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finanz.halowerk.com v1 bitcoin-fee-forecast
https://finanz.halowerk.com/v1/bitcoin-fee-forecast
answers 402
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.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.004
- Network
- base
- Pay to
- 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 575 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:23:41.842Z (23d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Ffinanz.halowerk.com%2Fv1%2Fbitcoin-fee-forecast"