rive-mcp

Create, edit, inspect, render and live-preview Rive (.riv) animations from Claude — no Rive editor and no subscription. The server runs on your machine; the few outside calls are listed under Network access.

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rive-mcp is a free MCP (Model Context Protocol) server that gives Claude (or any MCP client) full control over .riv files. Unlike the official Rive MCP (which requires the editor running) or paid third-party servers, it works with nothing but a .riv file — and it can even build .riv files from scratch by serializing the binary format directly.

Rendering runs the official Rive runtime (@rive-app/canvas-advanced WASM) inside headless Chromium, so previews follow the runtime’s output, except for the Canvas2D differences listed under Limitations.

This animation was generated entirely by riv_create — no Rive editor involved.

Highlights

• Generate .riv from JSON — shapes, gradients, embedded PNGs, text (including text on path), bones + skinning, IK, mesh deformation, keyframe animation with easing, multi-layer state machines, listeners, events, physics baking, particles, embedded audio (WAV/MP3/FLAC) fired from the timeline or a state machine
• Pro-quality by construction — 28 semantic motion presets (pop-in, staggered rise-in, breathing, stagger-in, parallax-drift, shimmer, …) with professionally tuned amplitudes/easings, an OKLCH design-token generator (riv_design_tokens), motion-quality lint rules (robotic linear movement, teleports, missing stagger), and a one-call critique loop (riv_critique: frames + objective metrics + scoring checklist)