Which cryptocurrencies does JamsrPay support?

JamsrPay supports all major cryptocurrencies including USDT (TRON, BNB Chain, Ethereum, Solana, Polygon), USDC, Bitcoin (BTC), Ethereum (ETH), Solana (SOL), TRON (TRX), BNB, Litecoin, and more.

How do I integrate JamsrPay into my application?

You can integrate using our REST APIs, SDKs (TypeScript, Python, Go, Rust, PHP), and pre-built hosted checkout. A developer staging sandbox is available with instant test API keys.

Do you custody customer or merchant funds?

No. JamsrPay is non-custodial. We never hold your private keys or touch your balance sheet. Payments route directly from customer wallets to your designated merchant wallet address.

How does settlement work?

Once confirmed on-chain, JamsrPay instantly detects the transaction, cryptographically signs and broadcasts a webhook notification, and your funds settle directly to your self-custody wallet in real-time.

What are the processing fees?

Transaction fees start from just 0.4% + $0.25 with a 30-day free trial, 0% chargebacks, and zero monthly subscription fees. Volume rates scale down automatically to 0.25%.

Official Libraries & Tools

Official Developer SDKs & Client Libraries

Type-safe, open-source client libraries to integrate non-custodial crypto payments in minutes across your favorite language or runtime.

View GitHub Repos Read API Reference

Supported Languages & Frameworks

Production-ready packages tested against live crypto mainnets.

6 Official Clients

NPM Packagev2.5.0

TypeScript / Node.js

Fully typed server-side SDK for Node.js, Next.js, Express, and Bun with built-in webhook validation helpers.

npm install @jamsrpay/sdk

View Repository

Pip Packagev2.1.0

Python (PyPI)

Modern Python library with sync and asyncio support for FastAPI, Django, and Flask web frameworks.

pip install jamsrpay

View Repository

Go Modulev1.6.0

Go (Golang)

High-concurrency idiomatic Go client with automatic exponential retries and context cancellation.

go get github.com/jamsrpay/jamsrpay-go

View Repository

Composer Packagev2.2.0

PHP / Laravel

Composer package with native Laravel service providers and support for legacy PHP applications.

composer require jamsrpay/jamsrpay-php

View Repository

Cargo Cratev1.1.0

Rust (Cargo)

Asynchronous Tokio-based Rust crate with zero-allocation JSON parsing and strict memory safety guarantees.

cargo add jamsrpay

View Repository

Mobile SDKv1.4.0

React Native / Expo

Mobile checkout sheet with dynamic QR code rendering and deep-linking into Phantom, MetaMask, and Trust.

npm install @jamsrpay/react-native

View Repository

Engineered for Speed, Reliability & Security

All official SDKs share unified reliability guarantees across every runtime.

HMAC Signature Verification

Built-in cryptographic helpers to verify incoming webhook signatures with HMAC SHA-256 in a single function call.

Automated Retries & Backoff

Intelligent exponential retry strategies for transient network blips and HTTP 429 rate-limiting status codes.

100% Strict Type Definitions

Complete TypeScript types, Python type hints, and Go structs for instant autocomplete and compile-time validation.

SDK FAQs

Frequently asked questions about developer libraries.

Developer SDKs

Yes! All JamsrPay SDKs and client libraries are open-source under the MIT license on GitHub.

Have more questions? Our support engineers are online 24/7.View Full Knowledge Base

Ready to start integrating JamsrPay?

Read our full technical API reference or generate sandbox API keys.

Explore Documentation