Roundhouse

HALOWERK kettenwerk

HALOWERK provides paid endpoints that AI agents call and pay for per request via x402 on Base. No account, no API key, no signup.

SearchLiveeip155:8453Exactvia cdp
https://kette.halowerk.com/token/unlocks
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 25 snapshots so far.
$11.47
Verified settled volume
2,654 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0080
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 2026-08-30 18:53Z
—
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://kette.halowerk.com/llms.txt",
  "name": "token_unlock_monitor",
  "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": "8000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "pricing": "https://kette.halowerk.com/pricing",
  "summary": "Returns upcoming, source-backed token unlocks for a tracked crypto asset, including the exact token amount, lock count, enforcement basis and each release as a percentage of current circulating supply.",
  "resource": {
    "url": "https://kette.halowerk.com/token/unlocks",
    "iconUrl": "https://kette.halowerk.com/favicon.svg",
    "mimeType": "application/json",
    "description": "Looks up a crypto asset by its exact NetSupply slug or an unambiguous symbol, then returns the scheduled releases inside a caller-selected window of up to 365 days. Unlock amounts remain decimal strings so large token quantities are not rounded. Each event states whether the schedule is enforced on-chain, how many lock objects it combines, when the promise was first recorded and how often it was revised. The percentage of float uses current circulating supply from CoinGecko, or a caller-supplied",
    "serviceName": "HALOWERK kettenwerk"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
          },
          "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",
                "required": [
                  "asset"
                ],
                "properties": {
                  "days": {
                    "type": "integer",
                    "default": 90,
                    "maximum": 365,
                    "minimum": 1,
                    "description": "Calendar window from today in UTC, inclusive. Default 90 days."
                  },
                  "asset": {
                    "type": "string",
                    "maxLength": 80,
                    "minLength": 1,
                    "description": "Exact NetSupply slug such as \"xrp\" or an unambiguous token symbol such as \"XRP\"."
                  },
                  "circulating_supply": {
                    "type": "number",
                    "description": "Optional current circulating supply. When omitted, CoinGecko is used. The response always identifies which basis was used.",
                    "exclusiveMinimum": 0
                  }
                },
                "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": "0.008",
  "description": "Looks up a crypto asset by its exact NetSupply slug or an unambiguous symbol, then returns the scheduled releases inside a caller-selected window of up to 365 days. Unlock amounts remain decimal strings so large token quantities are not rounded. Each event states whether the schedule is enforced on-chain, how many lock objects it combines, when the promise was first recorded and how often it was revised. The percentage of float uses current circulating supply from CoinGecko, or a caller-supplied circulating_supply when reproducibility against another published supply figure matters. Current float is not projected float at the release date. Coverage is limited to schedules published by NetSupply; an empty list means no published event in the selected window, not proof that no private, discretionary or undocumented release exists. NetSupply attribution is included in every response as required by its commercial API licence. This is supply analysis, not price prediction or investment advice.",
  "inputSchema": {
    "type": "object",
    "required": [
      "asset"
    ],
    "properties": {
      "days": {
        "type": "integer",
        "default": 90,
        "maximum": 365,
        "minimum": 1,
        "description": "Calendar window from today in UTC, inclusive. Default 90 days."
      },
      "asset": {
        "type": "string",
        "maxLength": 80,
        "minLength": 1,
        "description": "Exact NetSupply slug such as \"xrp\" or an unambiguous token symbol such as \"XRP\"."
      },
      "circulating_supply": {
        "type": "number",
        "description": "Optional current circulating supply. When omitted, CoinGecko is used. The response always identifies which basis was used.",
        "exclusiveMinimum": 0
      }
    },
    "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"
  },
  "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.

0.008USDC≈ $0.008 USD
on Base · exact scheme

Pay 0.008 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
8000 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": "8000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        },
        "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",
              "required": [
                "asset"
              ],
              "properties": {
                "days": {
                  "type": "integer",
                  "default": 90,
                  "maximum": 365,
                  "minimum": 1,
                  "description": "Calendar window from today in UTC, inclusive. Default 90 days."
                },
                "asset": {
                  "type": "string",
                  "maxLength": 80,
                  "minLength": 1,
                  "description": "Exact NetSupply slug such as \"xrp\" or an unambiguous token symbol such as \"XRP\"."
                },
                "circulating_supply": {
                  "type": "number",
                  "description": "Optional current circulating supply. When omitted, CoinGecko is used. The response always identifies which basis was used.",
                  "exclusiveMinimum": 0
                }
              },
              "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
2026-08-30 18:53Z
Last indexed by Roundhouse
2026-09-24 11:00Z
Last enriched (probe, favicon, geo)
2026-09-22 04:15Z
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. 25 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 kettenwerk 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%20kettenwerk'
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://kette.halowerk.com/token/unlocks, 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.