MCP server to post to social media — let Claude post for you

Updated June 2026 · Bluesky, Telegram, Mastodon, Discord live now · TikTok, Instagram, YouTube, X, LinkedIn in platform review.

What is an MCP server?

The Model Context Protocol (MCP) is an open standard for connecting AI agents to external tools and data. An MCP server advertises a set of tools — named functions with typed inputs — that a client like Claude Desktop, Claude Code, or Cursor can discover and call during a conversation. When you ask Claude to "post this to Bluesky," the model picks the right tool, fills in the arguments, and the MCP server does the real work.

Most "social media APIs" are REST endpoints you have to wire up yourself. PostWire is built MCP-first: the same posting engine is exposed as a first-class MCP server and a REST API, so an agent can use it with zero custom integration code.

The two PostWire tools

PostWire keeps the surface area small and predictable so agents reason about it reliably:

• list_platforms — returns the platforms connected to a brand and their current status (live vs. in review), so the agent knows where it can post before it tries.
• post_to_social — publishes a post. Pass the brand, the platforms to target, the text, and optional media URLs; PostWire fans it out to each network and returns per-platform results.

Add PostWire to Claude or Cursor

Point your MCP client at the PostWire endpoint with your API key from the dashboard. In Claude Desktop or Claude Code, drop this into your MCP config:

{
  "mcpServers": {
    "postwire": {
      "url": "https://postwire.io/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_POSTWIRE_API_KEY"
      }
    }
  }
}

Restart the client. Claude now sees post_to_social and list_platforms in its tool list. Ask it: "List my connected platforms, then post 'Shipping PostWire MCP today 🚀' to Bluesky and Mastodon."

JSON-RPC tool-call example

Under the hood, MCP tool calls are JSON-RPC. Here is what the client sends when the agent invokes post_to_social:

{
  "jsonrpc": "2.0",
  "id": 7,
  "method": "tools/call",
  "params": {
    "name": "post_to_social",
    "arguments": {
      "brand": "my-brand",
      "platforms": ["bluesky", "mastodon", "discord"],
      "text": "Shipping PostWire MCP today 🚀",
      "media": ["https://cdn.example.com/launch.png"]
    }
  }
}

Or call the REST API directly

If you're not using an agent, the same action is one HTTP call. Copy-paste:

curl -X POST https://postwire.io/api/post \
  -H "Authorization: Bearer YOUR_POSTWIRE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "brand": "my-brand",
    "platforms": ["bluesky", "telegram", "mastodon", "discord"],
    "text": "Shipping PostWire MCP today 🚀",
    "media": ["https://cdn.example.com/launch.png"]
  }'

Platform availability (June 2026)

Why PostWire over Ayrshare for agents

Ayrshare ships an MCP integration, but it is documentation-only — it can describe the API to your agent, but it cannot post. PostWire's MCP server exposes real post_to_social tooling that publishes. On price, PostWire's Agency plan covers 50 brands for $99 versus roughly $779 for comparable coverage on Ayrshare.

See the full breakdown on PostWire vs Ayrshare.

Flat per-brand pricing

FAQ

What is an MCP server for posting to social media?

An MCP (Model Context Protocol) server exposes tools that an AI agent like Claude can call. PostWire's MCP server exposes two tools — post_to_social and list_platforms — so Claude can actually publish posts to TikTok, Instagram, YouTube, LinkedIn, X, Bluesky, Telegram, Mastodon, and Discord without you writing any glue code.

How do I let Claude post to social media?

Add the PostWire MCP server to Claude Desktop, Claude Code, or Cursor by pointing it at https://postwire.io/mcp with your PostWire API key. Once connected, Claude sees the post_to_social and list_platforms tools and can publish directly. Setup takes about 60 seconds.

Which platforms can PostWire post to?

Bluesky, Telegram, Mastodon, and Discord are live now. TikTok, Instagram, YouTube, X, and LinkedIn are in platform review and rolling out as approvals land in 2026.

Does Ayrshare have a working MCP server?

No. Ayrshare's MCP is documentation-only — it can describe the API but cannot actually post. PostWire's MCP server exposes real post_to_social tooling that publishes for you.

How much does PostWire cost?

Flat per-brand pricing: Free $0 (1 brand, 30 posts/month), Starter $9, Pro $29, Agency $99 (50 brands), and Scale $299. The Agency plan covers 50 brands for $99 versus roughly $779 on Ayrshare.