Api Endpoint

finanz.halowerk.com

Returns the current fee rates for the usual confirmation targets together with the state of the mempool behind them, and then does the part that is usually missing: it estimates the virtual size of the transaction you describe and computes the resulting total fee in satoshis for each target.

Open interactive test console

Offering

Provider: finanz.halowerk.com
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Blockchain And Crypto
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://finanz.halowerk.com/v1/bitcoin-fee-forecast
MIME type: Not provided
First seen: 2026-10-16T01:57:40.935Z
Last seen: 2026-11-01T15:24:33.269Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.004 USDC
Atomic price: 4000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "4000",
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E"
  }
]

Observed health

Status: Healthy
Latest latency: 310 ms
Average latency: 902 ms
HTTP status: 204
Last checked: 2026-11-04T04:05:11.946Z
Reachability: 100% over 10 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "additionalProperties": false,
      "properties": {
        "input_type": {
          "default": "p2wpkh",
          "enum": [
            "p2wpkh",
            "p2tr",
            "p2sh_p2wpkh",
            "p2pkh"
          ],
          "type": "string"
        },
        "inputs": {
          "default": 1,
          "description": "Number of inputs your transaction spends. This is what drives the cost.",
          "maximum": 500,
          "minimum": 1,
          "type": "integer"
        },
        "output_type": {
          "default": "p2wpkh",
          "enum": [
            "p2wpkh",
            "p2tr",
            "p2sh",
            "p2pkh"
          ],
          "type": "string"
        },
        "outputs": {
          "default": 2,
          "description": "Number of outputs, usually recipient plus change.",
          "maximum": 500,
          "minimum": 1,
          "type": "integer"
        }
      },
      "type": "object"
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ],
      "type": "string"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "additionalProperties": false,
          "properties": {
            "input_type": {
              "default": "p2wpkh",
              "enum": [
                "p2wpkh",
                "p2tr",
                "p2sh_p2wpkh",
                "p2pkh"
              ],
              "type": "string"
            },
            "inputs": {
              "default": 1,
              "description": "Number of inputs your transaction spends. This is what drives the cost.",
              "maximum": 500,
              "minimum": 1,
              "type": "integer"
            },
            "output_type": {
              "default": "p2wpkh",
              "enum": [
                "p2wpkh",
                "p2tr",
                "p2sh",
                "p2pkh"
              ],
              "type": "string"
            },
            "outputs": {
              "default": 2,
              "description": "Number of outputs, usually recipient plus change.",
              "maximum": 500,
              "minimum": 1,
              "type": "integer"
            }
          },
          "type": "object"
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}