Roundhouse

acproblems.info

One immutable English Pharos article for this exact topic/location URL. Source-backed editorial data with geographic context; no local inspection, quote or production authorization.

SearchUnknowneip155:8453Exactvia cdp
https://acproblems.info/en/topics/warm-air
Settlements · 30d
11
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.11
Verified settled volume
11 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
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 2026-10-26 01:59Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x6Ac716842c089AaeeC8B3041F8096e0823254A84

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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0x6Ac7…54A84. The signed payment is good for 5 minutes.

Paid to
0x6Ac7…54A84
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "paymentFlow": "authorization",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x6Ac716842c089AaeeC8B3041F8096e0823254A84",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {}
      },
      "output": {
        "type": "text",
        "format": "text/html",
        "example": "<!doctype html><html lang=\"en\"><head><link rel=\"canonical\" href=\"https://acproblems.info/en/topics/warm-air\"></head><body><main><h1>warm air</h1><p>Air that never becomes cool is classified separately from low airflow; operating condition and vent temperature pattern narrow the system category.</p></main></body></html>"
      }
    },
    "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",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "string",
              "maxLength": 262144,
              "minLength": 1,
              "description": "UTF-8 HTML TechArticle for the exact canonical URL, including source/dataset metadata and editorial limits. This public example is an excerpt; complete paid results undergo separate minimum-content validation."
            }
          }
        }
      }
    }
  },
  "pharos-resource": {
    "url": "https://acproblems.info/en/topics/warm-air",
    "kind": "matrix-page",
    "domain": "acproblems.info",
    "method": "GET",
    "siteId": "acproblems",
    "dataset": "pharos-master-us-2026-10-17-r1",
    "subject": "warm-air",
    "version": 1,
    "language": "en",
    "maxBytes": 262144,
    "mimeType": "text/html",
    "snapshot": "pharos-matrix-0f498b3b05c9-pharos-master-us-2026-10-17-r1",
    "articleFamily": "topic",
    "retentionDays": 30,
    "siteProductId": "acproblems-review",
    "sourceRevision": "21fd5e58afd6a2c4c5110795388417ca1b856f6cb28dd04f8c38e5c2b674de9c",
    "sourceBodyRevision": "0f498b3b05c90a55f260d74226f6091f1b214e713df381cc6ff2c1f4ca04ce6c"
  },
  "payment-identifier": {
    "info": {
      "required": false
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "required"
      ],
      "properties": {
        "id": {
          "type": "string",
          "pattern": "^[a-zA-Z0-9_-]+$",
          "maxLength": 128,
          "minLength": 16
        },
        "required": {
          "type": "boolean"
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-26 01:59Z
Last indexed by Roundhouse
2026-10-26 17:50Z
Last enriched (probe, favicon, geo)
—
x402 version
2
Max timeout
300s
Liveness probe
Not probed
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 acproblems.info 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=acproblems.info'
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://acproblems.info/en/topics/warm-air, 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.