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Send a Custom Message with Slack API

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HTTP requests, schedules and app events
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Send a Custom Message with the Slack API
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Getting Started

Create a workflow to Send a Custom Message with the Slack API. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

  1. Configure the Send a Custom Message action
    1. Connect your Slack account
    2. Optional- Configure Send as User
    3. Optional- Configure Bot Username
    4. Optional- Configure Icon (emoji)
    5. Optional- Configure Icon (image URL)
    6. Optional- Configure Schedule message
    7. Optional- Configure Include link to workflow
    8. Optional- Configure Metadata Event Type
    9. Optional- Configure Metadata Event Payload
    10. Select a Channel
    11. Configure Text
    12. Optional- Configure Send text as Slack mrkdwn
    13. Optional- Configure Attachments
    14. Optional- Configure Unfurl Links
    15. Optional- Configure Unful Media
    16. Optional- Configure Parse
    17. Optional- Configure Blocks
    18. Optional- Configure Link Names
    19. Optional- Configure Reply Broadcasts
    20. Optional- Configure Thread Timestamp
  2. Select a trigger to run your workflow on HTTP requests, schedules or app events
  3. Deploy the workflow
  4. Send a test event to validate your setup
  5. Turn on the trigger


This is a pre-built, open source component from Pipedream's GitHub repo. The component is developed by Pipedream and the community, and verified and maintained by Pipedream.

To contribute an update to an existing component or create a new component, create a PR on GitHub. If you're new to Pipedream component development, you can start with quickstarts for trigger span and action development, and then review the component API reference.

Send a Custom Message on Slack
Description:Customize advanced setttings and send a message to a channel, group or user. See [postMessage](https://api.slack.com/methods/chat.postMessage) or [scheduleMessage](https://api.slack.com/methods/chat.scheduleMessage) docs here


import common from "../common/send-message.mjs";

export default {
  key: "slack-send-custom-message",
  name: "Send a Custom Message",
  description: "Customize advanced setttings and send a message to a channel, group or user. See [postMessage](https://api.slack.com/methods/chat.postMessage) or [scheduleMessage](https://api.slack.com/methods/chat.scheduleMessage) docs here",
  version: "0.2.6",
  type: "action",
  props: {
    conversation: {
      propDefinition: [
    text: {
      propDefinition: [
    mrkdwn: {
      propDefinition: [
    attachments: {
      propDefinition: [
    unfurl_links: {
      propDefinition: [
    unfurl_media: {
      propDefinition: [
    parse: {
      propDefinition: [
    blocks: {
      propDefinition: [
    link_names: {
      propDefinition: [
    reply_broadcast: {
      propDefinition: [
    thread_ts: {
      propDefinition: [


This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI and CLI.
SlackslackappThis component uses the Slack app.
Send as Useras_userboolean

Optionally pass TRUE to post the message as the authed user, instead of as a bot. Defaults to FALSE.

Bot Usernameusernamestring

Optionally customize your bot's user name (default is Pipedream). Must be used in conjunction with as_user set to false, otherwise ignored.

Icon (emoji)icon_emojistring

Optionally provide an emoji to use as the icon for this message. E.g., :fire: Overrides icon_url. Must be used in conjunction with as_user set to false, otherwise ignored.

Icon (image URL)icon_urlstring

Optionally provide an image URL to use as the icon for this message. Must be used in conjunction with as_user set to false, otherwise ignored.

Schedule messagepost_atinteger

Messages can only be scheduled up to 120 days in advance, and cannot be scheduled for the past. The datetime format should be a unix timestamp (e.g., 1650507616, see here for help with this format).

Include link to workflowinclude_sent_via_pipedream_flagboolean

Defaults to true, includes a link to the workflow at the end of your Slack message.

Metadata Event Typemetadata_event_typestring

The name of the metadata event

Metadata Event Payloadmetadata_event_payloadstring

The payload of the metadata event. Must be a JSON string e.g. {"key": "value"}

ChannelconversationstringSelect a value from the drop down menu.

Text of the message to send (see Slack's formatting docs). This field is usually necessary, unless you're providing only attachments instead.

Send text as Slack mrkdwnmrkdwnboolean

TRUE by default. Pass FALSE to disable Slack markup parsing. See docs here


A JSON-based array of structured attachments, presented as a URL-encoded string (e.g., [{"pretext": "pre-hello", "text": "text-world"}]).

Unfurl Linksunfurl_linksboolean

TRUE by default. Pass FALSE to disable unfurling of links.

Unful Mediaunfurl_mediaboolean

TRUE by default. Pass FALSE to disable unfurling of media content.


Change how messages are treated. Defaults to none. See below.


Enter an array of structured blocks as a URL-encoded string. E.g., [{ "type": "section", "text": { "type": "mrkdwn", "text": "This is a mrkdwn section block :ghost: *this is bold*, and ~this is crossed out~, and <https://pipedream.com|this is a link>" }}]

Tip: Construct your blocks in a code step, return them as an array, and then pass the return value to this step.

Link Nameslink_namesstring

Find and link channel names and usernames.

Reply Broadcastsreply_broadcaststring

Used in conjunction with thread_ts and indicates whether reply should be made visible to everyone in the channel or conversation. Defaults to false.

Thread Timestampthread_tsstring

Provide another message's ts value to make this message a reply (e.g., if triggering on new Slack messages, enter {{event.ts}}). Avoid using a reply's ts value; use its parent instead.


Slack uses OAuth authentication. When you connect your Slack account, Pipedream will open a popup window where you can sign into Slack and grant Pipedream permission to connect to your account. Pipedream securely stores and automatically refreshes the OAuth tokens so you can easily authenticate any Slack API.

Pipedream requests the following authorization scopes when you connect your account:


About Slack

Slack is a channel-based messaging platform. With Slack, people can work together more effectively, connect all their software tools and services, and find the information they need to do their best work — all within a secure, enterprise-grade environment.

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