Engineering.
Thoughts, architectures, and deep dives into building industrial-grade payment rails at the edge.
Machines That Pay: Implementing Google's A2A Protocol on a Live Financial Rail
The internet's payment layer was built for humans. We rebuilt it for agents, dissecting Google's A2A spec, verifiable credentials, and the cryptographic mandate pattern that makes autonomous commerce safe.
186 Tests, Zero Flakes: How We Test a Financial API Without a Test Database
Our strategy for achieving 100% test coverage with zero database dependencies and non-mocked cryptographic boundaries.
Engineering PayArk: Building High-Integrity Payment Rails at the Edge
How we built the high-integrity payment rails for Nepal using Cloudflare Workers, Effect-TS, and zero-trust principles.
Designing APIs for AI Agents First: What the Model Context Protocol Taught Us
What the Model Context Protocol (MCP) taught us about building APIs that AI agents can actually use without hallucinating.
The Autonomous Economy: How PayArk Becomes the Settlement Rail for Agent-to-Agent Commerce
Defining the settlement layer for the Machine-to-Machine (M2M) economy using PayArk, A2A, and AP2.