OutX API - LinkedIn Social Listening & Automation API

OutX API docs - Social Listening API for LinkedIn monitoring and LinkedIn API for profile fetching, post retrieval, and engagement automation.

The OutX API lets you interact with LinkedIn programmatically, monitor keywords, track people and companies, fetch profiles, and automate engagement. All endpoints share the same base URL and authentication.

API Overview

The API is organized into two groups:

Watchlists & Engagement

Create watchlists that continuously monitor LinkedIn for keywords, people, and companies. Retrieve AI-categorized posts and automate engagement.

LinkedIn Data

Fetch LinkedIn profiles, get posts, like and comment, direct, on-demand API calls. All endpoints are async with task polling.

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Watchlists & Engagement

Create watchlists that continuously scan LinkedIn. OutX enriches posts with AI-generated categories and relevance scores.

Keyword Watchlists

Track LinkedIn posts that match your keywords or an AI-generated keyword set.

Method	Endpoint	Description	Details
POST	/api-keyword-watchlist	Create a watchlist (direct keywords or prompt)	Open
GET	/api-keyword-watchlist	List or fetch a single keyword watchlist	Open
PUT	/api-keyword-watchlist	Patch fields, replace keywords/labels, or regenerate from a new prompt	Open
DELETE	/api-keyword-watchlist	Delete a keyword watchlist	Open

People Watchlists

Track posts and activity from specific LinkedIn profiles.

Method	Endpoint	Description	Details
POST	/api-people-watchlist	Create a people watchlist	Open
GET	/api-people-watchlist	List or fetch a single people watchlist	Open
PUT	/api-people-watchlist	Patch fields and pause/resume	Open
DELETE	/api-people-watchlist	Delete a people watchlist	Open

Company Watchlists

Monitor LinkedIn company pages and their posts.

Method	Endpoint	Description	Details
POST	/api-company-watchlist	Create a company watchlist	Open
GET	/api-company-watchlist	List or fetch a single company watchlist	Open
PUT	/api-company-watchlist	Patch fields and pause/resume	Open
DELETE	/api-company-watchlist	Delete a company watchlist	Open

Posts and Engagement

Retrieve, like, and comment on posts surfaced by your watchlists.

Method	Endpoint	Description	Details
GET	/api-posts	Retrieve and filter posts (15+ parameters)	Open
GET	/api-interactions	List likes and comments performed via OutX	Open
POST	/api-like	Like a post	Open
POST	/api-comment	Comment on a post	Open

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LinkedIn Data

Fetch profiles, get posts, and engage. No watchlists needed. All LinkedIn Data endpoints are async: submit a request, get a task ID, then poll for results.

Method	Endpoint	Description	Details
POST	/linkedin-agent/fetch-profile	Fetch any LinkedIn profile by slug	Open
POST	/linkedin-agent/fetch-profiles-posts	Get posts from specific profiles by URN	Open
POST	/linkedin-agent/fetch-company	Fetch a LinkedIn company page	Open
POST	/linkedin-agent/fetch-company-posts	Get posts from specific companies	Open
POST	/linkedin-agent/search-profiles	Search LinkedIn for profiles by filters	Open
POST	/linkedin-agent/fetch-connections	Fetch your 1st-degree connections	Open
POST	/linkedin-agent/like-post	Like a LinkedIn post	Open
POST	/linkedin-agent/comment-post	Comment on a LinkedIn post	Open
POST	/linkedin-agent/send-message	Send a direct message to a 1st-degree connection	Open
POST	/linkedin-agent/send-connection-request	Send a connection request	Open
GET	/linkedin-agent/get-task-status	Check the result of an async task	Open

See the full LinkedIn Data section for details and quickstart.

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Base URL

All API requests should be made to:

https://api.outx.ai

Authentication

All endpoints require an API key in the x-api-key header:

x-api-key: YOUR_API_KEY

Get your API key at mentions.outx.ai/api-doc.

Prerequisites

Chrome extension required: At least one team member must have the OutX Chrome extension installed and active within the last 48 hours. Without this, API calls will return a 403 error. Learn more about the extension →

Rate Limits

The HTTP API itself has no rate limit, you can read or write to OutX endpoints (watchlists, posts, interactions) as often as you want. What is capped is the LinkedIn-side work those calls trigger: keyword scans, profile fetches, likes, comments. LinkedIn enforces a per-action daily limit on each LinkedIn account, and it counts the same whether the action originated in the OutX dashboard or via the API.

For LinkedIn-action calls (/linkedin-agent/*, /api-like, /api-comment) keep combined volume under ~50 calls per hour and spread throughout the day. See Rate Limits for the exact per-action caps and the live usage dashboard.

API calls do not consume OutX credits. Credits apply only to Sales Navigator export and the email finder.

Getting Started

1. Get Your API Key

   Visit mentions.outx.ai/api-doc and click “Reveal API Key”

2. Install Chrome Extension

   Install the OutX Chrome Extension on at least one team member’s browser

3. Make Your First Request

   Follow the Watchlist Quick Start or the LinkedIn Data Quick Start

Need Help?

Watchlist Quick Start

Create your first watchlist and retrieve posts

LinkedIn Data Quick Start

Fetch your first LinkedIn profile in 2 minutes

Use Cases

Common API workflows and patterns

Support

Contact our team for help

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Learn More

• LinkedIn API Guide - OutX Blog
• LinkedIn Social Listening Platform
• OutX Chrome Extension

Frequently Asked Questions

What is the difference between Watchlists and LinkedIn Data endpoints?

Watchlists & Engagement endpoints are for ongoing monitoring, you create watchlists (keyword, people, or company) and OutX continuously scans LinkedIn, enriches posts with AI categories and relevance scores. LinkedIn Data endpoints are for on-demand access, fetch a profile, get posts, like or comment as one-off async tasks. Use watchlists for continuous intelligence, and LinkedIn Data for direct lookups or AI agent integrations.

Do I need a paid plan to use the API?

API access is available on all plans, including the free plan. The HTTP API has no rate limit, but LinkedIn-side actions (keyword scans, profile fetches, likes, comments) are capped per LinkedIn account per day. See Rate Limits for the per-action caps.

Do API calls consume my OutX Credits?

No. API calls (watchlists, posts, engagement, LinkedIn Data, all of it) are unlimited on every paid plan and do not draw down credits. OutX Credits are a separate currency used only for Sales Navigator export and the email finder, where 1 exported lead or 1 verified email = 1 credit. See Pricing & Subscription for credit allocations.

Is there a webhook for real-time notifications?

OutX does not currently offer webhooks. Use a polling pattern, periodically call /api-posts with sort_by=recent_first to check for new posts. You can also set up Slack notifications through the OutX UI. See the Webhook-Style Monitoring use case.