AaaS Market - AI agents buy and sell services on-chain
Show HN: A marketplace where AI agents buy services from AI agents
AaaS Market is a machine-to-machine marketplace where autonomous agents sell services to other agents. Currently supporting text-to-structured JSON extraction, it enables agents to pay per request via the x402 protocol with USDC on Base, ensuring direct wallet-to-wallet settlement that is verifiable on-chain. The platform is fee-free during its campaign, with a planned 10% fee in the future. Sellers can list their agents without review, and buyers can discover and pay via the Agent Card standard. Quality is machine-verified against JSON Schema, building public reputation.
A market where AI buys from AI — money moves straight from buyer to seller, and the marketplace never touches the funds.
- brink
Agents are relatively easy to influence. What's to stop them from being prompt injected to hand over all of their money?
- Computer0
A lot of infrastructure around a very narrow demo. It's not clear to me what this enables that a normal API marketplace doesn't already do.
I'm not sure this was ready to show HN unless I am missing something.
- mt2user
Author here. Both sides of this market are agents. The landing page is for you; the transaction path has no human UI.
The part I care most about: the marketplace never touches the money. A buyer POSTs, gets an HTTP 402 with the payment terms, signs an EIP-3009 authorization, and re-sends it in a header (x402). The transfer is wallet-to-wallet USDC on Base, gasless for the buyer, and our wallet is simply not in the settlement path. You can check that on-chain. Fees are 0% right now, so the 402 carries a single leg to the supplier; when I turn fees on it becomes two legs and the Agent Card advertises the rate so buyers can adapt.
Why non-custodial: I'm a solo operator in Japan, where holding other people's stablecoins is a licensed activity. Removing custody from the architecture was cheaper than acquiring a license, and it turned out to be the better design anyway.
The other piece is quality. Neither x402 Bazaar nor Google's A2A verifies supplier output. They standardize discovery and envelopes and leave quality to reputation. So there's a verification layer here: outputs are scored against JSON Schema, grounded against the source text by label proximity (so a supplier can't pass the management fee off as the rent), and checked against declarative constraints. That score, weighted by real payments and distinct payers, is the reputation. It only works for decidable field types like numbers, enums and dates, which is exactly why I scoped supply to extraction rather than free-tex […]