Open Source Metering and Usage Based Billing API ⭐️ Consumption tracking, Subscription management, Pricing iterations, Payment orchestration & Revenue analytics

Introduce technologies on blockchain and distributed ledger, from theory to practice with bitcoin, ethereum and hyperledger.

Metering and Billing for AI, API and DevOps. Collect and aggregate millions of usage events in real-time and enable usage-based billing.

The Go FIX Protocol Library 🚀

ACH implements a reader, writer, and validator for Automated Clearing House (ACH) files. The HTTP server is available in a Docker image and the Go package is available.

Blnk is an open-source ledger & financial core for shipping fintech products fast.

Source-available, cloud-native ledger platform for building financial infrastructure — multi-currency, multi-asset, double-entry accounting with n:n transaction support.

[ARCHIVE] Crypto payment gateway. Accept the most popular crypto globally with a complete solution.

开源的golang量化工具集合

Go library containing a collection of financial functions for time value of money (annuities), cash flow, interest rate conversions, bonds and depreciation calculations.

Numscript is a Domain-Specific Language (DSL) designed to help you model complex financial transactions, replacing complex and error-prone custom code with easy-to-read, declarative scripts.

FedWire funds service file parser and writer. The HTTP server is available in a Docker image and the Go package is available.

Payment gateway enabling automated ACH operations in a distributed and fault tolerant way.

Go implementation of Centrifuge POD (Private Off-chain Data) node

A hedge fund on your local machine. Terminal-native algo trading engine in Go with local LLM inference (Ollama), Bubble Tea TUI, paper/live trading, and zero cloud dependency. BYOB.

accounts - General Ledger and financial account service with an HTTP API

Simple Golang FIX API library

Double-Entry Bank Ledger in Go is a production-focused backend that demonstrates how to correctly handle money movements using strict double-entry accounting with PostgreSQL, Atomic transactions, concurrency-safe operations (serializable isolation + automatic retries), row-level locking, and full ledger reconciliation patterns used by fintech syste

core libraries used in Moov projects

Golang client for personal and corporate Monobank API.