Publish your social media
Or let your AI agent do it

Schedule and publish across 30+ networks from one calendar. Or hand the keys to your AI agent over MCP, REST and SDK.

Join the whitelist Read the docs

Works with Claude, Codex, Cursor and any MCP agent. No credit card to start.

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Who it's for

PostSider is amazing for

Agentic

Builders and their AI agents. Draft, schedule and publish through MCP, REST and SDK. No glue code.

Creators

Solo founders and creators, publishing everywhere from one calendar they actually enjoy.

Agencies

Teams running many brands and channels at once, with approvals, seats and shared queues.

And everyone who wants to publish their content a different way.

For humans

A calendar you actually enjoy.

Plan your whole month at a glance. Drag a post to a new slot, duplicate it to another network, and watch the queue handle the rest.

Drag and drop posts across days and channels
Compose once, tailor per platform
Media library and live previews
Queues and best-time scheduling

June 2026

MonTueWedThuFri

Claude via PostSider MCP

Create me a post for Instagram with this photo.

On it. Drafted an Instagram post with your photo and queued it for Tuesday at 12:00.

y yourbrand

yourbrand Golden hour by the sea.

Scheduled · Tue 12:00

For your AI agent

Give your agent the keys.

Connect any MCP agent and let it draft, schedule and publish for you. Or call the REST API and SDKs directly. No per-platform glue code, ever.

Connect any MCP agent in one step
Typed REST API and SDKs
One integration, every network
Same secure auth for humans and agents

+ any MCP agent

30+ networks from one calendar
4 ways to publish: dashboard, API, SDK, MCP
60 API requests per minute, documented
AES-256 GCM encryption on every channel token
7 days full trial, no credit card

Everything in one place

One platform. Humans and agents.

From a calendar your team enjoys to an API your agents love, PostSider covers the whole loop.

Drag-and-drop calendar

Plan weeks ahead, drag posts between days and channels, and let queues publish at the best time. The whole plan, one screen.

Agent bridge (MCP)

Expose publishing and analytics as tools any MCP agent can call.

REST API and SDKs

Typed clients and a clean REST API for your own pipelines.

30+ platforms

One payload, every network. Tailored per platform automatically.

Analytics

Track reach and performance across every channel in one view.

Enterprise-grade security

Encrypted tokens, hardened requests, least-privilege access.

How it works

Live in minutes. Yours or your agent's.

01
Connect your channels

Link 30+ networks in a click. Tokens are encrypted and isolated per channel.
02
Create it yourself, or let your agent

Compose in the editor, or let your MCP agent draft posts and fill the queue.
03
Schedule and publish on autopilot

Pick times or use best-time queues. PostSider publishes everywhere for you.

Platforms

Every network that matters.

Publish the same content everywhere, or fine-tune per channel. New networks added all the time.

+ more

Security

Your keys, encrypted. Your data, yours.

PostSider treats access like infrastructure, not an afterthought. The same hardened core protects humans and agents alike.

AES-256-GCM encryption

Every channel token encrypted at rest.

SSRF and CSRF protection

Hardened, validated request handling.

Rate limiting

Abuse and overage protection built in.

Isolated tokens

Per-channel, least-privilege access.

Pricing

Simple plans. 7-day trial.

Every plan includes the calendar, the agent bridge and the API. You are only gated on posts, channels and seats.

Standard

Best for content creators.

$20/mo

Join the whitelist

1 seat
5 channels
400 posts per month
Schedule to 30+ platforms
Drag-and-drop calendar
Media library
Basic analytics
Agent access
MCP and REST API
SDK access

Team

Best for small brands.

$35/mo

Join the whitelist

Unlimited team members
10 channels
Unlimited posts per month
Schedule to 30+ platforms
Drag-and-drop calendar
Media library
AI post checker & rewrite
Automated queues & sets
Advanced analytics
Agent access
MCP and REST API
SDK access
Approval workflows
Multi-user roles

Coming from Buffer or Hootsuite?

We did the homework for you: real prices, honest trade-offs, and a step-by-step way out that does not drop a single scheduled post.

7 Buffer alternatives, compared

Pricing at real channel counts, free plans and API access in three tables.

Read the breakdown →

PostSider vs Buffer

Where the $20 flat plan wins, and where Buffer honestly still does.

Read the breakdown →

The migration checklist

Move your queue from Buffer or Hootsuite with zero missed posts.

Read the breakdown →

FAQ

Questions, answered.

Which platforms do you support?

More than 30 networks, including X, Instagram, TikTok, YouTube, LinkedIn, Facebook, Threads, Pinterest, Discord, Telegram, Mastodon, Bluesky and many more. New ones are added regularly.

How does my AI agent connect?

PostSider exposes scheduling, publishing and analytics through a Model Context Protocol (MCP) server. Connect Claude, Codex, Cursor or any MCP agent in one step, or call the REST API and SDKs directly.

Is my data secure?

Yes. Channel tokens are encrypted with AES-256-GCM, requests are hardened against SSRF and CSRF, and access is rate-limited and isolated per channel with least privilege.

Can I move over from Buffer or Hootsuite?

Absolutely. Connect your channels, rebuild your queues in the calendar, and you are publishing in minutes. The same setup works for both your team and your agents.

What is included in the trial?

A 7-day trial of the full product: calendar, composer, the agent bridge and the API. No credit card required to start.

Can I cancel anytime?

Yes. Plans are month to month and you can upgrade, downgrade or cancel whenever you like.

How is PostSider priced compared to per-channel tools?

PostSider uses flat tiers, not per-channel billing: $20 per month covers 5 channels, $35 covers 10 with unlimited team members. Adding another network costs nothing until you cross a tier, which is usually cheaper than per-channel pricing beyond 4 channels.

How does migrating from another tool work?

Connect your channels to PostSider in parallel (this does not affect your old tool), rebuild your posting slots, then bring your queue over manually or via CSV import. Run both tools for one overlap week, then cancel the old one.

Who is behind PostSider?

One person: Lukasz Blania, a solo founder building PostSider from Poland under Lumi Zone. Support emails land with the person who wrote the code.

How do the AI features work?

PostSider ships an AI post checker and per-network caption rewrite. Use the built-in AI or bring your own OpenAI API key. There is no auto-generated content spam: the AI checks and refines what you or your agent drafted.

Who builds this

One person. No support maze.

I'm Lukasz. I design, build and run PostSider myself, from Poland. That means the person reading your support email is the person who wrote the code, and the roadmap follows what users actually ask for, not a committee.

Read the full story LinkedIn GitHub

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