What Is MCP?

The Model Context Protocol (MCP) is an open standard that lets AI assistants connect to external tools and services. Think of it as a USB port for AI — instead of copying and pasting between your assistant and other tools, MCP lets the assistant call tools directly and work with the results.

PostNitro's MCP Server exposes 12 tools that give your assistant full access to carousel creation, template browsing, brand management, and output retrieval. Your assistant reads the tool descriptions, understands what's available, and uses them automatically when you ask for a carousel.

Learn more about MCP

Compatible Clients

Claude Code

Native support — drop-in config

Claude Desktop

Supported via mcp-remote

Cursor IDE

Native MCP support

ChatGPT

Via MCP plugin

Any MCP Client

Standard HTTP transport

What Can Your Assistant Do With PostNitro?

Generate Carousels with AI

Say "Create a LinkedIn carousel about 5 productivity tips" and your assistant calls PostNitro's AI to write content, design slides, and return ready-to-publish PNG or PDF files. Works from free-text topics, article URLs, or X/Twitter posts.

Import Custom Content

Already have your slide content? Tell your assistant the headings, descriptions, and images, and PostNitro renders them into a professionally designed carousel using your templates and brand kit.

Browse Templates & Brands

Ask "Show me my available templates" or "List my brands" and your assistant fetches your PostNitro library — template names, dimensions, brand colors, and AI preset configurations — without you opening a browser.

Set-and-Forget Defaults

Configure your preferred template, brand, AI preset, and output format once. Every future request uses those defaults automatically. Override any default on a per-call basis when needed.

One-Step Convenience

Don't want to manage async polling? The generate_and_wait and import_and_wait tools handle the entire flow — initiate, poll, and return output — in a single call.

Multiple Output Formats

Get individual PNG slide images for social media posting, or a single PDF document for LinkedIn carousel uploads. Your assistant delivers download links you can open immediately.

Quick Setup

Setup takes about 2 minutes. Get your PostNitro API key, add one config block to your client, and you're ready.

Step 1: Get Your API Key

Log in to postnitro.ai → click the profile icon (top right) → select Embed → Add your domains under Add Whitelist Domains → click Generate API Key → copy your key (starts with pn-).

Step 2: Configure Your Client

{
  "mcpServers": {
    "postnitro": {
      "type": "http",
      "url": "https://mcp.postnitro.ai/mcp",
      "headers": {
        "Authorization": "Bearer pn-your-api-key-here"
      }
    }
  }
}

{
  "mcpServers": {
    "postnitro": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://mcp.postnitro.ai/mcp",
        "--header",
        "Authorization: Bearer pn-your-api-key-here"
      ]
    }
  }
}

{
  "mcpServers": {
    "postnitro": {
      "type": "http",
      "url": "https://mcp.postnitro.ai/mcp",
      "headers": {
        "Authorization": "Bearer pn-your-api-key-here"
      }
    }
  }
}

{
  "mcpServers": {
    "postnitro": {
      "command": "node",
      "args": ["/path/to/postnitro-mcp-server/dist/index.js"],
      "env": {
        "TRANSPORT": "stdio",
        "POSTNITRO_API_KEY": "pn-your-api-key-here"
      }
    }
  }
}

Step 3: Set Your Defaults

Once connected, ask your assistant to list your templates, brands, and AI presets. Pick your favorites, then ask it to set your defaults. Done — every future carousel request uses these automatically.

All 12 MCP Tools

Configuration

Tool	Description
`postnitro_set_defaults`	Save default template, brand, preset, and output format. Persists across sessions.
`postnitro_get_defaults`	Retrieve your currently saved defaults.

Discovery

Tool	Description
`postnitro_list_templates`	List available carousel templates with IDs, names, dimensions, and aspect ratios. Paginated.
`postnitro_list_brands`	List brand configurations with IDs, names, and handles. Paginated.
`postnitro_list_ai_presets`	List AI presets with platform, tone, audience, language, slide count, and model. Paginated.
`postnitro_get_import_template`	Get the exact slide structure, field rules, infographic config, and example slides for imports.

Creation

Tool	Description
`postnitro_generate_carousel`	Start AI carousel generation from a topic, URL, or X post. Returns an embedPostId for tracking.
`postnitro_import_carousel`	Create a carousel from your own slide content. Returns an embedPostId.

Status & Output

Tool	Description
`postnitro_check_status`	Check generation status and view processing logs.
`postnitro_get_output`	Retrieve final PNG or PDF download URLs for a completed carousel.

Convenience (All-in-One)

Tool	Description
`postnitro_generate_and_wait`	Generate + poll + return output in a single call. No manual status checking.
`postnitro_import_and_wait`	Import + poll + return output in a single call.

Example Prompts

Once configured, these are real prompts you can send to your AI assistant:

Creating carousels:

“Create a LinkedIn carousel about 5 tips for remote work”

“Generate a carousel from this article: https://example.com/blog-post”

“Turn this tweet into a carousel: https://x.com/user/status/123”

Managing configuration:

“Show me my available templates”

“List my brands”

“Set my default template to [id] and brand to [id]”

“What are my current defaults?”

Importing content:

“Import these 5 slides as a carousel with my default template”

Your assistant handles the API calls, async polling, and file delivery behind the scenes. You just describe what you want.

Three Ways to Generate

From a Topic or Text

Describe what you want and the AI writes content, structures the slide flow, and designs everything.

"Create a 7-slide carousel about AI trends in 2026. Professional tone, actionable advice."

From an Article URL

Paste a blog post link. The AI extracts the key points and converts them into a concise, swipeable carousel.

"Turn this article into a carousel: https://yourblog.com/content-strategy-2026"

From an X Post or Thread

Repurpose a viral tweet or thread into a visual carousel for LinkedIn or Instagram.

"Convert this X thread into LinkedIn slides: https://x.com/username/status/1234567890"

Import Custom Slides

For full control, provide your own content. Your assistant sends it to PostNitro and returns designed slides using your template and brand kit.

{
  "slides": [
    {
      "type": "starting_slide",
      "heading": "How to Build a Content Strategy",
      "description": "Everything you need to know.",
      "cta_button": "Swipe to learn more"
    },
    {
      "type": "body_slide",
      "heading": "Step 1: Define Your Audience",
      "description": "Create detailed personas covering demographics and pain points."
    },
    {
      "type": "body_slide",
      "heading": "Step 2: Choose Your Platforms",
      "description": "Go where your audience already is. Focus on 2-3 platforms."
    },
    {
      "type": "ending_slide",
      "heading": "Ready to Get Started?",
      "cta_button": "Follow for More"
    }
  ]
}

Slide Rules

Every carousel needs exactly 1 starting_slide, at least 1 body_slide, and exactly 1 ending_slide. Heading is required on every slide.

Infographic Layouts

Body slides support images, background images, and infographic layouts (grid + cycle). Use postnitro_get_import_template to get the full slide structure reference.

Credits & Pricing

Plan	Price	Credits/Month	Typical Usage
Free	$0	5 credits	2–3 AI carousels for testing
Paid	From $10/mo	250+ (scalable)	Regular content creation

Operation	Credits per Slide
Content Import	1 credit per slide
AI Generation	2 credits per slide

A typical 6-slide AI carousel costs 12 credits. A 6-slide imported carousel costs 6 credits.

No credit card required for the free plan.

Get Your API Key — Free

Technical Specs

Spec	Detail
Protocol	Model Context Protocol (MCP) — Streamable HTTP
Endpoint	`https://mcp.postnitro.ai/mcp`
Health Check	`GET https://mcp.postnitro.ai/health`
Authentication	Authorization: Bearer api-key header
Server Mode	Stateless — one MCP instance per request, keyed by API key
Defaults Storage	Per-API-key JSON files, hashed with SHA-256
Output Formats	PNG (array of slide image URLs) or PDF (single document URL)
Supported Platforms	LinkedIn, Instagram, TikTok, X (Twitter), Threads
Version	1.0.0
License	MIT

PostNitro MCP vs Embed API vs OpenClaw Skill

	MCP Server	Embed API	OpenClaw Skill
Best for	AI assistant users (Claude, Cursor, ChatGPT)	Developers building custom integrations	OpenClaw agent users
Interface	Natural language via MCP-compatible client	REST API (HTTP requests)	Chat commands via Telegram/Slack/Discord
Setup	One JSON config block	API key + HTTP client	Skill install + env vars
Tools available	12 MCP tools (browse, create, configure)	4 REST endpoints	4 REST endpoints (wrapped)
Template/brand browsing	Yes — built-in discovery tools	Manual (via dashboard)	Manual (via dashboard)
Default configuration	Yes — persists across sessions	No — pass IDs every request	No — pass IDs every request
Convenience tools	Yes — generate_and_wait, import_and_wait	No — manual polling	No — manual polling
Self-hostable	Yes (Docker)	N/A (hosted API)	N/A (skill file)
Same API credits	Yes	Yes	Yes

Use the MCP Server if you work in Claude, Cursor, or another MCP client. Use the Embed API if you're building a custom integration or automation pipeline. Use the OpenClaw Skill if you run an OpenClaw agent.

Frequently Asked Questions

What is the PostNitro MCP Server?

What AI assistants are supported?

Is the MCP Server free?

How do I get an API key?

What's the difference between MCP and the Embed API?

Can I browse my templates and brands from the assistant?

Do my defaults persist?

Can I self-host the MCP Server?

What output formats are supported?

Can I use infographic layouts via MCP?

Related Resources

Embed API Documentation OpenClaw Skill AI Carousel Generator LinkedIn Carousel Generator Instagram Carousel Generator Pricing & Plans

PostNitro MCP Server — Create Carousels from Your AI Assistant

Generate professional carousel posts for LinkedIn, Instagram, TikTok, and X — without leaving your AI assistant. PostNitro's MCP Server connects Claude, Cursor, ChatGPT, and any MCP-compatible client directly to PostNitro's carousel engine. Just describe what you want in natural language, and your assistant handles template selection, AI content generation, slide design, and file delivery.

No browser. No manual design. Just conversation → carousels.

Endpoint: https://mcp.postnitro.ai/mcp

MCP Tools

12 tools

Platforms

LinkedIn, Instagram, TikTok, X, Threads

Output

PNG images, PDF documents

Free Credits

5/month (no card required)

Read the API Docs Get API Key