the response carries a matches boolean."
                },
                "message": {
                  "type": "string",
                  "description": "Plain message that was signed with personal_sign (EIP-191)."
                },
                "network": {
                  "type": "string",
                  "description": "CAIP-2 network for authorization mode (default eip155:8453 = USDC on Base)."
                },
                "signature": {
                  "type": "string",
                  "description": "0x-prefixed 65-byte signature."
                },
                "typedData": {
                  "type": "object",
                  "description": "EIP-712 payload { domain, types, primaryType, message } exactly as signed."
                },
                "authorization": {
                  "type": "object",
                  "description": "EIP-3009 TransferWithAuthorization fields { from, to, value, validAfter, validBefore, nonce } (the x402 payload.authorization object)."
                },
                "paymentHeader": {
                  "type": "string",
                  "description": "Raw base64 value of an x402 Payment-Signature / X-Payment header; decoded and verified in one step."
                }
              },
              "description": "Exactly one of: message (EIP-191), typedData (EIP-712), authorization (EIP-3009 / x402 exact-EVM), paymentHeader (raw base64 Payment-Signature or X-Payment header). signature is required except with paymentHeader.",
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        }
      }
    },
    "routeTemplate": "/verify-sig"
  }
}

Provenance

Seen in the source catalog
2026-09-17 09:03Z
Last indexed by Roundhouse
2026-09-24 13:10Z
Last enriched (probe, favicon, geo)
2026-09-17 10:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 405
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. 7 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 Busker Signature Verifier 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=Busker%20Signature%20Verifier'
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://workbot1.oddsys.org/verify-sig, 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.