here's a secret about x402: your wallet is your unique identifier and payment rail

One handle for identity and money. So many new possibilities.

this demo shows what I'm talking about (x402 shop pt. 2)

here are 3 ways you can take advantage + template link 🧵

Product & onchain AI @ Coinbase, Founder @ Vanderbilt Blockchain, EPF Fellow and SSF Enthusiast

1. Unified auth

a Telegram bot 👉 an MCP dashboard 👉 a voice agent. each greets me like an old friend because the wallet signature travels with me. No API keys, no OAuth dances. Sign once, glide everywhere.

he internet spent 30 yrs gluing identity systems to payment systems. x402 merges them into one primitive. Fewer moving parts, infinite new tricks.

@signinwitheth
 template: https://github.com/murrlincoln/siwe-x402-jwt

x402 github: https://github.com/coinbase/x402/

x402 docs: https://docs.cdp.coinbase.com/x402/docs/welcome/

3. Encrypted payloads, no extra keys:

Need to ship sensitive data? Encrypt with the requester’s wallet, only the matching private key can unwrap it. Zero extra KMS plumbing.

2. Choose‑your‑own pricing and flip the freemium script

Free tier → devs who link a wallet get 1k calls/month on the house

Pay‑as‑you‑go tier → strangers skip signup, ping the endpoint, auto‑settle micro‑fees

perfect for autonomous agents dynamically discovering services