React to LinkedIn post

curl --request POST \
  --url https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Team-SID: <api-key>' \
  --data '
{
  "linkedin_account_sid": "<string>",
  "entity_urn": "<string>"
}
'

import requests

url = "https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react"

payload = {
    "linkedin_account_sid": "<string>",
    "entity_urn": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Team-SID": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'Team-SID': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({linkedin_account_sid: '<string>', entity_urn: '<string>'})
};

fetch('https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'linkedin_account_sid' => '<string>',
    'entity_urn' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Team-SID: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react"

	payload := strings.NewReader("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"entity_urn\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Team-SID", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react")
  .header("Authorization", "Bearer <token>")
  .header("Team-SID", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"entity_urn\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Team-SID"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"linkedin_account_sid\": \"<string>\",\n  \"entity_urn\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body

{
  "success": true,
  "operation": "action",
  "action": "<string>",
  "item": "<unknown>",
  "result": {
    "activity_log": {}
  },
  "meta": {
    "trace_id": "<string>",
    "span_id": "<string>",
    "timestamp": "<string>",
    "duration_ms": 1,
    "debug_url": "<string>"
  }
}

{
  "success": false,
  "error": {
    "code": "validation_failed",
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "severity": "hard",
        "description": "<string>",
        "entity_sid": "<string>",
        "resolution": "<string>",
        "resolution_hint": "<string>",
        "count": 123
      }
    ],
    "context": {}
  },
  "meta": {
    "trace_id": "<string>",
    "span_id": "<string>",
    "timestamp": "<string>",
    "duration_ms": 1,
    "debug_url": "<string>"
  }
}

{
  "success": false,
  "error": {
    "code": "validation_failed",
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "severity": "hard",
        "description": "<string>",
        "entity_sid": "<string>",
        "resolution": "<string>",
        "resolution_hint": "<string>",
        "count": 123
      }
    ],
    "context": {}
  },
  "meta": {
    "trace_id": "<string>",
    "span_id": "<string>",
    "timestamp": "<string>",
    "duration_ms": 1,
    "debug_url": "<string>"
  }
}

linkedin_posting

React to LinkedIn post

Leave OUR reaction on any LinkedIn post, addressed by its post-thread URN in entity_urn (wire create-reaction): member posts by urn:li:activity:<id>, company-page posts and newsletter issues by urn:li:ugcPost:<id>. The social-selling counterpart of create_linkedin_comment, e.g. warm a prospect up by reacting to their post before a connect. Outward and fire-on-success: the post does NOT need to be tracked, and nothing is persisted on this service. Identity-bound: linkedin_account_sid REQUIRED, spends the react_posts bucket (30/day at a 360 s floor), saturation returns 429. Two different managed accounts reacting to the same post are two independent calls. Returns the activity-log row. To comment use create_linkedin_comment; to read who already reacted use the linkedin-scraping get-post-reactors tool. Contract: - MCP tool `react_linkedin_post`, registry package `mcp.linkedin/linkedin_posting`, mount `linkedin.content`. - Operation `action`, response envelope `action`. - Flags: dangerous: the MCP layer gates it behind a preview/commit token, and the effect cannot be undone through this API; mass action: this verb's own request accepts a filter or targets[] set, which the owning service drains; step eligible: gtm.service.orchestration can run this verb as a mass-action plan step, once per item.

POST

api

linkedin-posting

react

React to LinkedIn post

curl --request POST \
  --url https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Team-SID: <api-key>' \
  --data '
{
  "linkedin_account_sid": "<string>",
  "entity_urn": "<string>"
}
'

import requests

url = "https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react"

payload = {
    "linkedin_account_sid": "<string>",
    "entity_urn": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Team-SID": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    Authorization: 'Bearer <token>',
    'Team-SID': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({linkedin_account_sid: '<string>', entity_urn: '<string>'})
};

fetch('https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'linkedin_account_sid' => '<string>',
    'entity_urn' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Team-SID: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react"

	payload := strings.NewReader("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"entity_urn\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Team-SID", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react")
  .header("Authorization", "Bearer <token>")
  .header("Team-SID", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"entity_urn\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/react")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Team-SID"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"linkedin_account_sid\": \"<string>\",\n  \"entity_urn\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body

{
  "success": true,
  "operation": "action",
  "action": "<string>",
  "item": "<unknown>",
  "result": {
    "activity_log": {}
  },
  "meta": {
    "trace_id": "<string>",
    "span_id": "<string>",
    "timestamp": "<string>",
    "duration_ms": 1,
    "debug_url": "<string>"
  }
}

{
  "success": false,
  "error": {
    "code": "validation_failed",
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "severity": "hard",
        "description": "<string>",
        "entity_sid": "<string>",
        "resolution": "<string>",
        "resolution_hint": "<string>",
        "count": 123
      }
    ],
    "context": {}
  },
  "meta": {
    "trace_id": "<string>",
    "span_id": "<string>",
    "timestamp": "<string>",
    "duration_ms": 1,
    "debug_url": "<string>"
  }
}

{
  "success": false,
  "error": {
    "code": "validation_failed",
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "severity": "hard",
        "description": "<string>",
        "entity_sid": "<string>",
        "resolution": "<string>",
        "resolution_hint": "<string>",
        "count": 123
      }
    ],
    "context": {}
  },
  "meta": {
    "trace_id": "<string>",
    "span_id": "<string>",
    "timestamp": "<string>",
    "duration_ms": 1,
    "debug_url": "<string>"
  }
}

Authorizations

Authorization

string

header

required

Access token issued by gtm.service.id. Its access_identity claim carries team_sid, actor_sid and actor_type, and that team scope is authoritative.

Team-SID

string

header

required

Team scope for tokens that do not carry one. Ignored when the token already names a team.

Body

application/json

Request body of react_linkedin_post.

linkedin_account_sid

string

required

LinkedIn account sid (ln_ac_…), the authoring account. Identity-bound: REQUIRED, posts publish AS this account.

Required string length: 18

Pattern: ^ln_ac_

entity_urn

string

required

The post handle: urn:li:activity: for a member post, or urn:li:ugcPost: for a company-page post or a newsletter issue (LinkedIn threads those as ugcPost, not activity). Either form is passed to the wire verbatim. A post URL is also accepted when the id is in it: the feed permalink and the share link (/posts/-activity--) are both converted locally. A link WITHOUT an id (a shortlink, a bare slug URL) is refused 422 entity_urn_not_resolvable: reading those means opening the page, so call get_activity_urn_by_url first rather than have a write verb open a page silently. The post does NOT need to be tracked or owned by us. Renamed from activity_urn on 2026-07-30; the old name is no longer accepted.

Required string length: 1 - 512

reaction_type

enum<string> | null

The reaction to leave, mapped to the plugin wire ReactionType. Defaults to like.

Available options:

like,

celebrate,

support,

love,

insightful,

funny

Response

action success envelope.

success

enum<boolean>

required

Available options:

true

operation

enum<string>

required

Available options:

action

action

string

required

kebab-case verb; matches the route segment.

item

any

required

result

object

required

Show child attributes

Overview

LinkedIn API

ID and Teams API

Orchestration API

React to LinkedIn post

Authorizations

Body

Response