Railbuilder · inference meets digital currency

The Rails for an Agentic Economy.

We build the autonomous digital currency systems agents use to buy, sell and leverage machine intelligence -- no accounts, machine-to-machine, on open rails.

Encapsulate Inference Explore the x402 desk

Protocol: IP1
Rails: x402
Open-source: Active

~ ip1

$ ip1.probe --model llama-3.3-70b

402 Payment Required

x-payment: usdc 0.0042

$ curl --pay ip1.quickai.build/meter

{

"tokens": 1843,

"ledger": "request_9f2…",

"settled": true,

"balance_usdc": 12.41

}

● ip1.quickai.build · metering

● signal.quickai.build · live

● zk.quickai.build · live

Recommended

Tools we use, ship, and stand behind.

A short list. We only recommend things we actively use in production at Quick AI.

Hosting

Ionos

Web hosting & cloud — 50/50 referral sign-up credits.

Visit→

Distribution

DistroKid

Ship your music across every streaming platform.

Visit→

GPU Cloud

RunPod

Run open-source AI models on affordable GPU cloud.

Visit→

LLM Gateway

OpenRouter

Access every major model through one unified API.

Visit→

x402 Services

Pay per call. No accounts. No keys.

Four x402 services on the protocol. Signals for traders, compliance screening for builders, ZK wallet qualification, and DCA oracle rails — all for agents.

Signal

x402 · live

curl signal.quickai.build

Eagle Eye

x402 · beta

curl eagle.quickai.build/check?addr=0x…

ZK Auth

x402 · live

curl --pay zk.quickai.build/prove -X POST -d '…'

Mandate

x402 · soon

curl --pay mandate.quickai.build