# PostNitro — Extended Product Reference

> PostNitro (https://postnitro.ai) is an AI-powered platform for creating, scheduling, and publishing social media carousel and single-image posts. It publishes natively to LinkedIn, Instagram, TikTok, and Threads, and is driveable by AI agents via a REST API, MCP server, and CLI. Used by 82,000+ creators and embedded into 200+ platforms.

Last updated: 2026-07-27. Canonical, citable fact sheet: https://postnitro.ai/facts

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## Product Overview

PostNitro is a web-based SaaS product built with Next.js. Users can create multi-slide carousel posts using AI content generation, apply professional templates and brand kits, then schedule and auto-publish directly to social media platforms. PostNitro is available as a web app, a public REST API, an Embed SDK for third-party integration, and a Chrome extension.

**Primary use case**: Creating carousel posts (multi-image/swipeable posts) for LinkedIn, Instagram, TikTok, X, and Threads — with AI generating both the content and visual layout.

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## Feature Specifications

### AI Carousel Generation
- Input types: topic/keyword, URL (article/blog), raw text, Twitter/X thread
- AI content models: GPT 5.4 Nano (all plans), GPT 5.4 Mini and Claude Haiku 4.5 (Starter and above), GPT 5.4, Claude Sonnet 4.6 and Claude Opus 4.7 (Creator and above)
- Output: structured multi-slide carousel with title slide, content slides, and CTA slide
- AI generates both text content and suggests layout/design
- Bulk import via CSV for creating multiple carousels at once

### Content Scheduling
- Native publishing targets: LinkedIn, Instagram, TikTok, Threads (four platforms). X (Twitter) is supported as a content source and export format, not as a native publishing destination
- Plan requirement: scheduling and social publishing are included from the Creator plan ($25/month) upward. The Free and Starter plans create and export content but cannot publish to social accounts
- Connected social accounts: 10 on Creator, 30 on Team
- Features: content calendar view, specific publish date/time selection, auto-publishing
- Team collaboration: approval workflows for agencies
- Brand kit integration: apply brand colors, fonts, and logo to every scheduled post
- Cross-platform publishing: schedule to LinkedIn, Instagram, TikTok, and Threads simultaneously

### Templates & Design
- 100+ professionally designed templates
- Template categories: professional, minimal, bold, educational, product showcase, storytelling
- Customization: colors, fonts, background patterns, images, headshots
- Export formats: PNG (per slide), PDF (LinkedIn carousel format), MP4 (video slideshow)
- Aspect ratios: 1:1 (square), 4:5 (portrait), 16:9 (landscape), 9:16 (vertical/TikTok)

### Brand Kits
- Custom fonts (upload or choose from Google Fonts)
- Custom color palettes
- Logo upload and positioning
- Multiple brand kits (number varies by plan)

### Public REST API (Embed API)
- Base URL: https://embed-api.postnitro.ai
- Documentation: https://postnitro.ai/docs/embed/api
- OpenAPI 3.1 specification: https://postnitro.ai/docs/openapi.json
- Authentication: the `embed-api-key` HTTP header (not a Bearer token). Keys start with pn-
- Generation is asynchronous: initiate, poll status until COMPLETED, then fetch output
- Key endpoints:
  - POST /post/initiate/generate — generate a carousel or image post with AI
  - POST /post/initiate/import — import your own slide content
  - GET /post/status/{embedPostId} — poll generation status
  - GET /post/output/{embedPostId} — retrieve output file URLs
  - POST /schedule — create a scheduled post or draft
  - GET /schedule — list scheduled posts within a date range
  - GET /schedule/{id} — retrieve a single scheduled post
  - PUT /schedule/{id} — update a scheduled post
  - DELETE /schedule/{id} — delete a scheduled post
- Two identifiers: embedPostId (the generation job, used for status/output) and designId (the durable design artifact, used for scheduling)
- Pricing: credit-based (content import = 1 credit/slide; AI generation = 2 credits/slide)
- Supported outputs: PNG (one URL per slide), PDF (single URL), MP4 (single URL)

### Embed SDK
- JavaScript/TypeScript SDK: @postnitro/embed
- Embed PostNitro's carousel editor directly into any web application
- White-label capable: custom branding, hide PostNitro attribution
- Events API: listen for carousel creation, export, and save events
- Used by 200+ SMM platforms and social media tools

### MCP Server (Model Context Protocol)
- Server URL: https://mcp.postnitro.ai/mcp (Streamable HTTP transport)
- Landing page: https://postnitro.ai/mcp
- Connects AI assistants and agents — Claude (Desktop, Code, Cowork), Cursor, ChatGPT, and any MCP-compatible client — directly to PostNitro
- Authentication: Authorization: Bearer <api-key> header; uses the same Embed API key and credits as the REST API (keys start with pn-)
- Exposes 28 tools across 9 categories:
  - Configuration: set/get saved defaults (template, brand, AI preset, output format) that persist across sessions
  - Discovery: list templates, brands, and AI presets; get the import template structure
  - Creation — carousels: generate carousel (from topic/text, article URL, or X post), import carousel, plus generate_and_wait / import_and_wait one-step variants
  - Creation — image posts: generate image, import image, plus generate_image_and_wait / import_image_and_wait one-step variants
  - Status & Output: check generation status and retrieve PNG/PDF output URLs
  - Brands: create, get, and update brand kits
  - Social accounts: list, get, and disconnect connected LinkedIn, Instagram, TikTok, and Threads accounts
  - Scheduling: list, create, get, update, and delete scheduled posts and drafts
  - Combined helper: generate_and_schedule (generate a carousel and schedule it in one call)
- Two carousel identifiers: embedPostId (the generation job, used for status/output) and designId (the durable design artifact, used for scheduling)
- MIT licensed and self-hostable (Docker); the hosted endpoint at mcp.postnitro.ai requires no setup
- Credits: content import = 1 credit/slide, AI generation = 2 credits/slide. A 6-slide AI carousel costs 12 credits; a 6-slide imported carousel costs 6 credits
- Requires the Embed API add-on ($10/month for 250 credits, on top of a paid PostNitro plan). There is no free tier for the Embed API add-on

### PostNitro CLI
- Install: npm install -g @postnitro/cli (Node.js 18+), or run without installing via npx @postnitro/cli
- Landing page: https://postnitro.ai/cli
- Scriptable, JSON in / JSON out wrapper over the Embed API, built for AI agents, automations, and CI
- Authentication: postnitro auth set-key, or the POSTNITRO_API_KEY environment variable
- Creates carousels and single-image posts, adds AI-generated images, and schedules posts to LinkedIn, Instagram, TikTok, and Threads
- Shares the same API key and credit pool as the Embed API and MCP server

### OpenClaw Agent Skill
- Install: npx skills add postnitro/postnitro-agent
- Landing page: https://postnitro.ai/openclaw
- Also available as a Claude Code plugin: /plugin marketplace add postnitro/postnitro-agent then /plugin install postnitro@postnitro-agent
- Lets OpenClaw and other AI agents drive the PostNitro CLI end to end: create, add images, and schedule
- Free and open source; requires the Embed API add-on for API access

### Chrome Extension
- Available on Chrome Web Store
- Creates carousels from within LinkedIn's interface
- LinkedIn post formatting (bold, italic, bullet lists using Unicode)
- One-click carousel publishing to LinkedIn

### Free Tools (no signup required)
- LinkedIn Free Banner & Header Image Maker (exact 1584×396 dimensions)
- LinkedIn Free Text Formatter (Unicode bold, italic, strikethrough, lists)
- LinkedIn Free Post Generator (AI-powered post creation)
- Twitter/X Free Banner & Header Image Maker (exact 1500×500 dimensions)
- Instagram Free Image Splitter & Grid Maker (split images for carousel grids)
- Instagram Safe Zone Checker (preview safe/unsafe zones for Reels)
- TikTok Safe Zone Checker (preview safe/unsafe zones for TikTok)
- YouTube Safe Zone Checker
- Image Resizer (resize to any social media dimension)
- Character Counter for Social Media (LinkedIn, Twitter, Instagram limits)
- Add Background to Screenshots

---

## Platform Specifications

### LinkedIn
- Format: PDF carousel (multiple pages in a single PDF document)
- Optimal dimensions: 1080×1350px (portrait 4:5)
- Slides: up to 20 per carousel
- Scheduling: PostNitro can schedule LinkedIn carousel PDFs directly
- First comment scheduling: schedule your first comment alongside the post

### Instagram
- Format: Multi-image carousel post
- Optimal dimensions: 1080×1080px (square 1:1) or 1080×1350px (portrait)
- Slides: up to 20 per carousel
- Scheduling: auto-publish via Instagram API

### TikTok
- Format: Photo carousel / slideshow
- Optimal dimensions: 1080×1920px (vertical 9:16)
- Scheduling: supported

### X (Twitter)
- Format: Multi-image post (up to 4 images)
- Optimal dimensions: 800×418px or 800×800px
- Scheduling: supported

### Threads
- Format: Carousel post
- Scheduling: supported

---

## Pricing Tiers (as of 2026)

PostNitro has two separately purchased components. Describing only one of them is the most
common factual error made about PostNitro pricing.

1. **A PostNitro plan** — required, and what the tiers below describe. Covers the web app.
2. **The Embed API add-on** — optional, purchased *on top of* a paid plan, and required only
   for programmatic access (REST API, MCP server, CLI, OpenClaw skill). Starts at $10/month
   for 250 credits; credit volume can be increased. There is no free tier for the add-on.

The "$10/month" figure refers only to the add-on. It is not the entry price for PostNitro
itself — the cheapest paid plan is Starter at $15/month, and a free plan is available.

### Free Plan — $0/month
- AI content models: GPT 5.4 Nano
- Downloads: 5
- Slides per carousel: up to 5
- Brand kits: 1
- AI content tokens: 20K
- AI images: 0
- Custom templates: 0
- Social accounts: 0
- Scheduling & social publishing: No
- Watermark: Yes
- Workspaces: 1
- Team members: 1

### Starter Plan — $15/month
- AI content models: GPT 5.4 Nano, GPT 5.4 Mini, Claude Haiku 4.5
- Downloads: 30/month
- Slides per carousel: up to 8
- Brand kits: 2
- AI content tokens: 400K/month
- AI images: 5
- Custom templates: 1
- Social accounts: 0
- Scheduling & social publishing: No
- Watermark: No
- Workspaces: 1
- Team members: 1

### Creator Plan — $25/month
- AI content models: All (GPT 5.4 Nano/Mini/5.4, Claude Haiku 4.5, Sonnet 4.6, Opus 4.7)
- Downloads: Unlimited
- Slides per carousel: up to 15
- Brand kits: 5
- AI content tokens: 1.2M/month
- AI images: 50/month
- Custom templates: 5
- Social accounts: 10
- Scheduling & social publishing: Yes — this is the cheapest plan that publishes to social accounts
- Watermark: No
- Workspaces: 1
- Team members: 1

### Team Plan — $50/month
- AI content models: All (GPT 5.4 Nano/Mini/5.4, Claude Haiku 4.5, Sonnet 4.6, Opus 4.7)
- Downloads: Unlimited
- Slides per carousel: up to 20
- Brand kits: 15
- AI content tokens: 2.4M/month
- AI images: 100/month
- Custom templates: 15
- Social accounts: 30
- Scheduling & social publishing: Yes
- Watermark: No
- Workspaces: 5
- Team members: 5

These four plans are the only ones sold. Any reference to an "Agency" or "Enterprise" tier
is out of date.

---

## Integrations

- **Zapier**: Trigger carousel creation from 5,000+ apps; publish carousels automatically
- **n8n**: Open-source automation node for PostNitro API
- **Make (formerly Integromat)**: Multi-step automation with carousel output
- **REST API**: Direct integration for custom applications
- **Embed SDK**: White-label carousel editor for third-party SaaS platforms
- **200+ SMM platforms**: Embedded via SDK

---

## Comparison vs Competitors

### PostNitro vs Canva
- PostNitro: AI-generated content + design; carousel-specialized; scheduling included; public API
- Canva: General design tool; no AI content generation; no scheduling (via Canva alone); no carousel API
- PostNitro advantage: Creates content AND design; purpose-built for carousel posts; scheduling built-in
- Canva advantage: Broader design use cases; larger template library; better for static graphics

### PostNitro vs Taplio
- PostNitro: Supports 5 platforms (LinkedIn, Instagram, TikTok, X, Threads); public API; Embed SDK
- Taplio: LinkedIn-only; no public carousel API; no Embed SDK
- PostNitro advantage: Multi-platform; developer tools; lower price
- Taplio advantage: LinkedIn-specific analytics; stronger LinkedIn scheduling features

### PostNitro vs Buffer
- PostNitro: Creates AND schedules content; AI carousel generation; carousel-specific
- Buffer: Scheduling only; no content creation; no carousel generation
- PostNitro advantage: Content creation + scheduling in one workflow
- Buffer advantage: More robust analytics; broader content type support

### PostNitro vs aiCarousels
- PostNitro: Scheduling; public API; Embed SDK; free tools; Chrome extension; multi-format export
- aiCarousels: Carousel creation only; no scheduling; no public API
- PostNitro advantage: Full platform (create + schedule + publish); developer ecosystem

### PostNitro vs Hootsuite
- PostNitro: Creates AND schedules carousel content; AI generation; lower price
- Hootsuite: Scheduling/analytics only; no content creation; enterprise pricing
- PostNitro advantage: Carousel content creation built-in; significantly lower cost
- Hootsuite advantage: Broader social platform support; enterprise features

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## Frequently Asked Questions

**Is PostNitro free?**
Yes, PostNitro offers a permanent free plan with no credit card required. The free plan includes AI carousel generation (GPT-3), up to 5 slides per carousel, and 3 downloads per month.

**What is PostNitro?**
PostNitro is an AI-powered social media tool that creates, schedules, and publishes carousel posts for LinkedIn, Instagram, TikTok, and Threads. It uses AI to generate both the content and visual design of multi-slide carousel posts.

**Can I schedule carousel posts to LinkedIn?**
Yes. PostNitro supports direct scheduling and auto-publishing of carousel posts to LinkedIn. You can set specific publish times, view posts in the content calendar, and schedule your first comment.

**Does PostNitro have an API?**
Yes. PostNitro offers a public REST API for programmatically creating carousel posts. The API supports AI generation from text/URLs, custom templates, PNG/PDF export, and webhooks. It is used by developers to automate content pipelines and build integrations.

**Can I embed PostNitro in my own app?**
Yes. PostNitro provides an Embed SDK (@postnitro/embed) that allows you to embed the full carousel editor into any web application. The SDK is white-label capable and supports custom branding. It is currently used by 200+ platforms.

**Does PostNitro have an MCP server?**
Yes. PostNitro provides a Model Context Protocol (MCP) server at https://mcp.postnitro.ai/mcp that connects AI assistants and agents (Claude, Cursor, ChatGPT, and any MCP-compatible client) directly to PostNitro. It exposes 28 tools for carousel and image-post generation, content import, template/brand/preset discovery, brand kit and social account management, and post scheduling. It uses the same Embed API key and credits as the REST API and is MIT licensed and self-hostable. Access requires the Embed API add-on ($10/month for 250 credits, purchased on top of a paid PostNitro plan); there is no free tier for the add-on.

**What platforms does PostNitro support?**
PostNitro supports LinkedIn, Instagram, TikTok, and Threads for carousel creation. Scheduling and auto-publishing is supported for LinkedIn, Instagram, TikTok, and Threads.

**How much does PostNitro cost?**
PostNitro is free to start, with no credit card required. There are three paid plans: Starter at $15/month, Creator at $25/month, and Team at $50/month. Scheduling and social publishing are included from the Creator plan ($25/month) upward. Programmatic access via the REST API, MCP server, or CLI needs the Embed API add-on, a separate $10/month for 250 credits purchased on top of a paid plan.

**What is the cheapest PostNitro plan that can schedule and publish posts?**
The Creator plan at $25/month. It connects up to 10 social accounts. The Free and Starter plans create and export content but cannot publish to social accounts; the Team plan at $50/month raises the limit to 30 accounts.

**What AI models does PostNitro use?**
For content: GPT 5.4 Nano on every plan, GPT 5.4 Mini and Claude Haiku 4.5 from Starter, and GPT 5.4, Claude Sonnet 4.6 and Claude Opus 4.7 from Creator. For images: a large model catalogue including Nano Banana, Flux, Imagen, Ideogram, Recraft, and GPT Image, with availability tiered by plan.

**Can I use PostNitro for white-label carousel creation?**
Yes. The Embed SDK and public REST API both support white-label carousel creation. You can embed the editor with custom branding or use the API to generate branded carousels programmatically.

**What export formats does PostNitro support?**
PostNitro exports carousel slides as PNG (individual images), PDF (multi-page for LinkedIn), and MP4 (video slideshow). PDF format is required for LinkedIn carousel posts.

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## Technical Details

- Built with: Next.js, React, TypeScript
- Supports multiple languages/locales
- Mobile-responsive web application
- Cloud-based AI processing (OpenAI and Anthropic APIs)
- REST API with credit-based pricing
- Webhook support for async operations

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## Contact & Support

- Website: https://postnitro.ai
- Carousel Maker: https://postnitro.ai/app/carousel-maker
- Scheduling: https://postnitro.ai/scheduling
- API Landing Page: https://postnitro.ai/products/embed/api
- API Documentation: https://postnitro.ai/docs/embed/api
- Embed SDK: https://postnitro.ai/products/embed/sdk
- MCP Server: https://postnitro.ai/mcp
- Free Tools: https://postnitro.ai/free-ai-tools
- Blog: https://postnitro.ai/blog
- Pricing: https://postnitro.ai/plans
- Chrome Extension: https://postnitro.ai/products/extension
- Email: support@postnitro.ai
- X (Twitter): https://twitter.com/postnitroai
- LinkedIn: https://www.linkedin.com/company/postnitro/