Http4k Pro on http4k

http4k Pro

Mon, 01 Jan 0001 00:00:00 +0000

http4k Pro is a set of commercially-licensed modules that extend http4k with production-grade capabilities - enhanced security, observability, AI tooling and developer productivity - for teams running http4k in regulated, high-volume environments.

A2A SDK

Mon, 01 Jan 0001 00:00:00 +0000

Installation (Gradle)#

dependencies {
 
 implementation(platform("org.http4k:http4k-bom:6.54.0.0"))


 // for A2A server development
 implementation("org.http4k.pro:http4k-ai-a2a-sdk")

 // for connecting to A2A agents
 implementation("org.http4k.pro:http4k-ai-a2a-client")

 // for exposing an A2A agent to MCP clients (the MCP bridge)
 implementation("org.http4k.pro:http4k-ai-mcp-a2a-bridge")
}

About#

The Agent2Agent (A2A) Protocol is an open standard designed to facilitate communication and interoperability between independent AI agent systems. In an ecosystem where agents might be built using different frameworks, languages, or by different vendors, A2A provides a common language and interaction model.

Machine Payments Protocol

Mon, 01 Jan 0001 00:00:00 +0000

dependencies {
 
 implementation(platform("org.http4k:http4k-bom:6.54.0.0"))

 implementation("org.http4k.pro:http4k-connect-mpp")
}

http4k Connect provides support for the Machine Payments Protocol (MPP), enabling HTTP 402 Payment Required flows for APIs. MPP supports multiple payment methods (Stripe, crypto, etc.) and provides a protocol-level standard for machine-to-machine payments.

MCP SDK

Mon, 01 Jan 0001 00:00:00 +0000

Installation (Gradle)#

dependencies {
 
 implementation(platform("org.http4k:http4k-bom:6.54.0.0"))


 // for general MCP server development
 implementation("org.http4k.pro:http4k-ai-mcp-sdk")

 // if you want to connect to an MCP server
 implementation("org.http4k.pro:http4k-ai-mcp-client")

 // if you want to test MCP servers or MCP Apps
 implementation("org.http4k.pro:http4k-ai-mcp-testing")

 // for x402 payment-protected MCP tools
 implementation("org.http4k.pro:http4k-ai-mcp-x402")

 // for MPP payment-protected MCP tools
 implementation("org.http4k.pro:http4k-ai-mcp-mpp")

 // for exposing an A2A agent as MCP tools (the A2A bridge)
 implementation("org.http4k.pro:http4k-ai-mcp-a2a-bridge")
}

Try it out!#

Want to see http4k MCP in action? Visit the http4k Toolbox where you can download and install a fully working MCP app that integrates directly with Claude Desktop and other MCP clients.

Security: WebAuthn

Mon, 01 Jan 0001 00:00:00 +0000

Installation (Gradle)#

dependencies {
 
 implementation(platform("org.http4k:http4k-bom:6.54.0.0"))

 implementation("org.http4k:http4k-security-webauthn")
}

About#

Passwordless authentication using WebAuthn/FIDO2 passkeys. The module handles the full registration and authentication ceremonies, session management, and cryptographic verification of credentials, so users can sign in with a fingerprint, face, security key, or device PIN instead of a password.

Tools: Hot Reload

Mon, 01 Jan 0001 00:00:00 +0000

Installation (Gradle)#

dependencies {
 
 implementation(platform("org.http4k:http4k-bom:6.54.0.0"))

 implementation("org.http4k.pro:http4k-tools-hotreload")
}

About#

The http4k-tools-hotreload module provides a simple mechanism to dynamically reload the application when the source code changes. This is extremely useful for web development when used in combination with a templating system such as Handlebars, as it allows you to see live changes in both the application logic and the templates without having to restart the application.

Wiretap

Mon, 01 Jan 0001 00:00:00 +0000

What is Wiretap?#

When something goes wrong in a distributed system, the hardest part is understanding what actually happened. Which services were called? What did the requests and responses look like? Where did the time go? Where did the error originate?

X402

Mon, 01 Jan 0001 00:00:00 +0000

dependencies {
 
 implementation(platform("org.http4k:http4k-bom:6.54.0.0"))

 implementation("org.http4k.pro:http4k-connect-x402")
 implementation("org.http4k.pro:http4k-connect-x402-fake")
}

http4k Connect provides support for the x402 protocol, enabling HTTP 402 Payment Required flows for APIs. The module includes both client and server-side components for integrating cryptocurrency-based payments into your http4k applications.