Open source Fintech infrastructure

The plumbing behind your fintech product.

Open data models and hosted services for securities, transactions, positions and portfolios. We handle scale, security and plumbing. You spend your time on the idea that sets you apart.

Browse public data free, no sign-up. Get a free API key to use it in your code.

TypeScriptPythonJavaRust
first-call.ts

$ npm i @fintekkers/ledger-models

import { PortfolioService } from "@fintekkers/ledger-models/node/wrappers/services/portfolio-service/PortfolioService";
import { PositionFilter } from "@fintekkers/ledger-models/node/wrappers/models/position/positionfilter";
import { ZonedDateTime } from "@fintekkers/ledger-models/node/wrappers/models/utils/datetime";
import pkg from "@fintekkers/ledger-models/node/fintekkers/models/position/field_pb.js";
const { FieldProto } = pkg;

// Run with your free API key (Pro register/login) as the first argument.
const apiKey = process.argv[2];
const portfolios = new PortfolioService(apiKey);

const results = await portfolios.searchPortfolio(
  ZonedDateTime.now().toProto(),
  new PositionFilter().addEqualsFilter(
    FieldProto.PORTFOLIO_NAME,
    "Federal Reserve SOMA Holdings"
  )
);

console.log(results[0].getPortfolioName());
Federal Reserve SOMA Holdings

One set of open models, with client libraries in

  • TypeScript
  • Python
  • Java
  • Rust

Why Fintekkers

Infrastructure you'd build yourself, if you had a year to spare.

Fast

Binary data streams instead of XML and JSON documents. Smaller payloads, faster parsing, and room to scale globally.

Open

Built on open-source models you can read, fork and extend. Start writing your application instead of reading reams of API docs. See the code

Flexible

Use the services you need, nothing more. Start by browsing public data for free, and register when you need the API, security and scale.

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Get started

From install to first query in minutes.

  1. 01

    Install a client

    Add the ledger-models package for TypeScript, Python, Java or Rust.

  2. 02

    Query public data

    Explore public data in the free data explorer, then call the same API with your free key.

  3. 03

    Register when you scale

    Get an API key for your own data, security controls and production throughput.

Talk to the engineers who built it.

Free, dedicated US-based support, from your first API call through production.