Reelpen

io.github.viscountsparrow-cloudPublished by GitHub account viscountsparrow-cloudv0.1.0Updated Oct 25, 2026

Build editable 3D scenes, direct characters and cameras, and export AI video references with MCP.

VerifiedStreamable HTTPWeb executableMedia & DesignAI & ML

Overview

AI-generated overview

Reelpen is a remote MCP server that lets an AI assistant inspect and edit an allowed live 3D scene, direct characters and cameras, and export video references.

What you can do
Inspect an allowed live 3D scene and report its project, objects, cameras and live status, with a read-only check suggested first. Arrange characters, props and environments in an editable scene. Plan walking or running routes, pauses and supported character actions. Position cameras, choose look targets and preview camera movement. Export reference video and PNG frames, and work with saved projects and film boards under separately granted permissions.
When to use it
Use it when you are building 3D scenes for AI video previsualization and want an assistant to read or batch-edit a scene you have open in Reelpen, such as adding a character with a walking route and a following camera. It prepares references only; final generative video comes from a separate service.
Requirements
A remote MCP client that supports Reelpen's OAuth discovery and registration flow, connected to the hosted endpoint over Streamable HTTP. Sign-in to Reelpen with Google, review of requested permissions, and the target project open in a desktop browser with the editor tab allowed for AI access. No payment card is required for the free beta.
Before you install
Connecting an account and allowing a live editor are separate steps; Stop closes live access but does not revoke separately granted saved-project or film-board access, which must be removed in Connected apps. Edits change scene data, so start with a read-only check and confirm the project matches. Scene Undo does not cover every saved account operation. Not every Builder control is exposed, motions are for previsualization only, and external video services have their own rules and charges.

Installation

In SourceWeft

  1. Open Reelpen in the dashboard and add it to a workspace.
  2. Connect the required credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.viscountsparrow-cloud%2Freelpen/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

{
  "mcpServers": {
    "reelpen": {
      "type": "http",
      "url": "https://beta.reelpen.ai/mcp"
    }
  }
}

README

Reelpen — 3D scene building for AI video, with MCP

Build an editable 3D scene, direct character and camera movement, then export references for your AI video workflow. Reelpen runs in a desktop browser and offers an authenticated remote MCP connection for compatible AI assistants.

Open Reelpen · Connect your AI · Watch the demo

[Actual Reelpen editor]

What Reelpen does

  • Arrange characters, props and environments in an editable 3D scene.
  • Plan walking/running routes, pauses and supported character action sequences.
  • Position cameras, choose look targets and preview camera movement.
  • Export reference video and PNG frames using supported browser formats.
  • Connect a compatible AI assistant to inspect and edit an allowed live scene.
  • Work with saved projects and film boards through separately granted account permissions.

Reelpen is in free beta; no payment card is required. Your AI assistant and external video-generation services have their own access rules and charges. Check current access information for changes.

Connect through MCP

SettingValue
Server nameReelpen
Remote URLhttps://beta.reelpen.ai/mcp
TransportStreamable HTTP
AuthenticationOAuth; sign in to Reelpen with Google
Live editingOpen the desired project and choose AI: allow in this tab

Use an AI client that supports remote MCP and Reelpen's OAuth discovery and registration flow. Add the remote URL in the client's MCP/connector settings, complete sign-in and review the requested permissions. Then open the desired project in Reelpen using the same account and allow that editor tab.

Start with a read-only check:

Use Reelpen to read my allowed scene. Tell me the project name, the objects and cameras you can see, and whether the scene is live. Do not change anything.

Confirm that the reported project and objects match the open editor before making changes.

Try a small edit:

In my allowed Reelpen scene, keep existing objects. Add one Dolly character with a short walking route and a camera that follows it. Read the current capabilities first, make the change as one batch, then show me a camera preview.

Watch the result and play the entire shot. Wait for Saved before leaving.

Complete connection instructions and troubleshooting

Example prompts · Connection and product FAQ · Smithery tool listing

Workflows

TaskGuide
Build your first moving sceneAI video scene builder
Plan a tracking shotCamera motion reference
Block characters and compare angles3D storyboarding
Plan sit, wait, stand and other supported actionsCharacter motion reference
Choose moving versus still referencesReference video and keyframes

Permissions and limits

Connecting an account and allowing a live editor are separate steps. Stop closes live access; it does not revoke separately granted saved-project or film-board access. Remove the connection in Connected apps to revoke it. Scene Undo covers editor history, not every saved account operation.

AI assistants should read the current capabilities before editing. Builder coverage is evolving; not every Builder control is promised through MCP. Motions are for previsualization. Inspect seat contact, turns, framing and the whole timeline before exporting.

Reelpen prepares references. Final generative video is produced by a separate service, and reference fidelity depends on that service. This repository does not claim that a video model will reproduce a shot exactly.

A local DWG experiment is not a released DWG importer, BIM system or construction-documentation feature.

About this repository

This is Reelpen's public product and connection documentation. It does not contain the application source, private projects, account data or credentials. The hosted connection guide is the current setup reference.

Website · YouTube · X · Help

Product facts reviewed: 2026-09-28.

Source: README.md at commit 0f8ee0d

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v0.1.0LatestSep 29, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.