The Implementation Layer
Code-first guides for building real agentic payment flows. Working implementations, not theory — from x402 endpoint protection to agent wallet provisioning to audit-ready reconciliation.
x402 on AWS: CloudFront, Lambda@Edge and Bedrock AgentCore
A production walkthrough of the AWS reference architecture — WAF price injection, Lambda@Edge payment gates, on-chain settlement via x402 Facilitator, and managed agent wallets with AgentCore Payments. Includes working Lambda code.
Implementing x402 micropayments in a Python service
A complete code walkthrough for protecting any endpoint behind an x402 paywall — server setup, 402 response headers, client-side payment handling, and settlement verification. Uses the Bankee SDK and Coinbase Base network.
Giving an AI agent a Stripe-managed wallet
How to provision a Stripe Issuing virtual card scoped to an agent, set programmatic spend limits, attach it to an agent runtime, and reconcile transactions back to the originating agent session.
Building a spending-limit guardrail for autonomous agents
The engineering problem of constraining agent spend in real time — per-session limits, per-category limits, cooldown windows, and how to enforce these without adding latency to the payment path.
Agent authentication for payment APIs
API keys alone are not a sufficient auth model when the caller is an autonomous agent. This post covers scoped tokens, short-lived credentials, OAuth 2.0 client credentials flow, and what a properly minimal permission model looks like for agent payment calls.
Reconciliation at scale: logging what agents bought and why
The audit trail problem — how do you know what your agents spent money on, why they made the decision, and how to correlate payment events back to the agent reasoning chain? Practical patterns for structured logging and cost attribution.
Start with the AWS implementation guide
CloudFront, Lambda@Edge, WAF and Bedrock AgentCore — a production-ready x402 stack with working Lambda code for both the 402 gate and on-chain settlement.