API & MCP

Everything a person can do on Ohmforge Serial Log to Capture, a program or AI agent can do with the same inputs and get the identical result.

HTTP API

POST https://ohmforgeseriallogtocapture.usefulweb.app/api/v1/calculate – run Ohmforge Serial Log to Capture
GET https://ohmforgeseriallogtocapture.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.

Ohmforge Serial Log to Capture

Turns a saved serial monitor log into a waveform capture and measures it like an oscilloscope recording. Lines with numbers ("512", "1.5 2.0", "temp:21.5 hum:40") become channels, text lines are skipped. Time comes from the log's time stamps (Arduino IDE, Ohmforge Serial monitor, Tera Term style), from a time column the device prints (millis()) or from a fixed sample rate. You get Vpp, mean, RMS, frequency, duty cycle and rise time per channel, a chart and a CSV that opens in the Capture analyzer.

Inputs of Ohmforge Serial Log to Capture
Field	Type	Default	Description
`file`	file	—	Log file. A text log saved by a serial monitor; up to 10 MB and 200 000 lines. Processed in memory and not kept.
`log`	textarea	—	Or paste the log. Used when no file is uploaded.
`timeBase`	select (auto, received, column, rate)	"auto"	Time base
`sampleRate`	number	—	Sample rate (lines per second, for a fixed sample rate)
`columnUnit`	select (ms, us, s)	"ms"	Unit of the device time column
`series`	text	—	Series to use (optional). Comma-separated names ("Value 1" for unlabelled numbers); empty = the first four.
`unit`	text	—	Unit of the values (optional). Shown with the measurements, e.g. V, A or °C; empty = plain numbers.
`hysteresis`	number	10	Crossing hysteresis. Noise smaller than this band does not count as a crossing.

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://ohmforgeseriallogtocapture.usefulweb.app/mcp – protocol revisions 2026-07-28 (stateless) and 2025-11-25 / 2025-06-18 / 2025-03-26 (initialize handshake).
Tools: ohmforge_serial_log_to_capture
Local stdio connector: node src/mcp-stdio.ts --tool=ohmforge-serial-log-to-capture

{
  "mcpServers": {
    "ohmforge-serial-log-to-capture": { "type": "http", "url": "https://ohmforgeseriallogtocapture.usefulweb.app/mcp" }
  }
}