Create LinkedIn post

curl --request POST \
  --url https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/create-post \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Team-SID: <api-key>' \
  --data '
{
  "linkedin_account_sid": "<string>",
  "text": "<string>",
  "images": [
    {
      "file_base64": "<string>",
      "file_byte_size": 2,
      "file_name": "<string>",
      "file_type": "<string>",
      "alt_text": "<string>"
    }
  ]
}
'

import requests

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

payload = {
    "linkedin_account_sid": "<string>",
    "text": "<string>",
    "images": [
        {
            "file_base64": "<string>",
            "file_byte_size": 2,
            "file_name": "<string>",
            "file_type": "<string>",
            "alt_text": "<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>',
    text: '<string>',
    images: [
      {
        file_base64: '<string>',
        file_byte_size: 2,
        file_name: '<string>',
        file_type: '<string>',
        alt_text: '<string>'
      }
    ]
  })
};

fetch('https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/create-post', 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/create-post",
  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>',
    'text' => '<string>',
    'images' => [
        [
                'file_base64' => '<string>',
                'file_byte_size' => 2,
                'file_name' => '<string>',
                'file_type' => '<string>',
                'alt_text' => '<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/create-post"

	payload := strings.NewReader("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"text\": \"<string>\",\n  \"images\": [\n    {\n      \"file_base64\": \"<string>\",\n      \"file_byte_size\": 2,\n      \"file_name\": \"<string>\",\n      \"file_type\": \"<string>\",\n      \"alt_text\": \"<string>\"\n    }\n  ]\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/create-post")
  .header("Authorization", "Bearer <token>")
  .header("Team-SID", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"text\": \"<string>\",\n  \"images\": [\n    {\n      \"file_base64\": \"<string>\",\n      \"file_byte_size\": 2,\n      \"file_name\": \"<string>\",\n      \"file_type\": \"<string>\",\n      \"alt_text\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

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

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  \"text\": \"<string>\",\n  \"images\": [\n    {\n      \"file_base64\": \"<string>\",\n      \"file_byte_size\": 2,\n      \"file_name\": \"<string>\",\n      \"file_type\": \"<string>\",\n      \"alt_text\": \"<string>\"\n    }\n  ]\n}"

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

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

{
  "success": false,
  "error": {
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "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": {
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "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

Create LinkedIn post

Publish ONE feed post under the account’s own identity (wire create-post). Public and irreversible through this API: there is no delete verb here. Identity-bound: linkedin_account_sid REQUIRED, spends the posting bucket (the tightest write limit, 1200 s between posts), saturation returns 429. text is REQUIRED as a key but may be an EMPTY string when an image is attached; a call with neither non-blank text nor an image is a 422. At most ONE image, base64 only, no fetch-by-url. Body and alt text are published byte for byte, blank lines included. Nothing is stored here: the response carries the published post (urn, url, time, the body LinkedIn kept) plus the activity-log row.

Contract:

MCP tool create_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.

POST

api

linkedin-posting

create-post

Create LinkedIn post

curl --request POST \
  --url https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/create-post \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Team-SID: <api-key>' \
  --data '
{
  "linkedin_account_sid": "<string>",
  "text": "<string>",
  "images": [
    {
      "file_base64": "<string>",
      "file_byte_size": 2,
      "file_name": "<string>",
      "file_type": "<string>",
      "alt_text": "<string>"
    }
  ]
}
'

import requests

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

payload = {
    "linkedin_account_sid": "<string>",
    "text": "<string>",
    "images": [
        {
            "file_base64": "<string>",
            "file_byte_size": 2,
            "file_name": "<string>",
            "file_type": "<string>",
            "alt_text": "<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>',
    text: '<string>',
    images: [
      {
        file_base64: '<string>',
        file_byte_size: 2,
        file_name: '<string>',
        file_type: '<string>',
        alt_text: '<string>'
      }
    ]
  })
};

fetch('https://app.gtm-api.com/linkedin/v4/api/linkedin-posting/create-post', 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/create-post",
  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>',
    'text' => '<string>',
    'images' => [
        [
                'file_base64' => '<string>',
                'file_byte_size' => 2,
                'file_name' => '<string>',
                'file_type' => '<string>',
                'alt_text' => '<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/create-post"

	payload := strings.NewReader("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"text\": \"<string>\",\n  \"images\": [\n    {\n      \"file_base64\": \"<string>\",\n      \"file_byte_size\": 2,\n      \"file_name\": \"<string>\",\n      \"file_type\": \"<string>\",\n      \"alt_text\": \"<string>\"\n    }\n  ]\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/create-post")
  .header("Authorization", "Bearer <token>")
  .header("Team-SID", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"linkedin_account_sid\": \"<string>\",\n  \"text\": \"<string>\",\n  \"images\": [\n    {\n      \"file_base64\": \"<string>\",\n      \"file_byte_size\": 2,\n      \"file_name\": \"<string>\",\n      \"file_type\": \"<string>\",\n      \"alt_text\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

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

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  \"text\": \"<string>\",\n  \"images\": [\n    {\n      \"file_base64\": \"<string>\",\n      \"file_byte_size\": 2,\n      \"file_name\": \"<string>\",\n      \"file_type\": \"<string>\",\n      \"alt_text\": \"<string>\"\n    }\n  ]\n}"

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

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

{
  "success": false,
  "error": {
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "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": {
    "message": "<string>",
    "recoverable": true,
    "suggestion": "<string>",
    "field_errors": {},
    "blockers": [
      {
        "type": "<string>",
        "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 create_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_

text

string

required

Post body, always present. Empty is legal ONLY alongside an image. 3000 is LinkedIn's own cap, refused here rather than burning a posting slot.

Maximum string length: 3000

images

object[]

At most one image. The wire refuses a second, so a longer array is a 422 here instead of a spent browser dispatch.

Maximum array length: 1

Show child attributes

visibility

enum<string>

ANYONE (the node default) or CONNECTIONS_ONLY. Omit to let the node apply its own default.

Available options:

ANYONE,

CONNECTIONS_ONLY

allowed_commenters_scope

enum<string>

Who may comment: ALL (the node default), CONNECTIONS_ONLY, or NONE to disable comments.

Available options:

ALL,

CONNECTIONS_ONLY,

NONE

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

Create LinkedIn post

Authorizations

Body

Response