Roundhouse AI

x402-payment-debug

Your 402 envelope can pass every static check and still not get you paid. We build a real signed payment at your listed price and submit it to the CDP facilitator verify endpoint, which checks signature, requirements and the on-chain transfer simulation. Nothing settles, so no money moves. You get back whether a real payment would be accepted, and if not, the facilitator own reason verbatim. Pass ?url= or ?domain=.

TradingLiveeip155:8453Exactvia cdp
https://x402.dailyelo.com/v1/payment/debug
x402DiagnosticsSeller-toolsPaymentsVerify
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 8 snapshots so far.
$4.93
Verified settled volume
326 settlements proven x402 by their on-chain EIP-3009 marker.
$0.250
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 2026-08-01 21:04Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xD617a7145ca56E3ed58d639F9DEC6999B22441eE

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.

0.25USDC≈ $0.25 USD
on Base · exact scheme

Pay 0.25 USDC on Base to 0xD617…441eE. The signed payment is good for 5 minutes.

Paid to
0xD617…441eE
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
250000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xD617a7145ca56E3ed58d639F9DEC6999B22441eE",
    "amount": "250000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "domain": "your-service.com"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "you": {
            "url": "https://your-service.com/v1/thing",
            "verified": true,
            "price_usd": 0.001,
            "description_chars": 22,
            "facilitator_message": null,
            "facilitator_invalid_reason": "amount_too_low",
            "would_a_real_payment_be_accepted": false
          },
          "market": {
            "verified": 1180,
            "can_receive_payment": 1052,
            "cannot_receive_payment": 128
          },
          "schema": "paymentdebug/v1",
          "observed": true,
          "test_balance_usd": 0.19
        }
      }
    },
    "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",
              "properties": {
                "url": {
                  "type": "string",
                  "description": "your endpoint URL"
                },
                "domain": {
                  "type": "string",
                  "description": "or just your domain"
                }
              },
              "description": "Would a real payment to your x402 endpoint actually be accepted? We build a signed payment at your listed price and submit it to the CDP facilitator's verify endpoint — signature, requirements and on-chain transfer simulation. Nothing settles, so no money moves. If it fails you get the facilitator's own reason verbatim. ?url= or ?domain=; omit for market-wide stats."
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-08-01 21:04Z
Last indexed by Roundhouse
2026-08-31 20:50Z
Last enriched (probe, favicon, geo)
2026-09-13 13:15Z
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. 8 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 x402-payment-debug 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=x402-payment-debug'
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://x402.dailyelo.com/v1/payment/debug, 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.