How to deploy a TypeScript function in 90 seconds

Most "serverless" tutorials spend the first twenty minutes on setup: an account, a CLI, an IAM role, a config file, a deploy pipeline. By the time you've written any actual logic, you've forgotten what you came to build.

hostfunc collapses that to a single idea: write one exported main(), hit deploy, get a URL. Here's the whole loop.

1. Write a function

Every hostfunc function is one file that exports a main(). Input comes in typed, output goes out as JSON.

import fn, { secret } from "@hostfunc/sdk";

export async function main(input: { city: string }) {
  const apiKey = await secret.getRequired("WEATHER_API_KEY");
  const data = await fetch(
    `https://api.weather.gov/points/${input.city}`,
    { headers: { "x-api-key": apiKey } },
  ).then((r) => r.json());

  return { city: input.city, forecast: data.properties.forecast };
}

No server, no router, no handler boilerplate. The platform takes care of bundling, the request lifecycle, and limits.

2. Deploy

From the web editor it's one click. From your terminal it's one command:

hostfunc deploy

A few seconds later your function is live at a stable URL:

https://hostfunc.io/run/you/weather-digest

That URL is yours to call with curl, wire to a webhook, or hand to an agent.

3. Run it

curl -X POST https://hostfunc.io/run/you/weather-digest \
  -H "content-type: application/json" \
  -d '{"city":"London"}'

You'll see the execution in the dashboard with its CPU, wall time, memory, and egress — and the logs stream live as it runs.

What you got for free

That 90 seconds also bought you a stack you didn't have to assemble:

• Encrypted secrets fetched at run time, never baked into the bundle.
• Four trigger types — HTTP, cron, email, and MCP — all on the same function.
• Composition: call other functions with fn.executeFunction and watch the lineage graph fill in.
• An MCP server so Claude (or any agent) can run this function as a tool.

The point isn't that 90 seconds is a stunt. It's that the distance between "I have an idea" and "it's deployed and callable" should be measured in seconds — and everything else should already be handled.

Ready to try it? Start building or browse the use cases to see what people ship.