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Gmail Tool

The Gmail Tool allows your agent to create and view messages from a linked email account.

Setup​

You will need to get an API key from Google here and enable the new Gmail API. Then, set the environment variables for GMAIL_CLIENT_EMAIL, and either GMAIL_PRIVATE_KEY, or GMAIL_KEYFILE.

To use the Gmail Tool you need to install the following official peer dependency:

tip

See this section for general instructions on installing integration packages.

npm install @langchain/openai googleapis @langchain/community

Usage​

import { initializeAgentExecutorWithOptions } from "langchain/agents";
import { OpenAI } from "@langchain/openai";
import {
  GmailCreateDraft,
  GmailGetMessage,
  GmailGetThread,
  GmailSearch,
  GmailSendMessage,
} from "@langchain/community/tools/gmail";
import { StructuredTool } from "@langchain/core/tools";

export async function run() {
  const model = new OpenAI({
    temperature: 0,
    apiKey: process.env.OPENAI_API_KEY,
  });

  // These are the default parameters for the Gmail tools
  //   const gmailParams = {
  //     credentials: {
  //       clientEmail: process.env.GMAIL_CLIENT_EMAIL,
  //       privateKey: process.env.GMAIL_PRIVATE_KEY,
  //     },
  //     scopes: ["https://mail.google.com/"],
  //   };

  // For custom parameters, uncomment the code above, replace the values with your own, and pass it to the tools below
  const tools: StructuredTool[] = [
    new GmailCreateDraft(),
    new GmailGetMessage(),
    new GmailGetThread(),
    new GmailSearch(),
    new GmailSendMessage(),
  ];

  const gmailAgent = await initializeAgentExecutorWithOptions(tools, model, {
    agentType: "structured-chat-zero-shot-react-description",
    verbose: true,
  });

  const createInput = `Create a gmail draft for me to edit of a letter from the perspective of a sentient parrot who is looking to collaborate on some research with her estranged friend, a cat. Under no circumstances may you send the message, however.`;

  const createResult = await gmailAgent.invoke({ input: createInput });
  //   Create Result {
  //     output: 'I have created a draft email for you to edit. The draft Id is r5681294731961864018.'
  //   }
  console.log("Create Result", createResult);

  const viewInput = `Could you search in my drafts for the latest email?`;

  const viewResult = await gmailAgent.invoke({ input: viewInput });
  //   View Result {
  //     output: "The latest email in your drafts is from hopefulparrot@gmail.com with the subject 'Collaboration Opportunity'. The body of the email reads: 'Dear [Friend], I hope this letter finds you well. I am writing to you in the hopes of rekindling our friendship and to discuss the possibility of collaborating on some research together. I know that we have had our differences in the past, but I believe that we can put them aside and work together for the greater good. I look forward to hearing from you. Sincerely, [Parrot]'"
  //   }
  console.log("View Result", viewResult);
}

API Reference:

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