Mason Hall

"I've seen things you people wouldn't believe.
Attack ships on fire off the shoulder of Orion.
I watched C-beams glitter in the dark near the Tannhäuser Gate.
All those moments will be lost in time, like tears in rain."

— Roy Batty, Blade Runner (1982)

Mason Hall

@0xMasonH

Building the payment layer for autonomous agents. Previously investing and engineering at a16z. Kardashev-scale accelerationist. Chess player. Believes agents that can discover and pay for their own APIs are 10x better at completing hard tasks.

Building

Merit Systems Poncho agentcash x402

Open source agentic payments. No API keys, no subscriptions — agents discover endpoints and pay with crypto. Like giving your agent a wallet and letting it loose on the internet.

Convictions

Agents that can pay for things are fundamentally more capable than agents that can't
The best infrastructure disappears — no signups, no dashboards, no billing pages
Open source wins. Permissionless wins. Composability wins.
We're building toward Kardashev Type I, and the tools should reflect that ambition
The most satisfying code is the kind where the compiler catches the bugs

Recent Transmissions

If any BD/sales/GTM people in my network are interested in getting early access to a powerful agent - DM me!

♥ 155 💬 44 👁 10.4k feb 18

An agent that can discover and pay for premium APIs without you is like 10x better at completing hard tasks

♥ 15 🔁 1 👁 475 feb 16

It's so deeply satisfying when using a language that catches most bugs at compile time OR has awesome linters / typecheckers.

What's the most gigabrain linting setup for typescript these days?

♥ 7 💬 4 👁 406 feb 17

      git commit -am "improvements"
      
        ♥ 3
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        feb 12
      

All those API calls will be lost in time,
like tears in rain.

Unless you put them on-chain. Then they're forever.
USDC on Base. Every transaction a proof of work done.

Previously

Investing + Engineering at a16z

Links

X / Twitter GitHub Poncho agentcash