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 — check back often for new additions.
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.
Model Context Protocol
Build MCP servers and MCP Apps to integrate Large Language Models with your data and tools using familiar testable http4k patterns
X402 Payments
HTTP 402-based payment protocol enabling machine-to-machine commerce with automatic micropayment negotiation
Machine Payments Protocol
Scalable machine-to-machine payment infrastructure for automated digital commerce between services
Server Hot Reload
Hot Reload automatically restarts your server after code changes, saving you time during development
Wiretap
HTTP and MCP traffic inspection and debugging tool for monitoring, recording, and replaying requests in your http4k applications
Transactional Outbox
A robust transactional outbox implementation for http4k that ensures reliable message delivery with database consistency.
Agent2Agent
Build interoperable AI agent systems with Google's A2A protocol — Agent Cards, Tasks, Streaming, and Push Notifications using testable http4k patterns
BackOffice
Secure & audited API Gateway for developers and MCP tools to connect to your OpenAPI-powered services
