Let AI look up Taiwan's official emission factors

What problem this solves

Asked for an emission factor, an AI often gives a number from memory: the wrong year, the wrong unit, or simply invented, with no source you can check.

Taiwan's emission factors are spread across the Energy Administration, the Ministry of Environment and the water utilities, in PDF, ODS and CSV, and the same term can mean a different boundary or unit from one source to the next.

This service organizes those official public data so an AI can query them. Every factor it returns carries the publishing organization, applicable year, unit and source URL; every calculation carries its formula and the factor version. If a factor is not found, it says so instead of substituting a nearby number.

Which emission factors are covered

• ElectricityFactors from the Energy Administration, Ministry of Economic Affairs, for 2005 to 2025. From the 2025 factor year there are three values by usage: 0.466 for industry inventory, 0.471 for non-commercial lighting and flat-rate lighting customers, and 0.467 for the public utility average (kgCO2e/kWh).
• Tap waterTaiwan Water Corporation, 2007 to 2025, expressed in CO2; Taipei Water Department, 2018 to 2025, expressed in CO2e. The service areas and boundaries differ, so the two must not be mixed or added.
• Fuel combustionGreenhouse gas emission factors announced by the Ministry of Environment on 5 February 2024 (ROC year 113), in kg/TJ and split by gas (CO2, CH4, N2O). There is no official per-litre factor, so you must supply the fuel's lower heating value. Only common fuels are imported so far.
• Product carbon footprintThe Ministry of Environment's carbon footprint factor dataset (CFP_P_02), over a thousand records, synced by API. These are product life-cycle footprints and must not be used directly for an organisational GHG inventory. Factors declared per item (pack, bottle, sheet) and same-name records the official data does not tell apart are lookup-only, not calculable.

This is what is actually imported today. For anything outside it, the service answers that nothing was found rather than guessing.

What you can ask the AI

Once connected, just ask in plain language. Each prompt can be copied:

• What is Taiwan's electricity emission factor per kWh for 2025?

• Calculate the emissions of an office that uses 12,000 kWh of electricity a year.

• Has the Taiwan government published an emission factor for diesel?

• Look up the carbon footprint factor for plastic raw material.

• Compare Taiwan's electricity emission factors across different years.

• What are the source and scope of application of this emission factor?

Connect MCP in a minute

Using Claude on the web or desktop as the example. No coding and no API key.

1. Open Settings and go to Connectors.
2. Choose "Add custom connector", enter https://carbon.taux.io/mcp as the URL, and leave authentication off.
3. Back in a conversation, switch the connector on from the connector menu, then try any prompt above.

https://carbon.taux.io/mcp

With Claude Code, run this in a terminal:

claude mcp add --transport http carbon https://carbon.taux.io/mcp

To confirm it works, look for a tool call in the answer, with the source and applicable year shown. A bare number with no tool call means the connector is not switched on.

Supported AI clients

One endpoint for every client that supports remote MCP (Streamable HTTP); no authentication. Claude and Claude Code are covered in the previous section.

https://carbon.taux.io/mcp

{
  "mcpServers": {
    "carbon": {
      "url": "https://carbon.taux.io/mcp"
    }
  }
}

[mcp_servers.carbon]
url = "https://carbon.taux.io/mcp"

{
  "servers": {
    "carbon": {
      "type": "http",
      "url": "https://carbon.taux.io/mcp"
    }
  }
}

code --add-mcp '{"name":"carbon","type":"http","url":"https://carbon.taux.io/mcp"}'

gemini mcp add --transport http carbon https://carbon.taux.io/mcp

https://carbon.taux.io/mcp

npx -y mcp-remote https://carbon.taux.io/mcp

MCP tools

Generated from the tools the server actually registers.

See every tool's parameters

Official data sources

Every factor comes from the official data below. This service organizes and calculates; it does not alter official values.

Data update status

Sync status is live and is not written on this static page. Query /api/v1/status, or ask the AI to call the check_factor_updates tool.

How each source is updated: electricity, water and fuel combustion data exist only as PDF, ODS or CSV files, so a person checks the values and imports them, and they reach the database only after review in version control. CFP_P_02 from the Ministry of Environment is synced through its API, which needs an API key; until a key is configured it holds no data.

Older factor versions are kept, so a past calculation can be reproduced by naming the version.

FAQ

Technical notes and disclaimer

This service is provided by taux.io. It is unofficial, not affiliated with or endorsed by any government agency.

It offers no certification, third-party verification or guarantee of legal compliance. Results are for reference; check the original official announcements before any formal use.

Keep three kinds of data apart:

• Government source data: The original values and units as published by the agency. This service does not change them.
• Data curated by this service: Aliases, categories, usage limits and notes written by this service; not official text.
• Results calculated by this service: Activity data multiplied by a factor, computed by this service's code; not an official figure.

Licence and attribution

資料來源：經濟部能源署、環境部、台灣自來水公司、臺北自來水事業處等機關公開資料。標示政府資料開放授權條款－第1版者，依該條款（https://data.gov.tw/license）授權利用；本服務為非官方整理。

政府資料開放授權條款－第1版: https://data.gov.tw/license

Related links

• MCP tool reference
• REST API docs
• llms.txt
• llms-full.txt
• Source code on GitHub