Created on 24th June 2025
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AI402 lets resource owners easily monetize their tools and lets users seamlessly pay for exactly what they need.
AI402 removes all the complexity of monetizing digital tools while making it effortless for users to access exactly what they need when they need it.
MCP Client SDK with Payment Proxy Integration - The official MCP Client SDK wasn't designed to work through payment proxies, so I created a custom Payment Enabled MCP Client that extends the official SDK to try normal calls first, then fall back to x402-axios for payments while preserving session headers. Discovered auth headers needed to be inside requestInit.headers rather than passed directly to transport constructors.
Multi-Layer Authentication Forwarding - Managing user-provided API keys, server-stored credentials, and MCP session headers all flowing through the same proxy required building intelligent header forwarding in proxyService.js that combines different auth types while maintaining security isolation and preserving MCP sessions through payment flows.
Bedrock + MCP Tool Orchestration - Creating an AI playground where Bedrock models analyze messages, decide when to use MCP tools, and generate responses required building multi-step orchestration using structured prompts to get JSON tool calls from Bedrock, execute tools via MCP SDK with payment handling, then feed results back to Bedrock for natural responses.
Tracks Applied (4)
Amazon Web Services
Technologies used
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