Slack: Adds a reaction to an item

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Operation slack.reactions_add

Provider route: POST /reactions.add. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/slack with npm, or alter-sdk-slack with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { SlackIntegration } from "@alter-ai/slack";

async function execute(input: Parameters<SlackIntegration["reactions"]["add"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new SlackIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.reactions.add(input);
    const result = await call.wait();
    return result.bodyJson();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_slack import SlackIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = SlackIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.reactions.add(arguments)
        result = await call.wait()
        return result.body_json()

Input

Field	Type	Presence	Description and constraints
$	object	Root	Additional keys: not allowed
body	object	Required within parent
body.channel	string	Required within parent	Channel where the message to add reaction to was posted.
body.name	string	Required within parent	Reaction (emoji) name
body.timestamp	string	Required within parent	Timestamp of the message to add reaction to.

Response

Response media type: application/json. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
$	object	Root	Schema for successful response from reactions.add method
ok	boolean	Required within parent	Must equal: true

Policy, approvals and errors

SDK function policy ID: slack.reactions_add. Catalog operation: reactions_add. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Required provider scopes: ["reactions:write"]

Official provider source