From monolith
to zerolith.
Serverless functions your AI agents can drive, or you can, straight from your dashboard. Deploy in seconds, pay only for what runs.
# just ask in plain language › Deploy this function and make it public. ✓ deploy_function → hello (python) ✓ update_function → visibility: public ✓ https://hello-fn-a1b2c3.api.zerolith.io
Built for modern
developers.
Your data stays in France.
Infrastructure hosted on OVH in France. Your functions, your database, your execution history — none of it leaves the country. GDPR compliance out of the box, nothing to configure.
Pay only for what runs.
When nobody calls your function, it costs nothing. No idle server, no minimum subscription. Billing starts at the invocation and stops at the millisecond.
Your AI agents talk straight to your functions.
Connect Claude, Cursor or any MCP-compatible agent to your account. The agent deploys, invokes and watches your functions without you handing it a single API key.
oauth 2.1 · remote · http
Every account in its own space.
Your code runs in a Kubernetes namespace that is yours alone, with its own quota, a deny-by-default NetworkPolicy and its own rights. That matters all the more when an agent is operating on your behalf.
quota 1 vCPU / 1 Gi / 10 pods
Two ways to work,
one tool.
Write your function
Python or Node.js. A handler(request) function is all it takes. No framework, no boilerplate.
Deploy in seconds
From the dashboard or the API — your function is live in seconds, isolated in your own Kubernetes namespace.
Invoke by URL
Every function exposes a URL. Callable from anywhere. Private, public or cron-triggered, your choice.
Connect your agent
Add Zerolith's MCP URL to Claude or your agent of choice. Authorization goes through OAuth 2.1 — no API key to share.
The agent deploys
The agent can create, change and invoke your functions on its own, from its own interface or in answer to your instructions.
You keep control
Every action the agent takes shows up in your dashboard. Logs, costs, history — full transparency.
Simple.
To the millisecond.
No subscription. No tiers. You pay exactly what your functions consume — by the resource, by the invocation.
≈ 10 million invocations.
- No credit card
- Dedicated Kubernetes namespace
- MCP Server included