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fyi.carbon/carbon-fyi

by carbon.fyi · remote · no sign-in to list tools · v0.1.0 · published by fyi.carbon

Voluntary carbon market news and open carbon price data. Read-only, keyless.

Read only
CompareRegistry entry

6 tools: 6 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http carbon-fyi https://www.carbon.fyi/api/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

6 tools

Only reads 6Claude Code: allow
  • get_carbon_pricesCurrent voluntary carbon credit prices from two independent sources: per-category minimum/median price and available supply across the Carbonmark marketplace catalog, and spot pric…No findings

    Why it is in this group

    • The name "get_carbon_prices" says "get": a word for reading.
    Description, as the server wrote it
    Current voluntary carbon credit prices from two independent sources: per-category minimum/median price and available supply across the Carbonmark marketplace catalog, and spot prices per Klima Protocol carbon class. The two are NOT comparable — read the `caveats` field on each before using either number.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • get_market_summaryOne call for orientation: how much of the archive is available, when it last updated, the story-tag breakdown (use these as `tag` values for search_news), and the current price tab…No findings

    Why it is in this group

    • The name "get_market_summary" says "get": a word for reading.
    Description, as the server wrote it
    One call for orientation: how much of the archive is available, when it last updated, the story-tag breakdown (use these as `tag` values for search_news), and the current price table. Start here.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • get_price_historyDaily-averaged historical price series.No findings

    Why it is in this group

    • The name "get_price_history" says "get": a word for reading.
    Description, as the server wrote it
    Daily-averaged historical price series. This archive exists only because carbon.fyi records it three times a day: no upstream API serves a historical carbon price series, so these observations cannot be obtained anywhere else and cannot be re-derived. Check `seriesStartsAt` in the response — the archive began on 2026-08-27, so early windows are necessarily short.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • get_storyFetch a single story by its id, including every source that reported it.No findings

    Why it is in this group

    • The name "get_story" says "get": a word for reading.
    Description, as the server wrote it
    Fetch a single story by its id, including every source that reported it. Story ids are permanent — a published story keeps its id and its public URL indefinitely — so they are safe to store.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • list_sourcesThe publications, registries and integrity bodies carbon.fyi monitors.No findings

    Why it is in this group

    • The name "list_sources" says "list": a word for reading.
    Description, as the server wrote it
    The publications, registries and integrity bodies carbon.fyi monitors. Useful for judging coverage — a topic absent from the archive may simply not be covered by these sources.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • search_newsSearch carbon.fyi's curated voluntary carbon market story archive.No findings

    Why it is in this group

    • The name "search_news" says "search": a word for reading.
    Description, as the server wrote it
    Search carbon.fyi's curated voluntary carbon market story archive. Each story is an editorially clustered summary of one development, written from one or more original reports, and always carries the original source name and URL. Supply at least one filter; results are newest-first. Use `get_market_summary` first if you do not know what tags or date range to ask for.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http carbon-fyi https://www.carbon.fyi/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__carbon-fyi__search_news",
      "mcp__carbon-fyi__get_story",
      "mcp__carbon-fyi__get_carbon_prices",
      "mcp__carbon-fyi__get_price_history",
      "mcp__carbon-fyi__get_market_summary",
      "mcp__carbon-fyi__list_sources"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as carbon-fyi. Review it before you use it.