TrimCarbon is listed as active in the registry but did not answer our last check. It exposes 10 tools.
CO₂ estimates for general-aviation flying: by aircraft and hours, by fleet, or by fuel.
Uptime history
24 days of history · worst day 0%
24 days agonow
3.3%
Uptime 24h
3 of 92 checks
10
Tools
read from the server
427 ms
Response time
average over 24h
open, no key
Access
streamable-http
TrimCarbon does not always answer
Over the last week it answered 5.9% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.
run in your terminal
claude mcp add flight-emissions --transport http https://mcp.trimcarbon.com/mcpSettings → Connectors → Add custom connector, then paste this address
https://mcp.trimcarbon.com/mcp~/.codex/config.toml
[mcp_servers.flight-emissions]
url = "https://mcp.trimcarbon.com/mcp".cursor/mcp.json
{
"mcpServers": {
"flight-emissions": {
"url": "https://mcp.trimcarbon.com/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"flight-emissions": {
"type": "http",
"url": "https://mcp.trimcarbon.com/mcp"
}
}
}Available tools 10
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
estimate
estimate_flight_hours
Estimates the CO₂ from flying hours in one or more aircraft types: one row for a pilot, several rows for a fleet (a school, club or operator). CO₂ = hours × the type’s kg of CO₂ per flight hour, from its fuel flow at about 75% power. Types match by name, ICAO type designator or page slug.
estimate_fuel_burn
Estimates the CO₂ from burning an amount of aviation fuel: avgas 100LL, mogas (motor gasoline) or Jet A, in US gallons, liters or kg. Uses the US EPA factor per US gallon and the fuel’s density for liters and kg.
account
get_my_account
Shows the signed-in TrimCarbon account: email, current offset plan (monthly or yearly, kg of CO₂ per period, renewal date) and offset API access. Needs the user to connect their TrimCarbon account.
aircraft
search_aircraft
Finds the aircraft types TrimCarbon has figures for, by name (e.g. "Cessna 172", "Skyhawk"), ICAO type designator (e.g. "C172", "PA28") or page slug. Returns each type with its kg of CO₂ per flight hour. The list covers about 60 general-aviation types, plus a few airliners (per passenger) and business jets.
api
get_api_impact
For a company that uses the TrimCarbon offset API: how much CO₂ it has offset through the API, in total, in the last 30 days and by month, and its API access status. Needs the user to connect their TrimCarbon account.
certificate
get_certificate
Shows one of the signed-in user’s TrimCarbon certificates: kg of CO₂, holder, dates, projects with their registries and retirement serial numbers, and links to the public certificate and its PDF. Takes the certificate number (TC-7K2M-9QXF-4HJD) that list_my_offsets returns. Needs the user to connect their TrimCarbon account.
impact
get_my_impact
Shows how much CO₂ the signed-in user has offset with TrimCarbon: the total, what is still being processed, by source (one-time, subscription, offset API), by year, and the projects funded. Needs the user to connect their TrimCarbon account.
import
import_logbook
Opens a card where the user picks a logbook export from ForeFlight, Garmin Pilot or LogTen. The card reads the file on the user’s device, uploads nothing, and shows the flight hours and CO₂ by aircraft type. The user can then share those totals with this conversation. Use it when someone wants the CO₂ of their flying from their logbook.
offsets
list_my_offsets
Lists the signed-in user’s TrimCarbon offset orders, newest first: date, source, kg of CO₂, status and the public certificate link once issued. Needs the user to connect their TrimCarbon account.
quote
quote_offset
Returns what TrimCarbon charges to offset an amount of CO₂: a one-time purchase in whole tonnes, and for yearly amounts the monthly and yearly plans. Each option has a link to continue on trimcarbon.com, where the user signs up and pays. This tool does not buy anything. It is for when the user asks what offsetting costs.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://mcp.trimcarbon.com/mcp | streamable-http | answering | 109 ms | 6 min ago |
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TrimCarbon — questions
Answers built from our own checks of this server.
What can TrimCarbon do?
It exposes 10 tools, read directly from the server on our last check. Among them: estimate_flight_hours, estimate_fuel_burn, get_api_impact, get_certificate, get_my_account, get_my_impact and 4 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is TrimCarbon working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 3 of 92 checks got a reply (3.3%), average response time 427 ms. The bar chart above shows every period we have measured.
The registry lists TrimCarbon as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect TrimCarbon?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does TrimCarbon need an API key?
No. TrimCarbon completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 10 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is TrimCarbon?
It answers our handshake in 427 ms on average, which is faster than 29% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.