​
Publish to a URL with a 3 second delay and headers/body

import { Client } from "@upstash/qstash";

const client = new Client({ token: "<QSTASH_TOKEN>" });
const res = await client.publishJSON({
  url: "https://my-api...",
  body: { hello: "world" },
  headers: { "test-header": "test-value" },
  delay: "3s",
});

​
Publish to a URL group with a 3 second delay and headers/body

You create URL group on the QStash console or using the URL Group API 
import { Client } from "@upstash/qstash";

const client = new Client({ token: "<QSTASH_TOKEN>" });
const res = await client.publishJSON({
  urlGroup: "my-url-group",
  body: { hello: "world" },
  headers: { "test-header": "test-value" },
  delay: "3s",
});

// When publishing to a URL Group, the response is an array of messages for each URL in the URL Group
console.log(res[0].messageId);

​
Publish a method with a callback URL

Callbacks are useful for long running functions. Here, QStash will return the response of the publish request to the callback URL. We also change the method to GET in this use case so QStash will make a GET request to the url. The default is POST. 
import { Client } from "@upstash/qstash";

const client = new Client({ token: "<QSTASH_TOKEN>" });
const res = await client.publishJSON({
  url: "https://my-api...",
  body: { hello: "world" },
  callback: "https://my-callback...",
  failureCallback: "https://my-failure-callback...",
  method: "GET",
});

​
Configure the number of retries

The max number of retries is based on your QStash plan 
import { Client } from "@upstash/qstash";

const client = new Client({ token: "<QSTASH_TOKEN>" });
const res = await client.publishJSON({
  url: "https://my-api...",
  body: { hello: "world" },
  retries: 1,
});
By default, the delay between retries is calculated using an exponential backoff algorithm. You can customize this using the retry_delay parameter. Check out the retries documentation to learn more about custom retry delay values.

​
Publish HTML content instead of JSON

import { Client } from "@upstash/qstash";

const client = new Client({ token: "<QSTASH_TOKEN>" });
const res = await client.publish({
  url: "https://my-api...",
  body: "<html><body><h1>Hello World</h1></body></html>",
  headers: {
    "Content-Type": "text/html",
  },
});

​
Publish a message with content-based-deduplication

import { Client } from "@upstash/qstash";

const client = new Client({ token: "<QSTASH_TOKEN>" });
const res = await client.publishJSON({
  url: "https://my-api...",
  body: { hello: "world" },
  contentBasedDeduplication: true,
});

​
Publish a message with timeout

Timeout value in seconds to use when calling a url (See Upstash-Timeout in Publish Message page) 
import { Client } from "@upstash/qstash";

const client = new Client({ token: "<QSTASH_TOKEN>" });
const res = await client.publishJSON({
  url: "https://my-api...",
  body: { hello: "world" },
  timeout: "30s" // 30 seconds timeout
});