We welcome your feedback on our customer service form. Please use "UMLS REST API feedback" in your subject line.
Check out the Postman sample collection to help you get started using the UMLS REST API.
The UMLS REST API requires a UMLS account for the authentication described below. If you do not have a UMLS account, you may apply for a license on the UMLS Terminology Services (UTS) website.
For example, https://uts-ws.nlm.nih.gov/rest/content/current/CUI/C0009044?apiKey={{YOUR_API_KEY}}
We also offer an endpoint for validating API keys. If you have developed an application that integrates UMLS data and you need to determine whether a user is a UMLS licensee, you can use this endpoint to validate the user’s API key.
Make a request that includes both your API key (validatorApiKey) and the API key of the user of your application (apiKey). For example:
https://utslogin.nlm.nih.gov/validateUser?validatorApiKey=YOUR_API_KEY&apiKey=USER_API_KEY
Note: AccessGUDID users can now use the API Key authentication method. For AccessGUDID users that have previously implemented Ticket-Granting Tickets and Service Tickets for authentication, please refer to this documentation: