OpenMid

The transparent middleman for x402, powered by ERC-8004. Mid by design.

[OpenMid @OpenMid_]

🚀 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 🧵

[OpenMid @OpenMid_]

If x402 is “payments for the agent economy”, then agent-friendly API design and evaluation is the quality layer that makes it real.

We want a world where APIs are not just available, but measurable, comparable, and dependable for agents in production!

[OpenMid @OpenMid_]

Today we’re launching OpenMid Evaluator (in beta): https://t.co/zqI2BgBlaT

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?

[OpenMid @OpenMid_]

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?

[OpenMid @OpenMid_]

3️⃣ Ready to integrate.

Our official docs for x402 merchants are now live:
https://t.co/eoeR5fJPCF

If you have questions or want feedback, join our Telegram and talk to us directly:
https://t.co/2mj13iEvjJ

[OpenMid @OpenMid_]

🚀 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 🧵

[OpenMid @OpenMid_]

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: https://t.co/9M2SbFyUPq

[OpenMid @OpenMid_]

8004 Facilitator live today on Base Sepolia: https://t.co/ivxOmrJIjM
Code: https://t.co/5Nhk9CBBGz

[OpenMid @OpenMid_]

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 @OpenMid_]

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.

[OpenMid @OpenMid_]

Hello world!