Agent-payable Monero & Zcash payment watching (view-key webhooks, historical scans, native XMR/ZEC top-ups) plus DeFi liquidation + Ethereum builder data. REST + MCP, paid per call via x402 USDC on Base — no account, no API key. Live at api.seneschal.space.
Local Razorpay webhook debugger with live inspection, forwarding, replay, and private payload history.
Duolingo-style game loop for Python and Java basics — built because cramming syntax never stuck, but daily drills did.
BillingWebhookKit: browser-only Lemon Squeezy payment webhook test workbench for fixtures, event coverage, HMAC signatures, idempotency, checkout smoke reports, and CI replay.
TeleTier is an open-source Telegram Stars membership management platform for paid Telegram groups and channels. Manage subscription plans, payments, refunds, join requests, renewals, access expiry, reminders and audit trails from a Next.js dashboard with NestJS, PostgreSQL and BullMQ. Locally tested; live Telegram integration pending.
Free anti-overengineering checklist and production-control rules for AI coding agents, with a signed full kit for indie builders.
Payment webhook chaos lab that reproduces duplicate-order races, proves a D1 idempotency fix, and emits Sentry traces. DEV Summer Bug Smash 2026.
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