You Already Shipped Webhooks. Agents Pay $5K/Month.

Stripe's own AI benchmark says it out loud — agents can't verify webhook signatures. They forget idempotency keys. They ship test keys to prod. You've been doing this right for five years. Every webhook handler you wrote. Every signature you validated. Every retry you tuned with exponential backoff. That's a moat now. Trigger dot dev just raised sixteen million for agent workflows. X402 just crossed one hundred sixty-five million agent transactions. Stripe ships an entire docs section on agentic billing workflows because their own AI fails at this. Wrap your webhook expertise as one MCP server. Niche it — Stripe handler. Shopify handler. Twilio handler. List it on Circle Agent Marketplace. Five hundred tools, live this week. Agents pay one cent per verification. They pay nineteen dollars a month, per dev, for a robust handler. Two hundred fifty subscribers in your niche — five thousand a month. Recurring. Drop the webhook scar that taught you this in the comments. Part 2 next week — the build.