1Forge
Forex currency market data
Currency Exchange · API key · HTTPS
Currency Exchange APIs · Page 2
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Ordered by reported HTTPS, CORS support, no-auth access, then changed/observed facts. Access signals are not a popularity or quality score.
Amdoren
Free currency API with over 150 currencies
Currency Exchange · API key · HTTPS
Currencylayer
Exchange rates and currency conversion
Currency Exchange · API key · HTTPS
TaxID
EU VAT number validation with company name and address lookup across all 27 member states
Currency Exchange · API key · HTTPS
Fixer
Exchange rates and currency conversion
Currency Exchange · API key · HTTPS not confirmed