Engineering notes from production x402.

Multi-chain settlement at scale, agent integration patterns, failure modes we hit and how we fixed them, cost analysis vs traditional API billing. Written for developers building agentic systems and operators evaluating x402 for production use.

• Cloudflare Workers x402: Edge-Native Agentic Payments

  Build AI agents on Cloudflare Workers with x402 cellular eSIM payments. Edge-deployed HTTP 402 integration guide with code samples — with code, fee math, and

  2026-06-24·11 min read·x402 / cloudflare-workers / agentic-payments

• LangChain x402 Agent: Pay-per-API-Call Without Keys

  Build a LangChain agent that buys eSIM connectivity with stablecoin payments via x402. No API keys, no pre-registration—autonomous cellular failover

  2026-06-17·13 min read·x402 / langchain / tutorial

• Bedrock AgentCore x402 Volume Report: $847K in First 30 Days

  AWS Bedrock AgentCore processed $847K USDC in x402 payments for cellular eSIM activation in May 2026. Latency, gas costs, and failover patterns

  2026-06-10·10 min read·x402 / bedrock / production

• x402 Facilitator Architecture: Polygon eSIM Dispatch Flow

  How our x402 facilitator coordinates agent → blockchain → eSIM carrier in under 10 seconds. Includes Polygon contract code, production metrics, and error

  2026-05-27·11 min read·x402 / architecture / polygon

• x402 vs Stripe Connect for AI Agent APIs: When Each Wins

  Compare x402 and Stripe Connect for agent payments. Settlement speed, gas costs, trust models, and the $60 crossover point explained with prod metrics

  2026-05-20·10 min read·x402 / comparison / cost-analysis

• Bedrock AgentCore x402: Production Integration in 30 Minutes

  Step-by-step guide to integrate AWS Bedrock AgentCore with x402 stablecoin payments for autonomous eSIM provisioning. Production-ready code included

  2026-05-14·8 min read·bedrock / x402 / tutorial

• How we process x402 eSIM orders in production: the full architecture

  Engineering tour of a real production x402 service — facilitator selection, Polygon + TON multi-chain settlement, payment-state machine, fulfilment, and what we got wrong.

  2026-05-13·5 min read·x402 / production / polygon