Open source · MCP · Works with Claude, ChatGPT, Cursor, n8n
Every app has a side door.
Sideflap lets your AI agent work inside the apps that never shipped an API. Sign in once, and your agent can read and act in Booksy, Skool, Substack and hundreds more, over MCP, at human pace.
claude mcp add --transport http sideflap https://mcp.sideflap.devnpx sideflap@latest01 / The problem
The front door is locked.
Your agent can write code, plan your week and answer email. Then it hits the booking system, the community platform or the supplier portal you actually run your business on. No API. No MCP. Just a login screen.
No public API
API only on enterprise plans
API that does not do the one thing you need
02 / How it works
Sign in once. Your agent does the rest.
- 01
Sign in, once
Log in to the app yourself, in your own browser or a Sideflap cloud browser. 2FA stays with you. We never see or store your password.
- 02
The app becomes tools
Each app is exposed as typed MCP tools like
list_appointmentsoradd_client, plus a REST API with one key. - 03
Your agent works like you would
Same device profile, human pace, one session at a time. It is your session, on your terms, at a pace any app can live with.
// booksy (planned tools)
{
"app": "booksy",
"tools": [
"list_appointments",
"create_appointment",
"cancel_appointment",
"add_client",
"add_client_note",
"list_reviews",
"reply_to_review"
],
"pace": "human",
"approvals": ["cancel_appointment", "reply_to_review"]
}03 / Human pace
Calm by design.
Human pace by default
Pace limits per app, a queue, zero parallel hammering.
Your own session
A persistent browser profile. Your cookies stay put.
Stops at CAPTCHAs
When an app asks for verification, Sideflap stops and asks you. It never gets around it.
Runs on your machine, or ours
A plugin in your Chrome, or a cloud browser that runs 24/7.
You approve the risky stuff
Writes like send, pay and delete wait for your approval.
Full audit log
Every call: who, what, when, result.
04 / Self-healing
Apps change. Integrations fix themselves.
- 01
Monitor
Every app is tested on a schedule.
- 02
Detect
A changed button or flow is caught before you notice.
- 03
Repair
An agent rewrites the integration and runs the tests.
- 04
Verify
The fix ships only when every check passes.
05 / Apps
Request any app. The most wanted ship first.
06 / Open source
Open source at the core. Cloud when you want it 24/7.
Self-host
Free, open source- Chrome extension mode, your agent works in your own Chrome
- MCP server and REST API
- Community app definitions
- CLI
- Run it on your laptop or your server
Sideflap Cloud
Hosted- Always-on cloud browser
- Integrations monitored and repaired for you
- Team workspaces and approvals
- Audit log and usage limits
- Priority app requests
07 / Security
Your accounts stay yours.
- okYour password is never stored
- okBrowser profiles are encrypted at rest
- okRead and write permissions per app
- okApprovals for sensitive actions
- okPage content is treated as untrusted (prompt injection guard)
- okOpen source, so you can audit every line
08 / Pricing
Free to self-host. Pay as you go in the cloud.
Cloud
Free credits to start, then pay only for successful calls. Failed calls are free.
Pricing details at launch
Start freeTeams and enterprise: talk to us
09 / FAQ
Questions, answered.
How is this different from a browser agent?
A browser agent figures out a site from scratch every time. Sideflap gives your agent stable, tested tools for each app, so the same action works the same way every time, faster and cheaper.
Is this allowed?
Sideflap acts inside your own account, with your login and your approval. Some apps restrict automation in their terms, so every app page shows a risk level and you decide what to connect.
Will my account get banned?
Sideflap is calm by design: your own session, human pace, and it stops and asks you at any CAPTCHA. No tool can promise zero risk, which is why every app shows a risk level and pace limits are on by default.
Do I need to keep my laptop on?
With the Chrome extension or self-host, your agent works while your machine does. Sideflap Cloud is the option for always-on, so your laptop can stay closed.
Which agents does it work with?
Anything that speaks MCP: Claude, ChatGPT, Cursor, n8n, and more. There is also a REST API for scripts.
Can I add an app myself?
Yes. App definitions are open source. Open a pull request or request an app and we build it.
Your agent deserves a way in.
claude mcp add --transport http sideflap https://mcp.sideflap.devnpx sideflap@latest