GreenCycle Compound Atlas is answering right now. Last checked 12 min ago. It exposes 14 tools. Last commit 22 Oct 2026.
Read-only cannabis compound, receptor, anatomy and evidence data, every value sourced.
Uptime history
17 days of history
17 days agonow
100.0%
Uptime 24h
91 of 91 checks
14
Tools
read from the server
108 ms
Response time
average over 24h
0
Stars
last commit 22 Oct 2026
What changed 19
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 25 October 2026. No other catalogue keeps this.
30 Oct
14 tool descriptions were rewritten
ask_atlas, cite, compare_compounds and 11 more
30 Oct
3 tools changed the parameters they ask for
find_studies, list_trials, search
25 Oct
a tool appeared
ask_atlas
25 Oct
a tool changed version
Nothing serious here today
Today is the operative word: we check GreenCycle Compound Atlas every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.
run in your terminal
claude mcp add atlas --transport http https://greencyclepedia.com/mcpSettings → Connectors → Add custom connector, then paste this address
https://greencyclepedia.com/mcp~/.codex/config.toml
[mcp_servers.atlas]
url = "https://greencyclepedia.com/mcp".cursor/mcp.json
{
"mcpServers": {
"atlas": {
"url": "https://greencyclepedia.com/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"atlas": {
"type": "http",
"url": "https://greencyclepedia.com/mcp"
}
}
}Available tools 14
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
ask
ask_atlas
Use first for a plain question such as "does CBD help epilepsy", "where does THC act" or "what binds TRPV1": finds the compounds, conditions and receptors the question names in the atlas and answers only from those records: the evidence grade, the key findings with PubMed identifiers, the atlas pages, a not medical advice line and cite_as (title, url, licence, accessed date). When the question names nothing the atlas holds, it says so and suggests the closest names and tools. Educational reference, not medical advice. No doses. Example arguments: {"question":"does CBD help epilepsy"}.
changes
get_changes
The latest releases of the atlas data files: the version to cite, which datasets changed, records added and removed, and where the dated copy of each release lives. Example arguments: {"limit":3}.
cite
cite
A ready citation for one atlas record (compound, target or condition) or for the atlas as a whole: the canonical url, the citation line, a BibTeX entry, the version, the original papers to cite for its findings (PubMed links) and the licence (CC BY 4.0 with attribution). Example arguments: {"id":"compound:cbd"}.
compare
compare_compounds
Use for "THC versus CBD" and similar questions: two to four compounds side by side, target by target, with each action, evidence grade, measured binding values and PubMed identifiers, the targets they share and the atlas comparison page when one exists. Educational reference, not medical advice. Not a ranking of which is better for anyone. Example arguments: {"ids":["thc","cbd"]}.
compound
get_compound
Use for "what does THC, CBD or myrcene do in the body": the full record of one mapped compound by atlas id, Cannabis Compound Database id, name or PubChem CID. A curated record gives identity and structure identifiers, every target with the action, effect, evidence grade, body structures and PubMed identifiers, the measured binding values (pKi, pIC50, pEC50) from the IUPHAR/BPS Guide to PHARMACOLOGY, the cultivars a laboratory measured it in with their sources, an evidence summary, its cautions and a ready citation. A database compound gives its identity and every measured value at a placed target with its PubMed id or DOI. Educational reference, not medical advice. No doses. Example arguments: {"id":"cbd"}.
compounds
search_compounds
Use for lists of cannabis compounds: find the compounds mapped onto the human body (curated atlas records and database compounds with a measured, sourced value at a target placed in tissue) by name, chemical class, record type or molecular target (for example every compound acting at CB2, TRPV1, 5-HT1A or FAAH, or every terpene). Returns identity, PubChem CID, record type, targets and the atlas url. Use get_compound for one full record. Educational reference, not medical advice. Example arguments: {"target":"CB2","limit":10}.
conditions
search_conditions
Use for "does cannabis help with ...": conditions on the atlas evidence ladder (substantial, moderate, limited, insufficient, evidence of no benefit): the grade and why, the systematic reviews and trials behind it by PubMed identifier, the compounds and body structures involved and the atlas page. Trials are kept as administered in each trial; doses are left out on purpose. Educational reference, not medical advice. Not a diagnostic or dosing tool. Example arguments: {"query":"sleep"}.
cultivar
get_cultivar
Use for strain chemistry: one cultivar from the laboratory measurements the atlas uses (Cannabis Compound Database values, mg per gram of dry flower), by CCD id or name: every atlas compound measured in it with the mean, the number of values and the PubMed identifier of each source. Cultivar names are a poor guide to chemistry (PMID 35588111, PMID 39137353); never the community strain index. Educational reference, not medical advice. Example arguments: {"id":"STRAIN0001"}.
fetch
fetch
The full text of one atlas record by the id that search returned ("compound:cbd", "target:CB1", "condition:epilepsy", "trial:NCT03883360", "cultivar:STRAIN0001"): what it is, the targets and effects with evidence grades, measured binding values, cautions, every source (PubMed ids with links) and the citation line, with the atlas url. Educational reference, not medical advice. No doses. Example arguments: {"id":"compound:cbd"}.
search
search
Search the whole GreenCycle Compound Atlas by any name: cannabis compounds (THC, CBD, CBG, terpenes, flavonoids), receptors and enzymes (CB1, CB2, TRPV1, 5-HT1A, FAAH), medical conditions with an evidence grade (epilepsy, chronic pain, sleep) and registered clinical trials. Returns results with id, title and url; pass an id to fetch for the full sourced record. Educational reference, not medical advice. Example arguments: {"query":"cannabidiol"}.
structures
list_structures_for_target
Use for "where in the body": the atlas body structures (organs and regions) that carry a molecular target: for CB1 and CB2 the qualitative receptor density (0 to 4, a teaching summary of the literature, not a measurement), other receptors listed for a structure, and the structures where a compound effect at this target is mapped, with the compound and its evidence grade. Educational reference, not medical advice. Example arguments: {"target":"CB1"}.
studies
find_studies
Use for "what is the evidence" and "which studies": the PubMed studies the atlas cites for a compound, a target, a condition or a compound at one target, each with its PubMed link, what it supports (an effect at a target, a binding value, a caution, a systematic review or a trial as administered) and the atlas record it belongs to, plus the PubMed search behind each record. Doses are left out on purpose. Educational reference, not medical advice. Example arguments: {"compound":"cbd","condition":"epilepsy"}.
target
get_target
Use for receptor questions: one receptor, ion channel or enzyme by name or gene (for example CB1, CNR1, TRPV1, GPR55, FAAH, CYP3A4): what it is, where it sits in the body, the compounds mapped to it with their action, effect and evidence grade, and every measured binding or functional value with species and PubMed identifiers. Educational reference, not medical advice. Example arguments: {"id":"CB1"}.
trials
list_trials
Use for clinical trial questions: registered trials from the atlas snapshot of ClinicalTrials.gov (trials whose intervention is named cannabis, a cannabinoid, cannabidiol, THC or a related medicine): identifier, title, status, phase, enrolment, conditions, countries, start date, the atlas compounds involved and the registry link, newest snapshot first. Intervention names that state an amount are left out. Titles are third party text. Educational reference, not medical advice. Example arguments: {"query":"epilepsy","limit":5}.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://greencyclepedia.com/mcp | streamable-http | answering | 92 ms | 12 min ago |
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GreenCycle Compound Atlas — questions
Answers built from our own checks of this server.
What can GreenCycle Compound Atlas do?
It exposes 14 tools, read directly from the server on our last check. Among them: ask_atlas, cite, compare_compounds, fetch, find_studies, get_changes and 8 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 GreenCycle Compound Atlas working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 108 ms. The bar chart above shows every period we have measured.
How do I connect GreenCycle Compound Atlas?
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 GreenCycle Compound Atlas need an API key?
No. GreenCycle Compound Atlas completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 14 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is GreenCycle Compound Atlas?
It answers our handshake in 108 ms on average, which is faster than 91% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is GreenCycle Compound Atlas open source?
The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at greencyclepedia.com, which runs on its operator's own terms.