The local-first, open-source payment engine for stablecoins

Think of it as Stripe, but for stablecoins — declarative, self-hosted, and yield-bearing.

---

Build, test, and deploy stablecoin payments right from your laptop. Define invoices, subscriptions, and pay-per-API billing as declarative YAML — then deploy anywhere. Open-source, portable, and x402-ready.

Key Features

• Local-first sandbox — Spin up your entire payment stack locally (products, prices, billing rules, test accounts) without touching external APIs. Billing is code.
• Native x402 support — Test, iterate, and deploy x402 payment-gated API endpoints in minutes with an auto-provisioned local sandbox.
• MCP embedded, agent-ready — Built-in MCP runtime connects AI agents directly to your payment stack for autonomous payment strategy design and testing.
• Embedded yield (coming soon) — Idle stablecoin liquidity is automatically routed to yield strategies. Your cashflow earns by default.
• Stripe-compatible import — Import existing products, prices, and plans from Stripe. Migrate incrementally.

MoneyMQ in action

Installation

Homebrew (macOS)

brew install txtx/taps/moneymq

From source

git clone https://github.com/txtx/moneymq.git && cd moneymq
cargo moneymq-install

Docker

docker run moneymq/moneymq --version

Verify: moneymq --version

Getting Started

# Start a local payment sandbox
moneymq sandbox

From there, you can:

• Define products, prices, and plans locally (or import from Stripe)
• Simulate checkout sessions and API metering
• Test x402-gated endpoints before going live

Architecture

MoneyMQ is a Rust workspace organized into focused crates:

Crate	Description
crates/cli	Command-line interface
crates/core	Core payment logic and API endpoints
crates/mcp	Embedded MCP server runtime
crates/sdk	SDK for integrations
crates/stream	Event streaming
crates/studio	Studio UI
crates/types	Shared type definitions
crates/drivers/stripe	Stripe driver
crates/drivers/kit	Driver toolkit

Examples: examples/surfpool · examples/x402 · examples/agent-buyer · examples/agent-seller

Community

• Discord — Join the conversation
• X / Twitter — Release updates
• Issues — Help wanted

Contributing

We welcome contributions of all kinds. Here's how to get started:

1. Check out issues labeled good first issue or help wanted
2. Fork the repo, create a branch, and open a pull request
3. Join Discord for questions and discussion

Please read our Code of Conduct before contributing.

Security

MoneyMQ handles payment logic — security is a first-class concern.

If you discover a security vulnerability, please report it responsibly via security@txtx.io. Do not open a public issue for security vulnerabilities.

License

MoneyMQ is licensed under the Apache License 2.0.