Janction Render MCP server

JANCTION Render

A cloud GPU render farm for Blender, built for AI agents. Render Blender scenes on JANCTION GPUs from Claude, ChatGPT, Claude Code, Codex, Cursor or any MCP client: an MCP server (remote and stdio) plus a CLI. Use it to render Blender without a GPU, or when rendering locally is slow.

needed), or a 3D file (glTF/GLB, FBX, USD, OBJ, STL, PLY, Alembic) that is imported into an empty scene.

• Input: a .blend file (textures travel with it), a bpy Python script that builds the scene (no local Blender

environment="compare" previews the same frame under all four presets in one labelled image, so the agent can pick one.

• environment="studio" | "sunset" | "overcast" | "night" lights a scene with a bundled HDRI (CC0) for a good first render;

a preview shows 0/90/180/270 degrees, a final render without frameend gives the whole turn as an MP4). Flat floors and walls are ignored when framing; orbittarget (object name or x,y,z) and orbit_distance (multiplier) adjust the shot.

• A .gltf or .obj brings its .bin / .mtl / textures along automatically (from the same folder or the same URL folder).
• orbit=True turns any scene or imported model into a turntable: an orbit camera circles it once (orbit_frames, default 24;

as an interactive panel in the chat: the image, a progress bar, "Open MP4", and preset buttons after an environment="compare" preview. Both the remote connector and the stdio package ship the panel (janctionrender/mcpapp.html); set JRMCPAPPS=0 to turn it off.

• While the GPU is lent to another workload, tools answer right away with the queued job and a note instead of waiting.
• While a job renders, render_status counts finished frames inside the running chunk, so the ETA updates every few seconds.
• In hosts that support MCP Apps (Claude web and desktop, among others), previews, progress and download links also appear

Paid plans (per GPU second, prepaid credit) will be announced on the service page before they start.

• scene_info reads the scene without rendering (cameras, frame range, missing files).
• render_preview returns 1-4 low-cost frames tiled in one image within seconds, so the agent can look, fix, and repeat.
• render_estimate says how long a render will take ("about 3 minutes") and whether it fits today's free quota.
• renderfinal renders the frames on GPUs and joins them into an MP4; renderstatus reports the remaining time.
• Free beta: no charges. Each key gets 10 GPU-minutes per day; a final render is up to 240 frames at 1080p.

• Inputs and results are deleted 24 hours after last use and are never used for training.

Status

Free beta. Service page: https://render.janction.jp (/v1/health, /llms.txt, /faq). Blender 5.0, Cycles on GPU (blender="5.2" selects Blender 5.2 when the worker has it; render_info lists what is available). Guides: render farm for agents · without a GPU · Claude · ChatGPT · Claude Code · Codex · bpy scripts · API · comparison · Blender add-on · Maya / Houdini / Cinema 4D · 日本語は /ja/

Connect (remote MCP, nothing to install)

Shortened. The full README is on GitHub.