Merriam-Webster Developer Center

Frequently Asked Questions

How do I sign up for an API Key?

To sign up for an API Key, you must register for an account. Once registered, you will be sent a confirmation e-mail. After your e-mail is verified, you will have access to two API keys which you can use to start building your app.

How many API Keys am I allowed?

You are allowed immediate access to two API Keys after account registration. If you require three or more API Keys, you must contact us to request more.

Is there any cost involved in using the API(s)?

If your app is considered "commercial" - supported by advertising, or makes money selling a product - you will be required to pay Merriam-Webster a licensing fee to use our API with your application. If your application is considered "non-commercial", you are free to use the API. However, if your application uses more than 1,000 queries per day, you will be required to pay a licensing fee.

Please contact us if your application is considered commercial or if you application required more than 1,000 queries per day.

How many queries am I allowed?

You are allowed 1,000 queries per API Key per day. If your application requires access to more than 1,000 queries per day, you will be required to pay a licensing fee.

How do I make use of the audio pronunciation WAVs <sound> and illustration images <art> referenced in the XML data returned by the API?

Follow the links below for more information about our audio and image APIs: