Frequently asked questions

Frequently asked questions


How can I sign up for the API?

The Oxford Dictionaries API v2 has flexible plans to suit all types of application. You can register for a Prototype account for free or register for our Developer plan to access all data and functionality. Once registered you can get started using the data straight away with your unique App ID and App Key. If you want to explore the API before registering our live documentation offers a playground to try real requests and view the data. For the full features and capabilities of the API you will need to register here.

How can I log in?

You can log in to your account by clicking the 'sign in' option from the main menu. If you have not already created an account, please select a plan that suits you and create an account.

Where can I find information about the different plan options?

You can view our plans here. We offer flexible plans to suit all types of application, based on the functionality you require. Any application requesting the ability to cache data will need to get in touch to discuss an Enterprise plan.

How much does the API cost?

We offer flexible plans to suit all types of application, based on the functionality you require. Our developer plan is a pay-as-you-go model which means you only ever pay for what you use, and the more you use, the greater the discount on the cost of each request. You can see more information about our pricing here.

How much will I be charged and when?

Our pay-as-you-go model means you only ever pay for what you use, and the more you use, the greater the discount on the cost of each request.

Charges are calculated at the beginning of each calendar month for the month previous and charged to your payment card in Great British Pounds (GBP). If you change your Application Plan during the month you are still liable for any charges accrued in that month up to that date. In general, invoices for all paying customers are generated on the first day of the month. They are then issued a few days later, at which point you will be notified of the amount that is due, and then you will be charged another two days later.

How can I change my plan?

You can change your Application Plan at any time using the ‘Update my plan’ button on the Applications page in your account.

Are there any monthly limits?

If you have a Prototype account you are limited to 60 request per minute and 1,000 requests per month.
Developer plans have an allowance of 500 requests per minute and an unlimited monthly total. If this does not meet your requirements then please fill out our Enterprise form to get in touch and discuss your needs.

How can I start integrating this data into my project?

You can test out our live documentation. If you need some advice from those in the know, take a look at our forum, where you can get advice from the community.

How can I delete my account?

Please contact us and we will delete your account for you.


Who built the Oxford Dictionaries API?

The Oxford Dictionaries API was built by a team in Oxford Dictionaries which is a part of Oxford University Press. You can find out more about our API here, and more about Oxford Dictionaries here.

What can I do with the Oxford Dictionaries API?

The Oxford Dictionaries API offers an easy way to access powerful lexical data (words, definitions, translations, audio pronunciations, synonyms, antonyms, parts of speech, and more) to use in your apps and websites. Please read our Terms and Conditions before signing up. If you would like to discuss your use of the API then please complete the Enterprise form to contact us.

Which dictionary does the API data come from?

The Oxford Dictionaries API provides access to our current English dictionaries which are available on en.oxforddictionaries.com. This is our most comprehensive current English dictionary dataset and includes enhanced, updated versions of the Oxford Dictionary of English and the New Oxford American Dictionary. It includes more than 350,000 entries and is regularly updated with new words, senses, and definitions.
We also have content in Spanish, German, Portuguese, Romanian, isiZulu, Northern Sotho, Malay, Indonesian...and many more, and we're adding more all the time. Take a look at our supported languages page for the most up-to-date list.

Is this an Oxford English Dictionary API?

Oxford Dictionaries and the Oxford English Dictionary both come from the same publisher, Oxford University Press, but are different products. While Oxford Dictionaries reflects current usage of English, the OED records how language has developed over time. You can learn more about the difference between the OED and Oxford Dictionaries here.


Can I use the API in a commercial project?

Use of the Oxford Dictionaries API as a commercial product is permitted in line with our terms and conditions.

Can I use the Oxford branding in my application?

Please visit our branding resources page for the guidelines on using our branding and the appropriate logo.

Can I cache data?

Caching or any saving and use of the data offline is only permitted on a case by case basis - please complete our Enterprise form to request this functionality. Including estimates of how much data you would initially anticipate caching will expedite the consideration process.

Where can I find your terms and conditions?

Our terms and conditions can be found here.


Which languages do you support?

In the API, we currently offer content in English, Spanish, German, Portuguese, Romanian, isiZulu, Northern Sotho, Latvian, Malay, Indonesian...and many more, and we're adding more all the time. Take a look at our supported languages page for the most up-to-date list.
If you’re looking for a dictionary dataset for a language which isn’t currently available via the API, we might still be able to help. We have over 35 language datasets, from Afrikaans to Vietnamese, available to license via Oxford Dictionaries Licensing. We are also building content in 100 of the world's languages, many of which are digitally under-represented, as part of our Oxford Global Languages initiative.

I can't see the language I need. Will you include it in the API?

Please take a look at our supported languages page. If your requested language isn't available through our API, it may be available through our licensing programme. If licensing is not the right option for you, please do let us know, as the more a language is requested, the more likely it is that we will be able to prioritize it for inclusion in the future.

What does this error code mean?

If you explore our documentation page, you will find information on what each error code might mean under the 'response messages' for each endpoint. If you need any further help on resolving your problem, you may find our forum a useful resource for input from other developers using the API.


There are lots of handy how-tos on our forum. If the answer to your question isn't there, please feel free to start your own thread or contact us for assistance.