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GreenCycle Compound Atlas

REMOTE · GREENCYCLEPEDIA.COM

Read-only cannabis compound, receptor, anatomy and evidence data, every value sourced.

+3 this week 82 Trust /100

Last scanned (5 hours ago)

Scores higher than 85% of remote servers

Reachable. Last reached 5 Nov 2026.

Category Health and Science

Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security83
Transport & Reachability100
Schema Quality & AI Usability81
  • 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
  • AI-judged instruction clarity (excellent).Pass
  • Context-footprint check failed: tool/resource definitions use about 2844 tokens (~158/item across 18 items; 14 tools + 4 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management47
  • Stability observed for 14 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 100% of tool parameters carry a description.Pass
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • We read all 14 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 16 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a current MCP spec version (2026-07-28).Pass
Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 4 Nov 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

  • 2 Nov 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

  • 31 Oct 26 0
    • Tool “ask_atlas” rewrote its description, which is the text the model reads security
    • Tool “cite” rewrote its description, which is the text the model reads security
    • Tool “compare_compounds” rewrote its description, which is the text the model reads security
    • Tool “fetch” rewrote its description, which is the text the model reads security
    • Tool “find_studies” rewrote its description, which is the text the model reads security
    • Tool “get_changes” rewrote its description, which is the text the model reads security
    • Tool “get_compound” rewrote its description, which is the text the model reads security
    • Tool “get_cultivar” rewrote its description, which is the text the model reads security
    • Tool “get_target” rewrote its description, which is the text the model reads security
    • Tool “list_structures_for_target” rewrote its description, which is the text the model reads security
    • Tool “list_trials” rewrote its description, which is the text the model reads security
    • Tool “search” rewrote its description, which is the text the model reads security
    • Tool “search_compounds” rewrote its description, which is the text the model reads security
    • Tool “search_conditions” rewrote its description, which is the text the model reads security
    • Schema quality: 143 → 158 ▼ functional
    • “find_studies” added an optional parameter “query” cosmetic
    • “list_trials” added an optional parameter “condition” cosmetic
    • “search” added an optional parameter “limit” cosmetic
  • 30 Oct 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

  • 28 Oct 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

  • 26 Oct 26 +1
    • The server rewrote its instructions, which are the text every model session reads security
    • Schema quality: 2326 → 2577 ▼ functional
    • New prompt “compare_two_compounds” functional
    • New prompt “evidence_summary_for_condition” functional
    • New prompt “whats_new_this_week” functional
    • New prompt “where_a_compound_acts” functional
    • New resource “changes-this-week” functional
    • Server version: 1.1.1 → 1.2.0 functional
    • New tool “ask_atlas” functional
  • 24 Oct 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

  • 23 Oct 26 0
    • Stability: unverified → 0.03 ▲ functional
Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 5 Nov 2026 · Probed https://greencyclepedia.com/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=greencyclepedia.com CN=YE2,O=Let's Encrypt,C=US 14 Oct 2026 12 Jan 2027 ECDSA 256 ECDSA-SHA384 5d491437f74e844d36c6be3f7e955c7d718
SANs: *.greencyclepedia.com, greencyclepedia.com
CN=YE2,O=Let's Encrypt,C=US (CA) CN=Root YE,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 ECDSA 384 ECDSA-SHA384 4df3b15dd6c0784c507cd37b58e6f115
CN=Root YE,O=ISRG,C=US (CA) CN=ISRG Root X2,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 ECDSA-SHA384 872165fc34b6e5fba8add5b3705fb53a
CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 SHA256-RSA 6c8f1dc727c7117f7baf853ac980f9cd
CN=ISRG Root X1,O=Internet Security Research Group,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 4 Jun 2015 4 Jun 2035 RSA 4096 SHA256-RSA 8210cfb0d240e3594463e0bb63828b00

Background: What to check on a remote MCP endpoint →

DNSSEC secure

Validation of greencyclepedia.com. — Secure

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
com. present 19718 13 Verified
greencyclepedia.com. present 15987 13 Verified
greencyclepedia.com. Verified address RRset verified with the apex keys
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200
Header Value
strict-transport-security max-age=86400
content-security-policy default-src 'self'; script-src 'self' 'wasm-unsafe-eval' 'sha256-xWtmUPvg1/wYZs/ZavvoeZeskRBAEsAuFlYyjiAlhIw='; style-src 'self'; img-src 'self' data: blob:; font-src 'self'; connect-src 'self'; worker-src 'self' blob:; media-src 'self'; manifest-src 'self'; object-src 'none'; frame-src 'none'; base-uri 'none'; form-action 'none'; frame-ancestors 'none'; upgrade-insecure-requests
x-content-type-options nosniff
x-frame-options DENY
referrer-policy strict-origin-when-cross-origin
permissions-policy camera=(), microphone=(), geolocation=(), payment=(), usb=()

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://greencyclepedia.com/mcp Verified 200
http (plaintext) http://greencyclepedia.com/mcp HTTPS enforced 301 https://greencyclepedia.com/mcp
MCP tools · 14 exposed · ~2,311 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
ask_atlas ~161

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"}.

NameTypeReqDescription
questionstringyesA plain question that names a compound, a condition or a receptor, for example "does CBD help epilepsy".

No output schema declared.

No examples provided.

cite ~119

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"}.

NameTypeReqDescription
idstring–A record id or name, for example "compound:cbd", "CB1" or "epilepsy". Leave out to cite the atlas.

No output schema declared.

No examples provided.

compare_compounds ~116

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"]}.

NameTypeReqDescription
idsarrayyesTwo to four compound ids or names, for example ["thc", "cbd"].

No output schema declared.

No examples provided.

fetch ~133

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"}.

NameTypeReqDescription
idstringyesA record id from search, for example "compound:cbd".

No output schema declared.

No examples provided.

find_studies ~230

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"}.

NameTypeReqDescription
compoundstring–A compound id or name, for example "cbd".
conditionstring–A condition, for example "epilepsy".
limitinteger–How many items to return, at most 50.
querystring–Or a plain phrase, for example "cbd epilepsy" or "studies on CB1": the compound, target and condition it names are used.
targetstring–A target, for example "TRPV1".

No output schema declared.

No examples provided.

get_changes ~66

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}.

NameTypeReqDescription
limitinteger–How many items to return, at most 20.

No output schema declared.

No examples provided.

get_compound ~222

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"}.

NameTypeReqDescription
idstringyesAtlas id ("thc", "bcp"), database id ("CDB000032"), name ("Beta-caryophyllene", "Thymol") or PubChem CID (16078 or "CID 16078").

No output schema declared.

No examples provided.

get_cultivar ~138

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"}.

NameTypeReqDescription
idstringyesCCD cultivar id ("STRAIN0001") or name ("8-Ball Kush").

No output schema declared.

No examples provided.

get_target ~119

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"}.

NameTypeReqDescription
idstringyesTarget id, name or gene.

No output schema declared.

No examples provided.

list_structures_for_target ~149

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"}.

NameTypeReqDescription
limitinteger–How many items to return, at most 99.
targetstringyesTarget id, name or gene, for example "CB1" or "TRPV1".

No output schema declared.

No examples provided.

list_trials ~269

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}.

NameTypeReqDescription
compoundstring–Atlas compound id or name, for example "cbd".
conditionstring–Atlas condition id, name or other name, for example "cancer", "glioblastoma" or "sleep": the trials the atlas counts for that condition (only conditions with a tally; the answer says when there is no…
limitinteger–How many items to return, at most 25.
offsetinteger–Skip this many matching trials (for paging).
phasestring–Phase as registered.
querystring–Words in the title, the conditions or the MeSH terms, for example "epilepsy" or "chronic pain".
statusstring–Overall status as registered.

No output schema declared.

No examples provided.

search ~176

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"}.

NameTypeReqDescription
limitinteger–How many items to return, at most 20.
querystringyesAny name or words, for example "cannabidiol", "CB1", "myrcene", "epilepsy" or "chronic pain trial".

No output schema declared.

No examples provided.

search_compounds ~263

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}.

NameTypeReqDescription
classstring–Chemical class.
limitinteger–How many items to return, at most 100.
querystring–Part of a name or identifier, for example "cannabidiol", "CBD", "thymol" or "CDB000032". Leave out to list all.
recordTypestring–curated (atlas records with reviewed effects and grades) or database (compounds with a measured value at a placed target).
targetstring–A receptor, channel or enzyme by name or gene, for example "CB2", "CNR1" or "PPAR-gamma".

No output schema declared.

No examples provided.

search_conditions ~150

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"}.

NameTypeReqDescription
gradestring–Only conditions with this evidence grade.
querystring–Part of a condition name, for example "epilepsy", "pain" or "sleep". Leave out to list all.

No output schema declared.

No examples provided.

Install

How do I install the GreenCycle Compound Atlas MCP server?

GreenCycle Compound Atlas is a hosted endpoint at https://greencyclepedia.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · greencyclepedia.com

# add to Claude Code
claude mcp add --transport http com-greencyclepedia-atlas 'https://greencyclepedia.com/mcp'
Common questions

What is the GreenCycle Compound Atlas MCP server?

GreenCycle Compound Atlas is an MCP server listed in the public MCP registry as com.greencyclepedia/atlas. Read-only cannabis compound, receptor, anatomy and evidence data, every value sourced. This page covers its hosted endpoint (https://greencyclepedia.com/mcp).

Is the GreenCycle Compound Atlas MCP server safe to use?

GreenCycle Compound Atlas scores 82 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the GreenCycle Compound Atlas MCP server expose?

GreenCycle Compound Atlas exposes 14 tools: search, fetch, search_compounds, get_compound, compare_compounds, and 9 more. Their descriptions and schemas cost roughly 2,311 tokens of context every time the server is loaded.

Does the GreenCycle Compound Atlas MCP server require authentication?

No. We connected to GreenCycle Compound Atlas without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the GreenCycle Compound Atlas MCP server still maintained?

GreenCycle Compound Atlas is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.