Mycelium Emissions Database

global.myceliumPublished by mycelium.globalOfficial publisherv1.0.0Updated Oct 24, 2026

Search company carbon emissions: scope 1, 2 and 3 figures, Mycelium Scores and rankings.

VerifiedStreamable HTTPWeb executableFinanceData & Analytics

Overview

AI-generated overview

A hosted MCP server that lets an assistant search companies and read their carbon emissions figures, Mycelium Scores and rankings.

What you can do
Search companies in the emissions database by name, with optional country and result-limit filters, returning scores and slugs for other tools. Read a company's public profile: identity and registration, Mycelium Score with industry rank, Transparency Score and per-year emissions totals. Retrieve full per-scope greenhouse gas figures for a reporting year, split into Scope 1, 2 and 3 categories and tagged as reported or estimated.
When to use it
Useful when you need quick, sourced answers about a company's carbon footprint, scope-level emissions, or how it ranks against its industry, without building your own data pipeline.
Requirements
A remote streamable HTTP endpoint; no package or local runtime. No authentication, API key or environment variables are declared; access is anonymous with a per-IP rate limit. Network access to the provider's endpoint is required.
Before you install
Read-only lookups, but figures mix company-reported data with Mycelium's own modelled estimates; the README asks clients to keep that distinction and never present an estimate as the company's disclosure. Anonymous access is rate-limited per IP, so heavy use may be throttled.

Installation

In SourceWeft

  1. Open Mycelium Emissions Database in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/global.mycelium%2Femissions-database/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "mycelium-emissions-database": {
      "type": "http",
      "url": "https://mycelium.global/mcp/server"
    }
  }
}

README

Mycelium Emissions Database MCP Server

A hosted Model Context Protocol server that gives AI assistants direct access to the Mycelium open corporate carbon emissions database: company search, Mycelium Scores, and full per-scope greenhouse gas figures.

Setup

Claude (claude.ai, Claude Desktop)

Settings → Connectors → Add custom connector → paste https://mycelium.global/mcp/server.

Claude Code

bash
claude mcp add --transport http mycelium https://mycelium.global/mcp/server

Cursor / generic MCP client

json
{  "mcpServers": {    "mycelium": {      "url": "https://mycelium.global/mcp/server"    }  }}

Tools

search-entities

Search the emissions database for companies by name. Returns matching companies with their Mycelium Score and the slug handle used by the other tools.

InputTypeDescription
querystring (required)Company name or name fragment
countrystringOptional ISO 3166-1 alpha-3 filter, e.g. GBR, DEU
limitintegerMax matches to return, 1-25, default 10

get-entity-profile

A company's public Mycelium profile: identity and registration, Mycelium Score (0 to 10) with industry rank, Transparency Score, and a per-year summary of total emissions in tonnes CO2e split into reported and estimated.

InputTypeDescription
entitystring (required)Slug from search-entities, or Mycelium public id GUID

get-emission-figures

Full greenhouse gas figures for one reporting year in the OpenCCF data model: per-scope lines (Scope 1, 2 and 3 with categories) in kgCO2e, each tagged as reported by the company or estimated by Mycelium.

InputTypeDescription
entitystring (required)Slug from search-entities, or Mycelium public id GUID
yearintegerReporting year, e.g. 2023. Defaults to the latest on file

Provenance

Every emissions line is tagged as reported by the company or estimated by Mycelium. Clients should preserve that distinction and never present an estimate as a company's own disclosure.

About the data

Mycelium is an open corporate carbon disclosure platform covering hundreds of thousands of entities, built from company reporting, registry data (GLEIF, Companies House and others) and modelled estimates. The same data is available over REST: see the Mycelium Network API.

License

Documentation in this repository is MIT licensed (see LICENSE). Use of the hosted service is governed by the terms at https://mycelium.global.

Source: README.md at commit ec67876

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

85% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts