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Google Routes Tool

The Google Routes Tool allows your agent to utilize the Google Routes API in order to find a route between two or more destinations. You can get a route by walk, transit, car, motorcycle and bicycle.

Setup​

You will need to get an API key from Google here and enable the Routes API. Then, set your API key as process.env.GOOGLE_ROUTES_API_KEY or pass it in as an apiKey constructor argument.

Usage​

npm install @langchain/openai @langchain/community
import { GoogleRoutesAPI } from "@langchain/community/tools/google_routes";
import { ChatPromptTemplate } from "@langchain/core/prompts";
import { ChatOpenAI } from "@langchain/openai";
import { AgentExecutor, createToolCallingAgent } from "langchain/agents";

export async function run() {
const tools = [new GoogleRoutesAPI()];

const llm = new ChatOpenAI({
model: "gpt-3.5-turbo-0125",
});

const prompt = ChatPromptTemplate.fromMessages([
["system", "You are a helpful assistant"],
["placeholder", "{chat_history}"],
["human", "{input}"],
["placeholder", "{agent_scratchpad}"],
]);

const agent = await createToolCallingAgent({
llm,
tools,
prompt,
});

const agentExecutor = new AgentExecutor({
agent,
tools,
});

const result = await agentExecutor.invoke({
input: "How to go from the Eiffel Tower to the Louvre Museum by transit?",
});

console.log(result);

/* {
input: 'How to go from the Eiffel Tower to the Louvre Museum by transit?',
output: 'To travel from the Eiffel Tower to the Louvre Museum by transit, here is the route information:\n' +
'\n' +
'- Departure: Eiffel Tower\n' +
'- Arrival: Louvre Museum\n' +
'- Distance: 4.1 km\n' +
'- Duration: 18 minutes\n' +
'- Transit Fare: €2.15\n' +
'\n' +
'Travel Instructions:\n' +
"1. Walk to Pont d'IΓ©na\n" +
'2. Take bus 72 towards Gare de Lyon - Maison de La RATP\n' +
'3. Walk to your destination\n' +
'\n' +
'Departure Time: 22:03\n' +
'Arrival Time: 22:15\n' +
'\n' +
'Please follow these instructions to reach the Louvre Museum from the Eiffel Tower.'
} */
}

API Reference:


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