Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

Returns the current fee rates for the usual confirmation targets together with the state o

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.

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4000 (raw units)
price
2
calls / 30d
2
unique payers
2026-09-12
updated

Provider

finanz.halowerk.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "4000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "input_type": "p2wpkh",
          "inputs": 3,
          "outputs": 2
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      }
    },
    "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"
    }
  }
}

Use it

curl

curl "https://finanz.halowerk.com/v1/bitcoin-fee-forecast"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://finanz.halowerk.com/v1/bitcoin-fee-forecast");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://finanz.halowerk.com/v1/bitcoin-fee-forecast")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/15351.json, and this resource appears in /discovery/resources and /discovery/search.