x402 Challenge Policy Check

Name: x402 Challenge Policy Check
Price: 0.0035 USDC
Availability: InStock

Inspect one supplied x402-v2 exact-payment challenge against an explicit expected HTTPS resource, EVM CAIP-2 network, asset, payee and maximum price. Checks both URL declarations, structure and payment-policy fields only; no live probe, payment, facilitator verification or server-authenticity claim.

SearchLiveeip155:8453Exactvia cdp

https://www.mahastrategies.com/api/v1/micro/x402-challenge-sanity

Bounded-computationEvidenceDeterministicMicroproductExpansion-20261011

Calls · 30d

2→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 20 snapshots so far.

$71.48

Verified settled volume

1,272 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0035

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-11 10:37Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xec84c1cd6602bbe387bc8e6f0d3c062f2762de28

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.

0.0035USDC≈ $0.0035 USD

on Base · exact scheme

Pay 0.0035 USDC on Base to 0xec84…2de28. The signed payment is good for 1 minute.

Paid to: 0xec84…2de28
USD Coin contract: 0x8335…02913
Payment window: 1 minute
As published: 3500 smallest units

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xec84c1cd6602bbe387bc8e6f0d3c062f2762de28",
    "amount": "3500",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "expected": {
            "asset": "0x1111111111111111111111111111111111111111",
            "payee": "0x1111111111111111111111111111111111111111",
            "network": "eip155:8453",
            "resourceUrl": "https://example.org/result",
            "maxAmountBaseUnits": "10000"
          },
          "challenge": {
            "asset": "0x1111111111111111111111111111111111111111",
            "payee": "0x1111111111111111111111111111111111111111",
            "scheme": "exact",
            "network": "eip155:8453",
            "version": 2,
            "resourceUrl": "https://example.org/result",
            "amountBaseUnits": "10000",
            "maxTimeoutSeconds": 60
          },
          "dataClass": "synthetic"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "result": {
            "issues": [],
            "consistent": true,
            "liveServerVerified": false,
            "executionAuthorized": false
          },
          "offerId": "x402-challenge-sanity",
          "version": "maha-microproducts/0.1",
          "boundaries": [
            "Public or synthetic inputs only. Caller labels are declarations,…"
          ],
          "inputDigest": "sha256:0f2f32610c46537b318d31712df444db18cc48b352bcb6b56b09860e5…",
          "receiptDigest": "sha256:966ff5c0e4c19b0662cb3345b9b708e26a982aaa82188aebe21a40f8a…",
          "amountBaseUnits": "3500"
        }
      }
    },
    "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": {
              "type": "object",
              "required": [
                "dataClass",
                "expected",
                "challenge"
              ],
              "properties": {
                "expected": {
                  "type": "object"
                },
                "challenge": {
                  "type": "object"
                },
                "dataClass": {
                  "enum": [
                    "public",
                    "synthetic"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "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",
              "required": [
                "version",
                "offerId",
                "amountBaseUnits",
                "inputDigest",
                "result",
                "boundaries",
                "receiptDigest"
              ],
              "properties": {
                "result": {
                  "type": "object"
                },
                "offerId": {
                  "enum": [
                    "x402-challenge-sanity"
                  ],
                  "type": "string"
                },
                "version": {
                  "enum": [
                    "maha-microproducts/0.1"
                  ],
                  "type": "string"
                },
                "boundaries": {
                  "type": "array",
                  "maxItems": 128,
                  "minItems": 0
                },
                "inputDigest": {
                  "type": "string",
                  "maxLength": 71
                },
                "receiptDigest": {
                  "type": "string",
                  "maxLength": 71
                },
                "amountBaseUnits": {
                  "enum": [
                    "3500"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    }
  },
  "maha-offer": {
    "asset": "USDC",
    "amount": "3500",
    "method": "POST",
    "status": "available",
    "network": "eip155:8453",
    "offerId": "x402-challenge-sanity",
    "assetDecimals": 6,
    "declarationUrl": "https://www.mahastrategies.com/api/discovery/x402-offers/x402-challenge-sanity",
    "maxRequestBytes": 32768,
    "canonicalResource": "https://www.mahastrategies.com/api/v1/micro/x402-challenge-sanity",
    "declarationInline": "compact",
    "payableInProduction": true,
    "fullSourceTextStored": false,
    "verbatimExcerptsRetained": false
  },
  "declaration-integrity": {
    "metadataVersion": "2026-08-10",
    "canonicalResource": "https://www.mahastrategies.com/api/v1/micro/x402-challenge-sanity",
    "declarationDigest": "sha256:886e30d7f09ad7d67fa9073edd6588750b62ee5577af44f23b6c55a0421d57ed"
  }
}

Provenance

Seen in the source catalog: 2026-10-11 10:37Z
Last indexed by Roundhouse: 2026-10-26 15:00Z
Last enriched (probe, favicon, geo): 2026-10-11 09:46Z
x402 version: 2
Max timeout: 60s
Liveness probe: HTTP 200

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. 20 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 Challenge Policy 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=x402%20Challenge%20Policy%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://www.mahastrategies.com/api/v1/micro/x402-challenge-sanity, 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.