Basically, there are no obvious restrictions - rather, "must have" criteria for that.
The Upwork API Key cannot be connected if the mentioned criteria are not met:
Your Upwork profile must have:
A valid name (no fake names, no company names)
A valid address (including apartment number) - either in your personal or your company’s profile
A valid profile picture
An active and verified payment method
Please provide a short description of what you are planning on using our APIs for (this info is required when you apply for a key). Please specify whether you are planning on exposing your application to third parties or you are planning on using it only for personal purposes.
Please agree to use the Upwork API in a manner that does not exceed a reasonable request volume. Our daily allowed limit is 40K requests.
Please refrain from using the Upwork logo, brand name, brand theme/colors and trademarked content in your application
Your account must not be suspended and you have passed ID verification
You must indicate if you are a client, the company/agency owner, or a developer requesting on behalf of the client, and API key’s purpose: pre-production or production.
If you are a third-party requesting on behalf of another user, provide the client’s email address.
✅ If you have met these criteria, you can request an API key using the following link: