the402 endpoint detail

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taxpulse.theaslangroupllc.com tax treaty

https://taxpulse.theaslangroupllc.com/api/tax/treaty

answers 402, partial

Tax treaty lookup, withholding tax rates, double-taxation relief, residency tiebreaker rules, MLI modifications for any country pair. Worldwide guide returning treaty outcomes by transaction type. Tax intelligence, not advice.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse. It advertises 14 ways to pay and only 13 of them are usable.
Price
$0.12
Network
base
Pay to
0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
151 ms
Payment options
13 usable of 14
Last checked
2026-08-15T14:33:08.152Z (5d ago)
Category
search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Ftaxpulse.theaslangroupllc.com%2Fapi%2Ftax%2Ftreaty"