Roundhouse

402utils.com

Micro API utilities for AI agents, priced per call and paid in USDC over the x402 protocol. PDF, screenshot, OG-image and more — no signup, no keys.

DataLiveeip155:8453Exactvia cdp
https://402utils.com/v1/phone-check
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$1.69
Verified settled volume
705 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 2026-08-24 00:46Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xc55A2D530b53CBaD1001e4AfD4720B7E71f9C291

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.

{
  "hint": "This endpoint is paid via the x402 protocol. Decode the base64 PAYMENT-REQUIRED response header for payment requirements, or retry with an x402 v2 client.",
  "error": "payment_required"
}

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 0xc55A…9C291. The signed payment is good for 1 minute.

Paid to
0xc55A…9C291
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
2000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xc55A2D530b53CBaD1001e4AfD4720B7E71f9C291",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "phone": "+442079460958"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "e164": "+442079460958",
          "type": "fixed_line",
          "valid": true,
          "country": "GB",
          "national": "020 7946 0958",
          "possible": true,
          "international": "+44 20 7946 0958"
        }
      }
    },
    "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",
              "required": [
                "phone"
              ],
              "properties": {
                "phone": {
                  "type": "string",
                  "description": "The number, E.164 (+33612345678) or national."
                },
                "attest": {
                  "type": "string",
                  "description": "Set to 1 for an Ed25519-signed attestation of the result (audit trail)."
                },
                "country": {
                  "type": "string",
                  "description": "ISO alpha-2 default country for national input."
                }
              },
              "description": "Query params. `phone` required; `country` helps parse national formats."
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "valid"
              ],
              "properties": {
                "e164": {
                  "type": "string"
                },
                "type": {
                  "type": "string",
                  "description": "mobile | fixed_line | fixed_line_or_mobile | toll_free | premium_rate | voip | … — absent when the plan does not distinguish."
                },
                "valid": {
                  "type": "boolean",
                  "description": "Strict validity per the national numbering plan."
                },
                "country": {
                  "type": "string",
                  "description": "Detected ISO alpha-2; absent when undeterminable."
                },
                "national": {
                  "type": "string"
                },
                "possible": {
                  "type": "boolean",
                  "description": "Length-plausibility (looser than valid)."
                },
                "attestation": {
                  "type": "object",
                  "properties": {
                    "alg": {
                      "type": "string",
                      "const": "Ed25519"
                    },
                    "sig": {
                      "type": "string",
                      "description": "base64url Ed25519 signature over the canonical JSON of payload."
                    },
                    "payload": {
                      "type": "object",
                      "properties": {
                        "ts": {
                          "type": "string",
                          "format": "date-time"
                        },
                        "kid": {
                          "type": "string",
                          "description": "Key id — matches a key in the .well-known document."
                        },
                        "endpoint": {
                          "type": "string"
                        },
                        "resultSha256": {
                          "type": "string",
                          "description": "SHA-256 of the canonical JSON of the result (attestation excluded)."
                        }
                      }
                    }
                  },
                  "description": "Present only with ?attest=1. Ed25519 signature over the canonical result; verify against /.well-known/402utils-attestation.json."
                },
                "international": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-08-24 00:46Z
Last indexed by Roundhouse
2026-09-23 00:50Z
Last enriched (probe, favicon, geo)
2026-09-23 18:45Z
x402 version
2
Max timeout
60s
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. 30 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 402utils.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=402utils.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://402utils.com/v1/phone-check, 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.