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Slack Add Reaction

n8n-nodes-base.httpRequest

Add an emoji reaction to a message in Slack using the reactions.add API. Supports any standard or custom emoji.

slack reaction emoji message response
App Slack
Category api integration
Version 1.0.0
Author Community
Credentials Slack OAuth2 API

💡 Use Cases

📚 API Documentation

Reference documentation for this API endpoint:

🔗 https://api.slack.com/methods/reactions.add ↗

📋 Node Configuration

{
  "nodes": [
    {
      "parameters": {
        "content": "## 👍 Slack Add Reaction\n\n**Usage:**\nAdd an emoji reaction to a message in Slack using the reactions.add API.\n\n**Required Input:**\n- `channel`: Channel ID containing the message\n- `timestamp`: Message timestamp (ts) to react to\n- `name`: Emoji name without colons (e.g., thumbsup, white_check_mark)\n\n**Setup:**\n1. Configure Slack OAuth2 credentials with `reactions:write` scope\n2. Pass channel ID, message timestamp, and emoji name\n3. Use standard or custom workspace emoji names\n\n**Output:**\nReturns ok: true on success",
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      },
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      "typeVersion": 1,
      "id": "sticky-slack-add-reaction-001",
      "name": "Sticky Note"
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://slack.com/api/reactions.add",
        "authentication": "genericCredentialType",
        "genericAuthType": "oAuth2Api",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Content-Type",
              "value": "application/json"
            }
          ]
        },
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={\n  \"channel\": \"{{ $json.channel }}\",\n  \"timestamp\": \"{{ $json.timestamp }}\",\n  \"name\": \"{{ $json.name }}\"\n}",
        "options": {}
      },
      "id": "slack-add-reaction-001",
      "name": "Slack Add Reaction",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.1,
      "position": [
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        400
      ],
      "credentials": {
        "oAuth2Api": {
          "id": "SlackOAuth2",
          "name": "Slack OAuth2"
        }
      }
    }
  ],
  "connections": {},
  "pinData": {},
  "meta": {
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    "instanceId": "88a4b441e9a4af333af67be3c0ab8888b79ffa2aca1a09ed7a885e93b689b75f"
  }
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      "description": "## 👍 Slack Add Reaction  **Usage:**"
    },
    "label": "Slack Add Reaction",
    "dependencies": {
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    },
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        "url": {
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          "title": "URL",
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          "buildship": {
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        },
        "authorization": {
          "description": "The authorization header for the API call, if required (e.g., Bearer or Basic token)",
          "type": "string",
          "title": "Authorization",
          "buildship": {
            "sensitive": true,
            "index": 2
          }
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          "type": "object",
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            "sensitive": false
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          "buildship": {
            "index": 4
          },
          "description": "The body to send with the API call",
          "title": "Body"
        },
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          "enum": [
            "application/json",
            "application/x-www-form-urlencoded",
            "multipart/form-data",
            "text/plain"
          ],
          "description": "The content type of the API call",
          "title": "Content Type",
          "buildship": {
            "index": 5,
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                "label": "application/json",
                "value": "application/json"
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        "shouldAwait": {
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          "buildship": {
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          }
        },
        "customHeaders": {
          "type": "object",
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          "description": "The HTTP status of the API response",
          "title": "Status"
        },
        "data": {
          "buildship": {
            "index": 1
          },
          "title": "Data",
          "type": "object",
          "description": "The data object from the API response"
        }
      },
      "type": "object"
    },
    "isCollapsed": false,
    "type": "script",
    "values": {
      "method": "POST",
      "url": "https://slack.com/api/reactions.add",
      "authorization": {
        "_$expression_": "`Bearer ${(await getSecret(\"ANONYMIZED_SECRET\"))}`",
        "type": "javascript",
        "hasErrors": false
      },
      "queryParams": {},
      "body": {
        "_$expression_": "{\n  \"channel\": ctx?.[\"root\"]?.[\"inputs\"]?.[\"body\"].channel,\n  \"timestamp\": ctx?.[\"root\"]?.[\"inputs\"]?.[\"body\"].timestamp,\n  \"name\": ctx?.[\"root\"]?.[\"inputs\"]?.[\"body\"].name\n}",
        "type": "javascript",
        "hasErrors": false
      },
      "contentType": "application/json",
      "shouldAwait": true,
      "customHeaders": {
        "Content-Type": "application/json"
      }
    }
  }
]
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            "handleErrors": false,
            "useNewZLibDeCompress": true
          },
          "mapper": {
            "ca": "",
            "qs": [],
            "url": "https://slack.com/api/reactions.add",
            "data": "{\n  \"channel\": {{1.channel}},\n  \"timestamp\": {{1.timestamp}},\n  \"name\": {{1.name}}\n}",
            "gzip": true,
            "method": "post",
            "headers": [
              {
                "name": "Content-Type",
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            "timeout": "",
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            "contentType": "application/json",
            "serializeUrl": false,
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            "parseResponse": true,
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            "useQuerystring": false,
            "followAllRedirects": false,
            "rejectUnauthorized": true
          },
          "metadata": {
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              "y": 300,
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                "label": "Request content"
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          }
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      ]
    }
  ],
  "metadata": {
    "version": 1
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}

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