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The engine is free and stays free. Everything that makes an agent call an API correctly the first time is in the open-source gecko-surf you run yourself — no account, telemetry off by default. Cloud is what we’re building on top: the hosted, continuously-correct, cross-customer layer. This page describes what it’s becoming — honestly, it’s incoming, not shipped.

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Who pays, and why

The free engine is the funnel: any developer points it at any painful API and gets first-call-correct tools, forever, on their own machine. Cloud is where API providers pay — to make their API the one agents call correctly, keep it correct as it drifts, and turn more correct calls into more usage (and, wired to their payment rail, more revenue). You pay as you scale — free to start, more when you need more performance, exactly like Vercel or Mintlify.

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What Cloud adds over the free engine

gecko-surf — free, self-hosted, forever

  • Comprehend any OpenAPI → first-call-correct tools · auth hidden
  • $0 recorded mode · the MCP surface + one-click add — you host it
  • Anti-poisoning defenses + agent-native artifacts
  • Local eval + your own telemetry — on your disk, we see nothing
  • No account. Telemetry ships disabled.

Cloud — hosted, continuous, multiplayer (building)

  • Hosted MCP — always-on endpoint, nothing to run or scale
  • Drift-watch — re-comprehend when the API changes, alert before prod breaks
  • Access analytics — first-call-correct rate, dark ops, failed→settled
  • Correctness corpus — day-one-correct on a new API, from across the fleet
  • Team — shared surfaces, roles, audit, deploy-to-your-domain
Control-plane holds in the cloud. We store the API surface, the generated tool definitions, and correctness metadata — never your response payloads, user data, or secrets. No lock-in: you can go back to fully self-hosted anytime.

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Plans — you pay when you scale

The tier is what scales — performance and reach, not the core capability (that’s free).

Free

The open-source engine + a free hosted tier to try — shared throughput, best-effort latency. Point it at your API and see the agent-native surface today.

Pro (building)

Low latency, dedicated throughput, faster drift-watch, analytics, longer retention. For an API that’s becoming load-bearing for agents.

Scale (building)

SLA, high throughput, white-label private discoverability, onboarding. For an API that’s a real part of the agent economy.
We price the value — keeping your surface correct through drift and turning failed agent calls into settled ones — not the compute, and never a cut of what agents pay you. The model we’re building toward is a flat per-API subscription that steps up with performance/scale (Free → Pro → Scale), the Pro tier illustratively in the low hundreds/month per API, deliberately below the coding-agent seat you already pay for.
Prices are illustrative, not committed — they land when Cloud ships. We’d rather show you the shape honestly now than quote a number we haven’t earned the right to charge.

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Payments — you keep 100%

We collect our own flat fee over whatever rail fits you — x402 / USDC (or PayAI for recurring), or card / fiat via Privy, abacatepay, or Stripe. It’s an injected, neutral seam, so the rail is a config choice, not a rewrite. And when it comes to your API getting paid by agents, we compose your rail — we point the tools at your x402 endpoint (PayAI, Metera, or pay.sh) as part of the setup. You keep every cent; Gecko is never the payment rail and never a marketplace.

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How we make money, plainly

A flat monthly subscription per API we keep agent-correct and drift-watched — collected as our own fee, never a cut of what agents pay you. The engine developers use is free and open source; the compounding correctness corpus is the moat. Metera meters it; Gecko multiplies it.

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Come build it with us

Cloud is being built alongside the API providers who feel it most. If agents keep calling your API wrong — or you want it to be the one they call right — that’s exactly the surface we want to make agent-ready.

Bring your API

Join the Discord — we build in the open and figure out which API to make agent-ready next.

Run the free engine now

uvx --from "gecko-surf[serve]" gecko <spec> runs the whole engine on your machine today.