N Nimbus CRM
API Reference Getting started

Authentication & errors

How to authenticate, paginate and handle errors.

Updated 14 Oct 2026, 17:29 api authentication

Base URL

All requests go to the base URL shown in the playground on each endpoint page.

Authentication

Send your API key as a bearer token:

Authorization: Bearer YOUR_API_KEY

Create keys under Settings → API keys. Keys have the same permissions as the user who created them.

Errors

Status Meaning
400 The request was invalid – see error.message
401 Missing or invalid API key
404 The resource doesn't exist
429 Rate limit hit – wait and retry
{ "error": { "code": "invalid_email", "message": "Email address is not valid" } }

Rate limits

100 requests per minute per key.