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123FormBuild API Authentication

How to authenticate 123FormBuild API requests: one Bearer API key plus a connectionId. MindCloud stores your API key securely — set it once, never resend it.

Every 123FormBuild API request through MindCloud needs two things: a MindCloud API Key and a connectionId for your 123FormBuild 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 123FormBuild connection in Connections. 123FormBuild uses an API key. You generate the key in your 123FormBuild account, then paste it in when you create the connection — MindCloud stores it securely and never returns it in a response.
  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 123FormBuild account that should run the action. MindCloud stores and refreshes the 123FormBuild 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 Forms with an 123FormBuild connection looks like this:

curl --request POST \
  --url "https://connect.mindcloud.co/v2/universal/apps/formBuild/actions/list-forms/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 123FormBuild account to run the action against. Missing or invalid Authorization returns 401, and a missing or mismatched connectionId returns 400.

Get a 123FormBuilder JWT token

You need a 123FormBuilder account and either your username or email plus your password. If your account was created on the EU site, tell your MindCloud team before testing because the API uses a different base URL.

  1. Open the official Authentication docs

    Use the 123FormBuilder API v2 Authentication page. It documents the login, refresh, and invalidate token operations.

    Developer Center → Authentication
  2. Generate a token with the User login operation

    On that page, use the login endpoint to send your username or email and your password. The docs say you can also use passhash instead of a plain password if your account uses that flow.

  3. Paste the token into the MindCloud connection

    Copy the returned token and paste it into the MindCloud connection field labeled API Key for this app.

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.