Close API Authentication

How to authenticate Close API requests: one Bearer API key plus a connectionId. MindCloud stores your Close credentials — no auth headers to build.

Every Close API request through MindCloud needs two things: a MindCloud API Key and a connectionId for your Close account. This page covers both, plus exactly how to send them, so you do not need to visit any other page to get authenticated.

Steps to authenticate

Create a MindCloud account at app.mindcloud.co if you do not already have one.
Generate a MindCloud API Key in API Keys. This is the Bearer token you send on every request. Keep it on your server.
Create a Close connection in Connections. Close uses a username and password. You enter them when you create the connection — MindCloud stores them securely so your requests never carry raw credentials.
Copy the connection’s connectionId — you will send it on every request alongside your MindCloud API Key.

How requests are authenticated

Authentication has two layers. Your MindCloud API Key authenticates the request to MindCloud, sent as a Bearer token in the Authorization header. The connectionId selects the connected Close account that should run the action. MindCloud stores and refreshes the Close credentials behind that connection, so you never send provider tokens with your requests.

Pass connectionId in the query string for GET and DELETE actions, and in the JSON body for POST, PUT, and PATCH actions.

For example, calling Get Current User with an Close connection looks like this:

curl --request GET \
  --url "https://connect.mindcloud.co/v1/universal/close/latest/actions/get-current-user" \
  --header "Authorization: Bearer $MINDCLOUD_API_KEY" \
  --get \
  --data-urlencode "connectionId=$CONNECTION_ID"

The Authorization: Bearer <your MindCloud API Key> header authenticates you to MindCloud; the connectionId tells MindCloud which Close account to run the action against. Missing or invalid Authorization returns 401, and a missing or mismatched connectionId returns 400.

How to connect Close

Have your Close API key ready. Close API keys use HTTP Basic auth with the key as the username and a blank password.

Copy an API key from Close
In Close, open Settings and copy the API key you want MindCloud to use.
Paste the API key into the username field
When you create the MindCloud connection, paste the Close API key into the username field.
Leave the password blank
Close expects an empty password for API-key Basic authentication.

Keep your key safe

Keep your MindCloud API Key on your server; do not ship it in browser code, mobile apps, public repositories, or logs. Anyone with the key can call the Universal API as your MindCloud account, across every connection you have created.