Deno Deploy - Upstash Documentation

This is a step by step guide on how to receive webhooks from QStash in your Deno deploy project.

1. Create a new project

Go to https://dash.deno.com/projects and create a new playground project.

2. Edit the handler function

Then paste the following code into the browser editor:

import { serve } from "https://deno.land/std@0.142.0/http/server.ts";import { Receiver } from "https://deno.land/x/upstash_qstash@v0.1.4/mod.ts";serve(async (req: Request) => {  const r = new Receiver({    currentSigningKey: Deno.env.get("QSTASH_CURRENT_SIGNING_KEY")!,    nextSigningKey: Deno.env.get("QSTASH_NEXT_SIGNING_KEY")!,  });  const isValid = await r    .verify({      signature: req.headers.get("Upstash-Signature")!,      body: await req.text(),    })    .catch((err: Error) => {      console.error(err);      return false;    });  if (!isValid) {    return new Response("Invalid signature", { status: 401 });  }  console.log("The signature was valid");  // do work  return new Response("OK", { status: 200 });});

3. Add your signing keys

Click on the settings button at the top of the screen and then click + Add Variable

Get your current and next signing key from Upstash and then set them in deno deploy.

4. Deploy

Simply click on Save & Deploy at the top of the screen.

5. Publish a message

Make note of the url displayed in the top right. This is the public url of your project.

curl --request POST "https://qstash.upstash.io/v2/publish/https://early-frog-33.deno.dev" \     -H "Authorization: Bearer <QSTASH_TOKEN>" \     -H "Content-Type: application/json" \     -d "{ \"hello\": \"world\"}"

In the logs you should see something like this:

start time: 2.21 ms

Listening on http://localhost:8000/The signature was valid

Next Steps

That's it, you have successfully created a secure deno API, that receives and verifies incoming webhooks from qstash.

Learn more about publishing a message to qstash here