Merriam-Webster has been producing language informationâ€”including dictionaries, thesauri, and translation materialsâ€”for over 150 years. The Merriam-Webster collection of APIs provide developer access to a variety of the companyâ€™s most prominent reference works. Free access is provided to non-commercial websites and applications. Free access is limited to two reference works with a maximum of 1000 queries a day per reference work. Full access is available for commercial use.