http4k Pro modules

http4k Pro modules provide enterprise-ready capabilities essential for teams building scalable, mission-critical applications. These commercially licensed extensions enable enhanced security, monitoring, and reliability features needed for high-volume transaction processing, sensitive data handling, and resilient microservice architectures in regulated environments.

With Pro modules, teams can confidently deploy http4k applications that meet strict compliance requirements while maintaining the performance demands of modern cloud workloads.

The library of Pro modules is regularly growing. Some modules are available for early access — fully tested and production-ready. Sign up for updates on their product pages or get in touch to talk to us about getting started.

Pro modules are available to license standalone or are automatically included as a part of the http4k Enterprise Edition. We also offer custom licensing terms to suit your organisation’s needs — get in touch using the button below.

X402 Payments
X402 Payments

HTTP 402-based payment protocol enabling machine-to-machine commerce with automatic micropayment negotiation

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Machine Payments Protocol
Machine Payments Protocol

Scalable machine-to-machine payment infrastructure for automated digital commerce between services

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Server Hot Reload
Server Hot Reload

Hot Reload automatically restarts your server after code changes, saving you time during development

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Verify
Verify

Automatic build-time verification of http4k artifact signatures, SBOMs, SLSA provenance, and license reports

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Model Context Protocol
Model Context Protocol

Build MCP servers and MCP Apps to integrate Large Language Models with your data and tools using familiar testable http4k patterns

Get Early Access
Agent2Agent
Agent2Agent

Build interoperable AI agent systems with Google's A2A protocol — Agent Cards, Tasks, Streaming, and Push Notifications using testable http4k patterns

Get Early Access
Wiretap
Wiretap

OpenTelemetry trace capture and HTML test reports with Wiretap Intercept, plus real-time traffic monitoring, chaos engineering, and MCP debugging with Wiretap Console

Get Early Access
Transactional Outbox
Transactional Outbox

A robust transactional outbox implementation for http4k that ensures reliable message delivery with database consistency.

Coming soon...
BackOffice
BackOffice

Secure & audited API Gateway for developers and MCP tools to connect to your OpenAPI-powered services

Coming soon...

Need bulk developer seats, team licensing, or custom terms?

Get in touch and we'll find the right fit — whether that's volume licensing for individual Pro modules or our full Enterprise Edition with LTS support and priority access to all Pro modules.

Frequently Asked Questions

  • How are http4k Pro modules different from the http4k Community modules?

    Pro modules are commercially licensed extensions developed specifically to solve common enterprise use cases. They are distributed under org.http4k.pro Maven coordinate group. You can find details of the http4k Commercial License here.

  • Does this mean the Pro modules are more reliable than http4k Community?

    No. All http4k modules share the same high quality standards and testing rigor. Pro modules provide additional enterprise-focused features rather than enhanced reliability.

  • How are the modules licensed?

    Pro modules are licensed annually per floating developer seat for both development and production use, meaning multiple developers can use the modules but only one developer per seat at a time. Licenses include access to Maven artifacts via Maven Central and technical support via GitHub issues.

  • My organisation wishes to use several of the http4k Pro modules. Can we buy a bundle of licenses?

    Yes. We offer volume discounts for organisations that wish to purchase multiple Pro modules. Please contact us using the button below.

  • Can I use Pro modules for free?

    We are completely supportive of experimentation with http4k technologies, so Pro modules are free for personal use, non-profit organizations, non-commercial research, and qualifying small businesses. See our commercial license for exact terms.

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