AI Agents API

Social Media API for AI Agents

Let your agent write, schedule, and publish posts to every major social network. PostPeer ships an MCP server and a typed SDK, so any agent framework (Claude, GPT, LangChain, CrewAI) can post in one call.

Drop-in MCP server for Claude Code, Cursor, Zed, and any MCP client
Works with OpenAI function calling and Anthropic tool use out of the box
One endpoint covers Twitter, LinkedIn, Instagram, TikTok, YouTube, Pinterest, Bluesky
Schedule before publishing, review in the dashboard, cancel anytime

Start Posting for Free View Docs

No credit card required.

POST https://api.postpeer.dev/v1/posts
{ "platforms": ["twitter", "linkedin", "instagram], "content": "Hello world!" }

Published

5 platforms

TwitterLinkedInFacebook+2

All posts delivered

Scheduled

queue

Queued

847

Sent

Next: in 15 min

Platforms

connected

XIGFBLITT

One API, every platform

"I was up and running on six different platforms in under 30 minutes. Strongly recommend!"

David Flor, Founder at Darklight Interactive

"Couldn't figure out the official Pinterest API. PostPeer was smooth. Using it daily."

Divanshu Khatter, Marketing Manager at Sembark

"Great integration experience. Jonathan ships fixes within hours. Mad respect for the speed."

Het Tikawala, Founder at Kalizzle AI Studio

How It Works

Add social media to your product in three steps.

Get Your API Key

Sign up and get your API key instantly — no sales calls, no complex onboarding.

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 now supports every major social platform — without you maintaining a single integration.

API Response Format

Clean, structured JSON that's easy to parse and integrate

Request

POST

// Inside an Anthropic tool-use loop
const tools = [{
  name: "post_to_social",
  description: "Publish or schedule a post to one or more social platforms",
  input_schema: {
    type: "object",
    properties: {
      content: { type: "string" },
      platforms: { type: "array", items: { type: "object" } },
      scheduledFor: { type: "string" },
      timezone: { type: "string" }
    },
    required: ["content", "platforms"]
  }
}];

// When the model calls the tool:
await fetch("https://api.postpeer.dev/v1/posts", {
  method: "POST",
  headers: { "x-access-key": process.env.POSTPEER_API_KEY, "Content-Type": "application/json" },
  body: JSON.stringify(toolInput),
});

Response

JSON

{
  "success": true,
  "postId": "post_agent_001",
  "status": "published",
  "platforms": [
    {
      "platform": "twitter",
      "success": true,
      "platformPostUrl": "https://x.com/user/status/123"
    },
    {
      "platform": "linkedin",
      "success": true,
      "platformPostUrl": "https://www.linkedin.com/feed/update/urn:li:share:456"
    }
  ]
}

Built For Agent Workflows

PostPeer's API is designed for the way agents actually work. Small surface area, predictable shapes, sane defaults. Full setup tutorial at /blog/automate-social-media-with-claude-code-and-ai-agents.

Hosted MCP — Zero Install

Point your client at `https://mcp.postpeer.dev/mcp` with a Bearer token and your agent has 34 typed tools: post, schedule, list integrations, fetch analytics, manage profiles, BYOK apps, notifications, and more. Nothing to install, nothing to run locally.

Tool Calling for Any LLM

If your agent uses Anthropic tool use or OpenAI function calling, wrap the PostPeer REST endpoint as a single tool. The schema is small enough to fit comfortably in a system prompt.

34 Typed Tools

Every public PostPeer endpoint is exposed as a typed MCP tool. Your agent can chain calls — list integrations, pick one, post, fetch analytics — without ever touching raw HTTP.

Idempotent, Reviewable Scheduling

Have the agent schedule for an hour out instead of publishing immediately. You get a queue you can review in the dashboard before anything goes live. Agents make mistakes, queues catch them.

Cross-Platform In One Call

An agent that picks the right platform for each piece of content can fan out to all of them in a single request. PostPeer normalizes character limits, media formats, and OAuth scopes per platform.

Analytics For Feedback Loops

Pull impressions, likes, and engagement rates back into your agent so it can learn what works. One analytics endpoint, one credit per call, every connected platform.

More Platform APIs

Twitter / X Instagram YouTube YouTube Shorts

Frequently Asked Questions

Ready to Add Social Media to Your Product?

One API. Every platform. Start building with free credits.

Start Posting for FreeNo credit card required.