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Flexmail API Authentication

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

Every Flexmail API request through MindCloud needs two things: a MindCloud API Key and a connectionId for your Flexmail 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

  1. Create a MindCloud account at app.mindcloud.co if you do not already have one.
  2. Generate a MindCloud API Key in API Keys. This is the Bearer token you send on every request. Keep it on your server.
  3. Create a Flexmail connection in Connections. Flexmail uses a username and password. You enter them when you create the connection — MindCloud stores them securely so your requests never carry raw credentials.
  4. 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 Flexmail account that should run the action. MindCloud stores and refreshes the Flexmail 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 List Contacts with an Flexmail connection looks like this:

curl --request POST \
  --url "https://connect.mindcloud.co/v2/universal/apps/flexmail/actions/list-contacts/run" \
  --header "Authorization: Bearer $MINDCLOUD_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
  "connectionId": "$CONNECTION_ID",
  "arguments": {}
}'

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

Connect Flexmail

You need a Flexmail account with access to the marketing REST API. This connection uses your Flexmail account ID as the username and a personal access token as the password.

  1. Sign in to Flexmail

    Open the Flexmail application and sign in with the account you want to connect.

    Flexmail application → Sign in
  2. Open your API token settings

    In Flexmail, go to Settings > API > Personal access tokens.

  3. Create or copy a personal access token

    Create a new personal access token if needed, or copy an existing token you want to use for this connection.

  4. Enter your Flexmail credentials in MindCloud

    In the MindCloud connection form, enter your Flexmail account ID as the username and the personal access token as the password.

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.