Rive MCP server

Read from the package source without running it. The installed server may list more.

• riv_ab_compare

  Render the same artboard/animation/state-machine from two .riv files under identical conditions and composite them side by side (horizontal or vertical) into a single GIF/APNG for human review — e.g. a rig before/after an edit, or two design variants. 'A: <file>' / 'B: <file>' labels are burned into each frame by default. If the two files' animation lengths differ, the shorter one holds on its fin

• riv_asset_search

  Search Iconify's ~200k professionally designed open-source icons and convert one directly into Rive shapes. Two modes: query-only returns matching icon names; icon+outSpec downloads the SVG and imports it (same output as riv_import_svg). Requires network access to api.iconify.design.

• riv_batch_render

  Render a list of jobs — each a single .riv (rivPath) or a glob of .riv files (glob) — to png/gif/apng/webm/sprites, sequentially reusing the same headless Chromium page (no parallel pages). Built for CI/scripts: call this tool repeatedly from your pipeline instead of expecting a live watch mode — none is provided, since MCP's request/response model doesn't fit a background file watcher. 'defaults'

• riv_createwrite action
• riv_critique
• riv_decompile

  Reverse a .riv file into a riv_create scene spec (shapes with bezier vertices, solid/gradient fills incl. gradient opacity, blend modes, artboard background, groups/solos, trim paths, clipping, animations with named easings, loop modes). Paint objects are resolved by parentId, so editor-authored files (paints deferred to the stream tail) decompile correctly. Use it to study professional files as f

• riv_design_tokens

  Deterministically generate professional design tokens for a scene BEFORE calling riv_create: an OKLCH-harmonized palette (with WCAG contrast ratios), gradient pairs, Material-Motion-derived durations & easing roles, spacing/radius/stroke scales and a type scale. Call this first, then use ONLY the returned values in the scene spec — never invent raw hex colors or ad-hoc durations. Inputs: optional

• riv_diff

  Structural diff between two .riv files: type count changes and per-object property differences.

• riv_dump

  Low-level dump of a .riv file's object stream (typeKeys, property values, hierarchy). Useful for debugging and format research. Large files return a summary unless full=true.

• riv_edit

  Modify an existing .riv (lossless roundtrip): set any property, change named text runs, delete objects (with automatic subtree + reference remapping), or edit keyframes on an existing animation (op=setKeyframes). Use riv_dump to find object indices/names. Renders a preview of the result.

• riv_extract_assets

  Extract embedded image/font/audio asset binary contents (ImageAsset/FontAsset/AudioAsset + FileAssetContents pairs) from a .riv file to disk, with the file extension inferred from magic bytes (PNG/JPEG/WEBP/TTF/OTF/WOFF/WOFF2/GIF). Externally-referenced (non-embedded) assets are skipped.

• riv_generate_code

  Generate ready-to-use integration code (React/Vue/Svelte/plain JS/Flutter) for a .riv file, using its real artboard, state machine and input names.

• riv_import_svg

  Convert an SVG file (Figma/Illustrator export, icon, illustration) into Rive bezier path shapes — the professional way to get high-quality artwork instead of drawing with primitives. Writes a scene-fragment JSON (shapes with full cubic vertices, gradients, strokes) and returns a rendered preview. Use the fragment in riv_create via "imports". Supports path/rect/circle/ellipse/polygon/polyline/line,

• riv_inspect

  Extract full metadata from a .riv file: artboards, animations (duration/fps/loop), state machines and their inputs (name/type/initial value). Uses the official Rive runtime. Also decodes Data Binding (ViewModel) structure when present — ViewModel definitions and their properties, ViewModelInstances with resolved property values (including enum/nested-viewmodel/list references), enums, converters,

• riv_lint

  Static diagnostic pass over a .riv file: broken/out-of-range references, oversized embedded assets, state-machine states unreachable by any transition, unconditional self-transitions (infinite-loop risk), unused state-machine inputs, keyframe easing silently discarded on a track's last keyframe, plus motion-quality rules (all-linear robotic movement, teleporting objects, missing stagger on simulta

• riv_list

  Recursively find .riv files under a directory and report size and format version for each.

• riv_lottie_import
• riv_optimize
• riv_play_state_machinewrite action

  Run a .riv state machine step by step: set/fire inputs, advance time, observe state transitions, and optionally capture frames. Returns a transition report.

• riv_render_apng

  Render a .riv animation (or state machine playback) to an animated PNG (APNG). Unlike GIF this supports 24-bit color plus full alpha transparency, and GitHub READMEs animate it like a regular image. Frames are rendered with a transparent background by default.

• riv_render_frame

  Render one frame of a .riv animation or state machine to PNG. Returns the image inline and saves it to disk.

• riv_render_gif

  Render a .riv animation (or state machine idle playback) to an animated GIF file for preview.

• riv_render_sprites

  Render N evenly-spaced frames of a .riv animation/state machine into a single grid sprite sheet PNG (columns = ceil(sqrt(N))). Writes the PNG plus a JSON metadata file (cellW/cellH/cols/rows/count/fps) alongside.

• riv_render_video

  Render a .riv animation (or state machine) to a real-time WebM video using canvas.captureStream() + MediaRecorder (VP9, falls back to VP8/generic webm). Default duration is one loop of the animation (2s for a bare state machine or when the animation's length can't be determined).

• riv_rig_character

  One call: character PNG -> fully rigged .riv with cutout parts (ears/tail via polygons), 2-bone head-tilt mesh (seamless), vector eyelid blink, idle + happy animations, and a state machine with a 'happy' trigger. Returns a preview. Fine-tune afterwards with riv_edit or riv_studio.

• riv_setup

  One-time setup: copies the bundled `rive-design-guidelines` skill (the mandatory tokens → pro-asset ingestion → presets → critique workflow, asset-source registry, icon-animation recipes and craft rules) into the client's skills directory so it auto-triggers on future Rive work — .claude/skills/ in the current project (scope=project, default) or ~/.claude/skills/ for all projects (scope=user). Ide

• riv_slice_image

  Cut polygon regions out of a character PNG for parts-based rigging (cutout animation). Writes each part as <name>.png plus base.png (source with parts erased) into outDir, and returns each part's bbox for placement. Use with riv_create: images per part + groups as pivots.

• riv_studio

  Start a local web UI (Rive-editor-like 3-pane layout) for live-previewing and editing a .riv file: hierarchy tree + click/drag selection on canvas + inspector (position/size/color/text edits apply live), timeline with keyframe markers, hot reload on file change, auto-generated state machine input controls, event log, and (with scenePath) direct scene-JSON editing. The UI also has an 'Instructions

• riv_studio_notes

  The Studio web UI's Agent panel is a two-way chat. Use this tool for both halves of it.

• riv_ui_detect
• riv_ui_prototype

  Take the elements from riv_ui_detect, assign each one a role, and get back a working .riv: every element becomes a shape or an image asset, each gets an entrance appropriate to its role, and buttons and cards get hover and press states. Roles:

• riv_visual_diff

  Render the same artboard/animation/time from two .riv files under identical conditions (forced to the same output size) and compute a thresholded per-pixel visual diff. Returns match rate, differing pixel count, and a diff visualization PNG (differing pixels in red, matching pixels dimmed).

• Code scan33 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitylocal package, no credentials required12/15
• Maintenancelast push 5 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Rive: common questions

Is Rive MCP server safe?

Yes, by our scan: it is graded A (92/100). Read the Rive safety report

How do I install Rive?

It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.

Does Rive need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Rive maintained?

The last commit was 6 days ago (2026-09-14). The latest release is v0.6.1.

What can I use instead of Rive?

Servers from other publishers that do the same job: Semiotic MCP server.