> ## Documentation Index > Fetch the complete documentation index at: https://upstash.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Publish #### Publish to a URL with a 3 second delay and headers/body ```typescript theme={"system"} import { Client } from "@upstash/qstash"; const client = new Client({ 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](/qstash/sdks/ts/examples/url-groups#create-a-url-group-and-add-2-endpoints) ```typescript theme={"system"} import { Client } from "@upstash/qstash"; const client = new Client({ 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](/qstash/features/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`. ```typescript theme={"system"} import { Client } from "@upstash/qstash"; const client = new Client({ 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](https://upstash.com/pricing/qstash) ```typescript theme={"system"} import { Client } from "@upstash/qstash"; const client = new Client({ 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](/qstash/features/retry#custom-retry-delay). #### Publish HTML content instead of JSON ```typescript theme={"system"} import { Client } from "@upstash/qstash"; const client = new Client({ token: "" }); const res = await client.publish({ url: "https://my-api...", body: "

Hello World

", headers: { "Content-Type": "text/html", }, }); ``` #### Publish a message with [content-based-deduplication](/qstash/features/deduplication) ```typescript theme={"system"} import { Client } from "@upstash/qstash"; const client = new Client({ 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](/qstash/api-reference/messages/publish-a-message)) ```typescript theme={"system"} import { Client } from "@upstash/qstash"; const client = new Client({ token: "" }); const res = await client.publishJSON({ url: "https://my-api...", body: { hello: "world" }, timeout: "30s" // 30 seconds timeout }); ```