Collattice

Free plan APILinuxMacSelf-hostedWebWindows

What Collattice is

Collattice is a self-hosted kanban board for small teams where people and AI agents collaborate. It runs as a single executable with an embedded SQLite database, without requiring a separate database server, containers, or cloud account. A built-in MCP server exposes board operations to agents over Streamable HTTP, and a REST API supports board, card, user, and webhook management. Server-Sent Events stream board changes to connected clients. Board tools include drag-and-drop cards and lanes, Markdown descriptions and comments, cross-board search, labels, archiving, and dark and light themes. Outbound webhooks can send selected events to registered URLs, with optional signing secrets and delivery logs. Browser uploads support files up to 5 MB; API uploads support files up to 50 MB. The application creates an administrator authentication key on first run, and users receive keys for authentication. Webhook delivery to private and internal network addresses is blocked by default, and loopback, link-local, and cloud metadata addresses remain blocked even when the private-network option is enabled. Collattice is free under the MIT license.

Who it suits

Collattice suits small teams that want to host a shared board for people and AI agents. It offers agent access through MCP as well as a REST API.

What it does well

Single executable with embedded SQLite
Built-in MCP server for agent operations
Real-time board updates to connected clients
Free under the MIT license

What to know first

Browser uploads limited to 5 MB
API uploads limited to 50 MB
Users authenticate with keys

Limits

The free plan is self-hosted. Browser uploads are capped at 5 MB; API uploads allow up to 50 MB.

Plans

Plan	Billed and limits	Price
Free	Self-hosted · single executable · embedded SQLite	Free

As github.com lists them, read 4 Oct 2026. The maker's own page has the final word.

Getting started

Open the Collattice GitHub website.
Run the self-hosted executable; it uses an embedded SQLite database.
Use the administrator authentication key generated on first run.
Give users their authentication keys to access the application.

Verdict

Collattice combines a self-hosted kanban board with MCP and REST access, live updates, and webhook support. Its upload limits differ between browser and API use, so check them against your file needs.

Questions

Is Collattice free?

Yes. Its Free plan costs nothing and is self-hosted.

Is Collattice open source?

Yes. The repository identifies its license as MIT.

How do AI agents connect?

A built-in MCP server exposes board operations to agents over Streamable HTTP. A REST API is also documented.

What platforms does it support?

Its listed platforms are API, Linux, macOS, self-hosted, web, and Windows.

How does authentication work?

The application generates an administrator key on first run, and users receive keys for authentication.

How large can uploads be?

Browser uploads support files up to 5 MB. API uploads support files up to 50 MB.

Facts from Collattice's own pages

Agent support: A built-in MCP server exposes board operations to agents over Streamable HTTP. · github.com, 4 Oct 2026
Attachments: Browser uploads support files up to 5 MB, while API uploads support files up to 50 MB. · github.com, 4 Oct 2026
Audience: The project describes itself as designed for small teams where humans and AI agents collaborate on a shared board. · github.com, 4 Oct 2026
Authentication: The application generates an administrator auth key on first run, and users receive keys for authentication. · github.com, 4 Oct 2026
Board features: The board supports drag-and-drop cards and lanes, Markdown descriptions and comments, cross-board search, labels, archiving, and dark and light themes. · github.com, 4 Oct 2026
Deployment: It runs as a single executable with an embedded SQLite database and does not require a database server, containers, or a cloud account. · github.com, 4 Oct 2026
Integrations: Outbound webhooks can send selected board events to registered URLs, with optional signing secrets and delivery logs. · github.com, 4 Oct 2026
License: The repository identifies its license as MIT. · github.com, 4 Oct 2026
Live updates: Server-Sent Events stream board changes to connected clients in real time. · github.com, 4 Oct 2026
Platforms: Release downloads are listed for Windows 64-bit, macOS Apple Silicon and Intel, and Linux 64-bit and ARM64. · github.com, 4 Oct 2026
Purpose: Collattice is a self-hosted kanban board built for human-agent collaboration. · github.com, 4 Oct 2026
REST API: The project documents a REST API alongside its MCP tools for managing boards, cards, users, and webhooks. · github.com, 4 Oct 2026
Security: Webhook delivery to private and internal network addresses is blocked by default, with loopback, link-local, and cloud metadata addresses remaining blocked even when the private-network option is enabled. · github.com, 4 Oct 2026

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