Medical Spell Checker API

A free-to-use medical spell checker for your web applications

Try it — test the API using common misspellings found in the medical sector.

Introduction

Originally developed to spell-check clinical care plans, the medical spell-checking API allows clinicians to correct common misspellings before publishing their Discharge Summary Documents. The API offers a free-to-use medical spell checker, hosted on our AWS serverless infrastructure, so it can scale to meet your requirements.

Based on hunspell, the platform adds 90,142 medical and drug terminology to an already comprehensive dictionary of English words. Clinical systems will be able to pass text to the Medical Spell Checker API and get a list of misspellings returned as JSON, along with a list of suggested replacements.

Try it out now, or read the implementation documentation.

Frequently Asked Questions

• Is any data sent to the API logged? – No, our serverless compute infrastructure contains no attached disks. We have no mechanism to log any data. For example, we don’t even use Cloud Watch Logs. If your’re worried about this and would like to host the software within your own AWS account then please contact us asking for details.
• Can we suggest corrections? – If you find an issue with a particular word that is incorrectly being detected as a misspelling, or would like to add a new word, then please email our librarian and they will update the dictionaries.
• Which region is the API hosted? – It’s currently hosted in eu-west-2 (London), if you need to host it in a different region, for regulatory purposes, then please contact us for details.
• Can you help us integrate with product X? – Probably, with over thirty five years development experience, we can probably help, reach out for an initial discussion.

Future Plans

• Support HTML fragments being sent to the API, so that tags are ignored.
• We’re looking at incorporating a name database into the dictionaries so that patient and staff names aren’t flagged as misspellings.

Version History

• 1.04 [15.05.2026] – Add original word to drop down selection list
• 1.03 [14.05.2026] – Added option to ignore suggestions in drop down selection list.
• 1.03 [14.05.2026] – Created a reference implementation project.
• 1.02 [09.05.2026] – Fixed issue with word boundaries and updated dictionary.
• 1.01 [04.04.2026] – Initial release.

Technology Stack

Written in Microsoft’s C# 14 programming language (.NET 10) & hosted on AWS