Posecode MCP server

Posecode

Kinematic motion as text. An inspectable, editable movement format for animation tools, LLMs, and web products.

Like Mermaid for movement: small text documents for describing, validating, and rendering deterministic human motion without hiding the source inside a black box.

Live Playground · Movement Library · Language Specification · Examples · MCP Server

Why Posecode?

Animation clips and generated trajectories can show movement, but they often hide the semantic decisions that produced it.

Posecode keeps those decisions in readable source. A human can write the document, an animation tool can emit it, or an LLM can draft it. Parsing, validation, editing, and rendering do not require an AI model.

One .posecode document — shoulders: abduct 160, hips: abduct 30, repeat 12 — rendered live in the browser.

For example:

Bend your knees, move your hips backward, and keep your chest upright.

A human may understand that instruction, but a renderer cannot reliably determine:

• which joints should move,
• by how many degrees,
• in which coordinate frame,
• over what duration,
• in what sequence,
• or within which physical limits.

Humans, tools, and language models all need a shared syntax for expressing movement in a renderable and testable form.

Posecode provides that missing representation.

See Posecode in 28 seconds

From readable movement source to validated 3D rendering, MCP tools, and a one-script web embed.

▶ Watch the 28-second builder demo Plain text in. Smooth, programmable 3D motion out.

Movement examples

pelvis: hinge — deadlift knees: flex 95 — squat shoulders: abduct 90 — lateral raise

Shortened. The full README is on GitHub.