# Mycelium Emissions Database

An MCP server that lets your assistant look up company carbon emissions: search, Mycelium Scores and per-scope figures. Handy when climate data has to land in the answer.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI
- Author: MyceliumNetwork
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/MyceliumNetwork/mcp-server
- Updated: 2026-09-03
- HTML: https://affpapa.org/en/nevibecode/mcp/mycelium-emissions-database

## What it does

The server is hosted at `https://mycelium.global/mcp/server` over streamable HTTP. There is no auth — access is anonymous with a per-IP rate limit, so pasting the URL into any MCP client is enough. No key, no signup.

Three tools come with it. `search-entities` matches companies by name, takes an optional ISO 3166-1 alpha-3 country filter, and hands back the slug the other tools expect. `get-entity-profile` returns registration details, a Mycelium Score from 0 to 10 with industry rank, a Transparency Score, and a year-by-year emissions summary in tonnes CO2e. `get-emission-figures` opens up one reporting year in the OpenCCF model, line by line per scope in kgCO2e.

Every line carries a reported or estimated tag. Keep that tag intact when you have the agent write something up. An estimate from Mycelium is not the company's own disclosure, and mixing the two is the failure mode here. Leave the year out and you get the latest one on file.

## Requirements
- Remote server: `https://mycelium.global/mcp/server`

## Install

### Claude Code (native platform)

**Platform CLI: remote server**
```bash
claude mcp add --transport http emissions-database https://mycelium.global/mcp/server
```

### Codex

**Platform CLI: remote server**
```bash
codex mcp add mycelium-emissions-database --url https://mycelium.global/mcp/server
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "mycelium-emissions-database": {
            "url": "https://mycelium.global/mcp/server"
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "mycelium-emissions-database": {
            "type": "http",
            "url": "https://mycelium.global/mcp/server"
        }
    }
}
```

### Gemini CLI

**Platform CLI: remote server**
```bash
gemini mcp add -t http mycelium-emissions-database https://mycelium.global/mcp/server
```

## When to use it
- look up a company in the emissions database by name
- narrow results to one country
- read a Mycelium Score and industry rank
- pull Scope 1, 2 and 3 figures for a given year
- tell a company's own disclosure apart from a modelled estimate

## Example prompts
- Search the Mycelium database for `Siemens` and give me its slug
- Show that company's profile: Mycelium Score, Transparency Score and emissions by year
- Get the Scope 1, 2 and 3 figures for 2023 and mark which are reported and which are estimated

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