social api

One API for every social platform.

No credit card required.

one request · X + Instagram

POST https://api.kingscrosslabs.com/v1/posts

{
  "content": "We shipped it.",
  "platforms": ["x", "instagram"],
  "publishNow": true
}

Delivery status

Published · 2 platforms
X · Instagram
Scheduled · 12 queued
Next delivery in 15 min
Delivered this month · 847 posts
Across 4 connected accounts

supported platforms

One API, every social platform

Connect an account once. Publish everywhere, without building or babysitting a single integration.

X
Instagram
TikTok
YouTube
Facebook
Threads
Pinterest
Bluesky
Google Business

In progress

Tell us what else you want to see from us.

how it works

Add social posting to your product in three steps

Get your API key

Hop on a short call with us and we get you onboarded with a key the same day. No procurement, no months-long integration project.

Integrate in minutes

A single endpoint to post, schedule, and manage content. Drop it into your product and go.

Your users post everywhere

Your product supports every major social network, and you never maintain an integration for any of them.

built your way

One integration. Every way to build.

Whether your team writes the request by hand or hands it to an agent, it is the same contract underneath.

rest api

One endpoint

One predictable endpoint for every network. Connect accounts once, then publish everywhere.

sdks

Typed clients

Drop-in clients for Node.js and Python, generated from the same API contract.

agents

Agent ready

Give Claude, Codex, Cursor, or your own agent a clean way to create and schedule posts.

webhooks

Live status

React to account connections and post status changes the moment they happen.

const res = await fetch("https://api.kingscrosslabs.com/v1/posts", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${apiKey}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    content: "We shipped it.",
    platforms: ["x", "instagram"],
    publishNow: true,
  }),
});

what you get

Everything you need to ship social features

Skip months of integration work. Give your product real publishing, scheduling, and reporting with one API.

Multi-network publishing

Built-in scheduling

No OAuth hassle

Multi-account management

Post analytics

Instant delivery

no-code

You don't have to write code to use it

Wire social posting into the automation tools your team already runs, or hand the whole thing to an agent.

Zapier
Make
n8n
ChatGPT
Claude Code
Grok Bot
Hermes Agent
MCP server
Agent skills

faq

Frequently asked questions

Can I try it before paying for anything?

You can get started for free and try it before paying. We do ask that you hop on a call with us first so we can get you onboarded quickly.

How do I get access?

Hop on a call with us and we will onboard you and issue your API key. You can start for free and try it out before you pay for anything.

Which social networks are supported?

X, Instagram, TikTok, YouTube, Facebook, Threads, Pinterest, Bluesky, and Google Business are supported today. LinkedIn and Reddit are in progress — tell us what else you want to see from us.

Do I need to create developer apps or go through a review process on each platform?

No. We maintain the developer apps on every platform and go through each review process ourselves. We also manage token refresh cycles, platform updates, and any content reviews that need to happen. All you have to manage is one API key — we take care of the rest.

What happens if a post fails on one platform?

The other platforms still go out. You get a per-platform status on the response plus a webhook when anything changes, so you can surface a precise error instead of a generic failure.

Can I schedule posts for later?

Yes. Send a scheduled time instead of publishNow and the post sits in the queue until it is due. You can list, update, or cancel anything in the queue through the API.

Is this only for developers or companies building products?

No. You can also use it if you are a creator, marketer, founder, or growth person who wants to reach your marketing and social media APIs through Claude, ChatGPT, Cursor, or any other AI agent.

Power your next project with one social API

Get started

Start with free credits. No credit card required.