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Authentication
timdev edited this page Jan 14, 2026
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Close API keys use HTTP Basic Authentication.
Default base URL:
https://api.close.com/api/v1
This is also the default for closecrm-node.
Per the Close docs, the API key acts as the username and the password is empty. That means the Basic Auth value is base64 of:
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YOUR_API_KEY:(note the trailing colon)
const Closecom = require('closecrm-node');
const api = new Closecom(process.env.CLOSE_API_KEY);
const me = await api.user.me();This library is primarily built around API keys. If you need to build a public app, refer to Close’s OAuth docs.
Reference: https://developer.close.com/topics/authentication/