FACTORY I/O · JSON Structure

Factory I O Tag Structure

Represents a tag in the Factory I/O simulation scene. Tags correspond to I/O signals mapped to PLC addresses.

Type: Properties: 0
Industrial AutomationSimulationsSoftware Simulation

Tag is a JSON Structure definition published by FACTORY I/O.

Meta-schema:

JSON Structure

Raw ↑
{
  "name": "Tag",
  "description": "Represents a tag in the Factory I/O simulation scene. Tags correspond to I/O signals mapped to PLC addresses.",
  "fields": [
    {
      "name": "name",
      "type": "string",
      "description": "Human-readable name of the tag as defined in the Factory I/O scene."
    },
    {
      "name": "id",
      "type": "string (uuid)",
      "description": "Globally unique identifier for the tag. Stable across sessions."
    },
    {
      "name": "address",
      "type": "integer",
      "description": "PLC address mapped to this tag."
    },
    {
      "name": "type",
      "type": "enum: Bit | Int | Float",
      "description": "Data type of the tag value. Determines valid value range and encoding."
    },
    {
      "name": "kind",
      "type": "enum: Input | Output",
      "description": "Direction of the tag from the controller perspective. Input = sensor data read by controller; Output = actuator command written by controller."
    },
    {
      "name": "value",
      "type": "boolean | number",
      "description": "Current live value of the tag in the simulation."
    },
    {
      "name": "openCircuit",
      "type": "boolean",
      "description": "True if the tag has an always-off (open circuit) fault injected."
    },
    {
      "name": "shortCircuit",
      "type": "boolean",
      "description": "True if the tag has an always-on (short circuit) fault injected."
    },
    {
      "name": "isForced",
      "type": "boolean",
      "description": "True if the tag value is currently overridden by a forced value."
    },
    {
      "name": "forcedValue",
      "type": "boolean | number",
      "description": "The value the tag is held at when isForced is true."
    }
  ]
}

Work with this as data

Every JSON Structure here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for json structure

4 MCP tools reach this
  • find_json_structuresBrowse and filter every JSON Structure in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This JSON Structure
curl "https://apis.io/api/v1/json-structures/factory-i-o-tag-structure"
All json structure
curl "https://apis.io/api/v1/json-structures?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.