Authenticating External Services for LangChain in JavaScript

An example JavaScript app demonstrating how to integrate Pangea's Vault service into a LangChain app to authenticate with external services.

Prerequisites

• Node.js v22.
• A Pangea account with Vault enabled.
• An OpenAI API key.
• A Google Drive folder containing documents. Note down the ID of the folder (see the LangChain docs for a guide on how to get the ID from the URL).
• A Google Cloud project with the Google Drive API enabled.
• A Google service account with the "https://www.googleapis.com/auth/drive.readonly" scope.

The Google service account's credentials will also need to be added to Vault. This would look like:

Save the ID of the new Vault item for later.

Setup

git clone https://github.com/pangeacyber/langchain-js-service-authn.git
cd langchain-js-service-authn
npm install
cp .env.example .env

Fill in the values in .env and then the app can be run like so:

Let's assume we have a Google Drive document listing out the offices of some fictional company. We can ask a question like:

npm run demo -- --googleDriveFolderId "1Kj77..." --vaultItemId "pvi_..." "What are ABC Corporation's office locations?"

And a sample reply would be:

1. Headquarters - 1000 Tech Park Drive, Silicon Valley, CA 95054, United States
2. European Office - 20 Innovation Street, Tech City, London, EC1V 9AP, United Kingdom
3. Asia-Pacific Office - 500 Business Boulevard, Marina Bay, Singapore, 018989
4. East Coast Office - 250 Business Central, 5th Avenue, New York, NY 10001, United States.