Tax treaty lookup, withholding tax rates, double-taxation relief, residency tiebreaker rules, MLI modifications for any country pair. Worldwide guide returning treaty outcomes by t

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.

price-ascending: candidates are ordered by the listed price of the operation, with no managed-first preference applied. Unlike /v1/apis, this surface does not rank Apiosk-settled listings above federated ones — a comparison that reorders on commercial grounds is not a comparison. Pass sort=managed_first for the catalog's ordering.

Compared: listed price, settlement rail and input compatibility. Not measured yet: latency, reliability, result quality, and provider terms such as rate limits, jurisdiction and licensing.