Spell Check API

Frequently Asked Questions

• Can I use the Spell Check API for commercial purposes?

  Yes, but you must have a premium subscription. Commercial use of the Spell Check API is not permitted on the free tier. See our pricing page to choose a plan that fits your needs.

• How do I get an API key and start using the Spell Check API?

  Sign up for a free account to instantly get your API key, then pass it in the X-Api-Key header on every request. The documentation above includes ready-to-run examples in cURL, Python, JavaScript, Node.js, and more.

• What happens if I exceed my quota for the month?

  Your API requests will simply be denied once you hit your monthly quota — you will never be charged more than the plan you signed up for. To increase your quota, you can upgrade your plan any time on our pricing page.

• What happens if a request to the Spell Check API fails?

  The API responds with a standard HTTP status code and a JSON error message describing the problem. See our error codes reference for the full list of codes and how to resolve each one, or contact support if you need help.

• What are some use cases for the Spell Check API?

  It is useful for validating and auto-correcting user input in forms, search boxes, and chat applications, as well as cleaning up text before further processing. It pairs well with the Text Language API for detecting language and the Profanity Filter API for moderating content.

• How long can the text I check be?

  The single required text parameter accepts up to 50 characters on the free tier and up to 500 characters for premium subscribers, so longer content must be split into chunks; you can upgrade on the pricing page.

• What does the Spell Check API response include?

  The response returns the original input text, the fully corrected text, and a corrections array. Each item in corrections includes the misspelled word, its index in the text, the chosen correction, and a candidates array of possible alternatives; see the error codes page for unsuccessful requests.

• How can I get all the alternative spelling suggestions for a misspelled word?

  For each entry in the corrections array, the candidates field provides an array of possible corrections for that word, while correction gives the single best suggestion. To then look up the meaning of a corrected word, you can use the Dictionary API.