HALOWERK x402werk

Name: HALOWERK x402werk
Price: 0.002 USDC
Availability: InStock

Validates a 402 challenge — fetched from a URL without paying, or supplied directly — against PaymentRequiredV1Schema and PaymentRequiredV2Schema of the installed @x402/core reference implementation. Reports the detected version and how it was detected, every error with field, expected, found and spec_ref naming package, version, schema and field path, whether the network is valid CAIP-2, whether the asset is a known and canonical token address or a bridged variant, whether the declared inputSch

OtherLiveeip155:8453Exactvia cdp

https://x402.halowerk.com/offer/validate

Calls · 30d

1→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 16 snapshots so far.

$11.47

Verified settled volume

2,654 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.

Calls · 30d

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

Unique payers · 30d

Last called 2026-08-09 09:46Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E

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.

{
  "docs": "https://x402.halowerk.com/llms.txt",
  "name": "validate_requirements",
  "error": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "asset": "USDC",
        "version": "2",
        "eip712Domain": {
          "name": "USD Coin",
          "chainId": 8453,
          "version": "2",
          "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        },
        "network_name": "Base Mainnet",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "pricing": "https://x402.halowerk.com/pricing",
  "summary": "Checks an x402 payment challenge against the schemas of the x402 Foundation reference implementation and names every deviation with field, expectation, finding and the schema clause that rejected it.",
  "resource": {
    "url": "https://x402.halowerk.com/offer/validate",
    "iconUrl": "https://x402.halowerk.com/favicon.svg",
    "mimeType": "application/json",
    "description": "Validates a 402 challenge — fetched from a URL without paying, or supplied directly — against PaymentRequiredV1Schema and PaymentRequiredV2Schema of the installed @x402/core reference implementation. Reports the detected version and how it was detected, every error with field, expected, found and spec_ref naming package, version, schema and field path, whether the network is valid CAIP-2, whether the asset is a known and canonical token address or a bridged variant, whether the declared inputSch",
    "serviceName": "HALOWERK x402werk"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "url": "https://example.com",
            "challenge": {}
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        }
      },
      "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",
                "anyOf": [
                  {
                    "required": [
                      "url"
                    ]
                  },
                  {
                    "required": [
                      "challenge"
                    ]
                  }
                ],
                "properties": {
                  "url": {
                    "type": "string",
                    "pattern": "^https?://",
                    "maxLength": 2048,
                    "description": "Absolute http or https URL whose 402 challenge should be fetched and validated. Nothing is paid. Private, loopback and link-local targets are rejected."
                  },
                  "challenge": {
                    "type": "object",
                    "description": "A 402 challenge object to validate directly, in x402 v1 or v2 form."
                  },
                  "timeout_ms": {
                    "type": "integer",
                    "default": 6000,
                    "maximum": 12000,
                    "minimum": 1000,
                    "description": "Time budget for fetching the foreign challenge."
                  }
                },
                "additionalProperties": false
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      }
    }
  },
  "price_usdc": "0.002",
  "description": "Validates a 402 challenge — fetched from a URL without paying, or supplied directly — against PaymentRequiredV1Schema and PaymentRequiredV2Schema of the installed @x402/core reference implementation. Reports the detected version and how it was detected, every error with field, expected, found and spec_ref naming package, version, schema and field path, whether the network is valid CAIP-2, whether the asset is a known and canonical token address or a bridged variant, whether the declared inputSchema compiles as a JSON Schema, which protocol extensions are declared and which of them are known, and whether v1-only and v2-only clients could each act on this offer. price_sane flags amounts whose magnitude typically comes from a wrong decimal place; its thresholds are stated in the answer and it is reported as null wherever the asset is not a known stablecoin, since without a price feed that question cannot be answered honestly. This endpoint judges conformance only. It does not rate the service, does not say whether a price is fair, does not pay and does not verify signatures — signatures are Nr. 85.",
  "inputSchema": {
    "type": "object",
    "anyOf": [
      {
        "required": [
          "url"
        ]
      },
      {
        "required": [
          "challenge"
        ]
      }
    ],
    "properties": {
      "url": {
        "type": "string",
        "pattern": "^https?://",
        "maxLength": 2048,
        "description": "Absolute http or https URL whose 402 challenge should be fetched and validated. Nothing is paid. Private, loopback and link-local targets are rejected."
      },
      "challenge": {
        "type": "object",
        "description": "A 402 challenge object to validate directly, in x402 v1 or v2 form."
      },
      "timeout_ms": {
        "type": "integer",
        "default": 6000,
        "maximum": 12000,
        "minimum": 1000,
        "description": "Time budget for fetching the foreign challenge."
      }
    },
    "additionalProperties": false
  },
  "price_model": "per_call",
  "x402Version": 2,
  "instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
  "outputSchema": {
    "type": "object",
    "properties": {
      "cache": {
        "enum": [
          "hit",
          "miss"
        ],
        "type": "string"
      },
      "valid": {
        "type": "boolean"
      },
      "age_ms": {
        "type": [
          "integer",
          "null"
        ]
      },
      "errors": {
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            "feld": {
              "type": "string"
            },
            "problem": {
              "type": "string"
            },
            "erwartet": {
              "type": "string"
            },
            "gefunden": {
              "type": [
                "string",
                "null"
              ]
            },
            "spec_ref": {
              "type": "string"
            }
          }
        }
      },
      "warnings": {
        "type": "array",
        "items": {
          "type": "object"
        }
      },
      "caip_valid": {
        "type": [
          "boolean",
          "null"
        ]
      },
      "extensions": {
        "type": "array",
        "items": {
          "type": "object"
        }
      },
      "price_sane": {
        "type": [
          "boolean",
          "null"
        ]
      },
      "ts_fetched": {
        "type": [
          "integer",
          "null"
        ]
      },
      "asset_known": {
        "type": [
          "boolean",
          "null"
        ]
      },
      "schema_valid": {
        "type": [
          "boolean",
          "null"
        ]
      },
      "compatibility": {
        "type": "object",
        "properties": {
          "v1_clients": {
            "type": "boolean"
          },
          "v2_clients": {
            "type": "boolean"
          }
        }
      },
      "spec_reference": {
        "type": "object"
      },
      "asset_canonical": {
        "type": [
          "boolean",
          "null"
        ]
      },
      "thresholds_used": {
        "type": "object"
      },
      "version_detected": {
        "enum": [
          "v1",
          "v2",
          "unklar"
        ],
        "type": "string"
      },
      "unavailable_fields": {
        "type": "array",
        "items": {
          "type": "string"
        }
      }
    }
  },
  "payment_header": "PAYMENT-SIGNATURE",
  "capability_request": {
    "url": "https://bedarf.halowerk.com/capabilities/request",
    "cost": "free",
    "method": "POST",
    "description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
    "body_example": {
      "max_price": 0.01,
      "description": "what exactly is needed",
      "requested_capability": "short label"
    }
  }
}

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 0x2880…C4E5E. The signed payment is good for 5 minutes.

Paid to: 0x2880…C4E5E
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",
      "asset": "USDC",
      "version": "2",
      "eip712Domain": {
        "name": "USD Coin",
        "chainId": 8453,
        "version": "2",
        "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
      },
      "network_name": "Base Mainnet",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "url": "https://example.com",
          "challenge": {}
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      }
    },
    "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",
              "anyOf": [
                {
                  "required": [
                    "url"
                  ]
                },
                {
                  "required": [
                    "challenge"
                  ]
                }
              ],
              "properties": {
                "url": {
                  "type": "string",
                  "pattern": "^https?://",
                  "maxLength": 2048,
                  "description": "Absolute http or https URL whose 402 challenge should be fetched and validated. Nothing is paid. Private, loopback and link-local targets are rejected."
                },
                "challenge": {
                  "type": "object",
                  "description": "A 402 challenge object to validate directly, in x402 v1 or v2 form."
                },
                "timeout_ms": {
                  "type": "integer",
                  "default": 6000,
                  "maximum": 12000,
                  "minimum": 1000,
                  "description": "Time budget for fetching the foreign challenge."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-08-09 09:46Z
Last indexed by Roundhouse: 2026-09-08 09:30Z
Last enriched (probe, favicon, geo): 2026-09-20 19:15Z
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. 16 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 HALOWERK x402werk 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=HALOWERK%20x402werk'
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.halowerk.com/offer/validate, 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.