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handel.halowerk.com v1 parcel-normalize
https://handel.halowerk.com/v1/parcel-normalize
answers 402
Does two things that every shipping integration rebuilds and every one of them differently. First, carrier detection: the number is matched against the known formats and, where the format carries one, the check digit is actually computed — the UPS 1Z digit, the Universal Postal Union S10 digit and the GS1 mod-10 digit. This matters because pattern alone does not separate the formats: twelve digits
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.002
- Network
- base
- Pay to
- 0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 671 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:23:41.366Z (21d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fhandel.halowerk.com%2Fv1%2Fparcel-normalize"