API & MCP

Everything a person can do on Membrane Sound Lab, a program or AI agent can do with the same inputs and get the identical result.

HTTP API

POST https://tonegridmembranelab.usefulweb.app/api/v1/calculate – run Membrane Sound Lab
GET https://tonegridmembranelab.usefulweb.app/api/v1/tool – inputs, output schema, examples
OpenAPI 3.1: /openapi.json · /openapi.yaml
Errors: application/problem+json; 422 includes per-field errors.

Membrane Sound Lab

Explore a rectangular membrane with spatial mode plots, interactive strike positions and configurable synthesized WAV samples.

Inputs of Membrane Sound Lab
Field	Type	Default	Description
`width`	number	1	Relative width
`height`	number	1.4	Relative height
`strikeX`	number	0.35	Strike X (0–1)
`strikeY`	number	0.4	Strike Y (0–1)
`pitch`	number	130	Fundamental frequency (Hz)
`seconds`	number	2	Sample duration (seconds)
`decay`	number	2	Decay rate

Example request

Try an example

curl -X POST https://tonegridmembranelab.usefulweb.app/api/v1/calculate -H 'content-type: application/json' -d '{}'

Every result contains

inputs (normalised, defaults applied), summary, result (validated against the published schema), units, assumptions, sources, warnings, computedAt and links.

MCP (Model Context Protocol)

Streamable HTTP endpoint: https://tonegridmembranelab.usefulweb.app/mcp – protocol revisions 2026-07-28 (stateless) and 2025-11-25 / 2025-06-18 / 2025-03-26 (initialize handshake).
Tools: tonegrid_membrane_lab
Local stdio connector: node src/mcp-stdio.ts --tool=tonegrid-membrane-lab

{
  "mcpServers": {
    "tonegrid-membrane-lab": { "type": "http", "url": "https://tonegridmembranelab.usefulweb.app/mcp" }
  }
}