Tools

Seven tools covering the full display pipeline — from quick styled text to full layered scene composition, device control, and initial setup:

pixoo_display_text

The primary tool for text-only display. Covers the 80% case — styled text with quality defaults.

• Named scene themes set background gradient and text palette in one parameter (midnight, ember, claude, ice, neon, forest, mono)
• Style block: gradient palette ramps (ember, ice, neon, fire, lavender, claude, mono), drop shadow, 1px outline for legibility, integer scale multiplier for block-letter weight
• Semantic positioning: x: "center", y: "bottom" — no manual pixel math
• Auto-fit overflow: tries 5×7 → 3×5 → scroll; every fit decision reported in layout[]
• Returns the rendered frame as an image content block so you see it immediately
• Optional brightness convenience parameter applied before push

pixoo_compose_scene

Full scene composition with the complete element vocabulary.

• Layered elements rendered back-to-front: text, icon, rect, circle, line, progress, sparkline, bitmap, pixels, image, sprite
• Named icons from the built-in registry (weather, arrows, status, media) or custom SVG path
• Dashboard widgets: progress bar with gradient fill and optional label; sparkline mini chart (line or bar, auto-scaled)
• Animation: named effect presets (float, scroll-left, scroll-right, pulse, blink, twinkle, drift, fade-in, fade-out) or raw keyframe arrays — 1–40 frames, configurable speed
• Per-element opacity and visible flag; images at https URLs fetched server-side to a temp file
• Returns a preview image (static: PNG; animated: labeled contact-sheet PNG + GIF saved to disk)

pixoo_push_image

Push any image to the display with control over the downsampling.

• Accepts absolute local paths and https URLs
• Three fit modes: contain (letterbox), cover (crop to fill), fill (stretch)
• Three resize kernels: nearest for pixel art, lanczos3 for photos, mitchell for a balance
• Returns the exact 64×64 result as an image block — you see what the display received

pixoo_overlay_text

Device-native scrolling text overlay — persists across channel switches.

• 115 device-rendered font IDs (0–114)
• Up to 20 independent overlay slots (IDs 0–19)
• Configurable scroll direction, speed, and alignment
• Clears with mode: "clear" — overlays survive channel changes until explicitly removed
• Not previewable (device-rendered); for styled previewable text use pixoo_display_text

pixoo_design_brief

The orientation tool. Run before authoring any scene to get grounded in 64px craft constraints.

• Six topics: text, scene, dashboard, animation, pixel-art, troubleshooting
• Returns legibility floors, palette discipline, layout zones, animation budgets, and common pitfalls
• Merges live device state (reachable, channel, brightness, screen) into the response
• Pre-filled nextToolSuggestions with ready-to-use arguments based on current device state

Resources

All resource data is also reachable via tools. pixoo_design_brief surfaces the design guide content per topic; pixoo_control_device returns live device state equivalent to pixoo://device/status.

Features

Built on @cyanheads/mcp-ts-core:

• Declarative tool and resource definitions — single file per primitive, framework handles registration and validation
• Unified error handling — handlers throw, framework catches, classifies, and formats
• Pluggable auth: none, jwt, oauth
• Swappable storage backends: in-memory, filesystem, Supabase, Cloudflare KV/R2/D1
• Structured logging with optional OpenTelemetry tracing
• STDIO and Streamable HTTP transports, serving MCP protocol revision 2026-07-28 alongside the 2025 revisions

Pixoo-specific:

• Requires a Divoom Pixoo LED matrix display on the local network; primary target is the Pixoo-64 (16 and 32 also supported)
• All composition happens in an RGBA canvas pipeline on the host (@cyanheads/pixoo-toolkit) — the device receives final RGB frames, never raw drawing commands
• Styled text engine: gradient palette ramps, drop shadows, outlines, integer scale, semantic alignment — no manual pixel math or bitmap letterforms required
• Push pacing: device commands serialized with a configurable minimum inter-push interval (default 1000ms) to prevent device freezes
• Every PixooResult checked — pushed: true means the device acknowledged with error_code: 0, never "I tried"
• Animation capped at 40 frames (device instability beyond this); contact-sheet PNG preview for animations (GIF inconsistent across MCP clients)
• Local transports only — sharp image processing doesn't run on Cloudflare Workers

Agent-friendly output:

• Preview-as-content: render tools return the upscaled (8×, 512px) output as an image content block — the calling model sees exactly what was drawn, before and after push
• Layout transparency: every silent renderer decision (font fallback, truncation, scroll engaged, element clipped) reported in layout[] so agents can inspect and refine
• Device truth: pushed reflects the device ACK; deviceState post-push flags visibility issues (screen off, brightness ≤ 10, wrong channel) as enrichment notices rather than failures
• Graceful degradation: render succeeds and returns the preview even when the device is unreachable — the agent keeps its work

Getting started

Requirements: A Divoom Pixoo display (Pixoo-64, Pixoo-32, or Pixoo-16) on the same local network as the server. Run pixoo_discover_devices to find its IP, then set PIXOO_IP in your server configuration.

Add the following to your MCP client configuration file: