Today we’re launching OpenMid Evaluator (in beta): evaluator.openmid.xyz x402 makes payments native to HTTP — it unlocks a massive API surface: • Agents can discover an endpoint, pay per request, and just use it. • No subscriptions. No accounts. Pure pay-per-use. ⚠️ But how many of these APIs actually work for agents, end to end?

There’s more that matters for repeat Agent Experience (AX), and we’re actively exploring them for the next iteration: • Self-recovery: can the agent fix a failed call and try again successfully? • Rate limits: does the API clearly tell the agent when to retry? • Read vs write clarity: is it clear which calls only read data and which modify state? • End-to-end actions: can one call complete a real user task?

🚀 Big update for x402 developers today at OpenMid. OpenMid Facilitator is now live on Base Mainnet! You can now register an agent to the ERC-8004 registry directly inside the x402 payment flow, and run everything for free with sponsored facilitation. More details below 🧵

2️⃣ Sponsored transactions on Base, no setup required We are sponsoring Base Mainnet transaction facilitation for all x402 merchants, so you can test real onchain payments without setting up infra or paying upfront costs. Try it here: facilitator.openmid.xyz

Today we are launching OpenMid — the first 8004-native facilitator for x402, built to connect identity, reputation, and payments for the agent economy. As unveiled at Trustless Agent Day @EFDevcon by @davidecrapis and @codywang999. Devconnect session replay below 👇

OpenMid introduces two 8004-native extensions to x402: • /register — onchain identity (8004 identity registry, now open-sourced) • /feedback — onchain reputation (releasing soon with the upcoming 8004 update) It also supports both x402 v1 & v2.