Financial Data API

JavaScript & TypeScript SDK for Financial Data

Full TypeScript types, ESM/CJS, WebSocket streaming. The Node.js market data library for modern apps.

npm install eulerpool

Quick start

Three steps to your first data call

1. Install

$ npm install eulerpool

2. Authenticate

import Eulerpool from "eulerpool";

const client = new Eulerpool("ep_live_xxx");

3. Fetch data

const profile = await client.equity.profile("AAPL");
const financials = await client.equity.financials("AAPL");

console.log(`${profile.name}: P/E ${financials.peRatio}`);

Features

Built for JavaScript & TypeScript

Full TypeScript types

Autocomplete and type safety. Every response is fully typed.

ESM & CJS

Works with Node.js, Deno, and bundlers. Import how you want.

Async/await native

Promise-based API. No callbacks. Modern JavaScript.

WebSocket & tree-shakeable

Real-time streaming. Import only what you use. Small bundles.

Example

Portfolio tracker

portfolio.js

import Eulerpool from "eulerpool";

const client = new Eulerpool("ep_live_xxx");

async function getPortfolioValue(holdings) {
  const tickers = holdings.map(h => h.ticker);
  const quotes = await client.equity.quotes(tickers);

  return holdings.reduce((total, h) => {
    const price = quotes[h.ticker].price;
    return total + h.shares * price;
  }, 0);
}

Ready to build?

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