# GreenCycle Compound Atlas (remote · greencyclepedia.com)

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

- Trust score: 82/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `greencyclepedia.com`: 82/100 (this document), [markdown](https://verifymcp.io/servers/com-greencyclepedia-atlas/greencyclepedia.md), [page](https://verifymcp.io/servers/com-greencyclepedia-atlas/greencyclepedia)

## Channel facts

- Endpoint: `https://greencyclepedia.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.1`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 83/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 81/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - 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.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 47/100
  - Stability observed for 14 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 14 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 16 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## 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.

### Claude

```bash
claude mcp add --transport http com-greencyclepedia-atlas 'https://greencyclepedia.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-greencyclepedia-atlas": {
      "url": "https://greencyclepedia.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-greencyclepedia-atlas": {
      "type": "http",
      "url": "https://greencyclepedia.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-greencyclepedia-atlas]
url = "https://greencyclepedia.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-greencyclepedia-atlas": {
      "type": "remote",
      "url": "https://greencyclepedia.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-greencyclepedia-atlas --url 'https://greencyclepedia.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-greencyclepedia-atlas:
    url: "https://greencyclepedia.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-greencyclepedia-atlas": {
      "Transport": "http",
      "Url": "https://greencyclepedia.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-greencyclepedia-atlas -t streamable-http -u 'https://greencyclepedia.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-greencyclepedia-atlas": {
      "type": "http",
      "url": "https://greencyclepedia.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 82, +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.

### 2026-11-02 (score 81, +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.

### 2026-10-31 (score 80, 0)

- [security] 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
- [functional regression] Schema quality: 143 → 158
- [cosmetic] “find_studies” added an optional parameter “query”
- [cosmetic] “list_trials” added an optional parameter “condition”
- [cosmetic] “search” added an optional parameter “limit”

### 2026-10-30 (score 80, +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.

### 2026-10-28 (score 79, +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.

### 2026-10-26 (score 78, +1)

- [security] The server rewrote its instructions, which are the text every model session reads
- [functional regression] 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”

### 2026-10-24 (score 77, +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.

### 2026-10-23 (score 76, 0)

- [functional improvement] Stability: unverified → 0.03

## MCP tools (14)

### `search` (~176 tokens)

Search the atlas

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"}.

Input parameters:

- `limit` (integer): How many items to return, at most 20.
- `query` (string, required): Any name or words, for example "cannabidiol", "CB1", "myrcene", "epilepsy" or "chronic pain trial".

### `fetch` (~133 tokens)

Fetch one record

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"}.

Input parameters:

- `id` (string, required): A record id from search, for example "compound:cbd".

### `search_compounds` (~263 tokens)

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}.

Input parameters:

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

### `get_compound` (~222 tokens)

Get a 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"}.

Input parameters:

- `id` (string, required): Atlas id ("thc", "bcp"), database id ("CDB000032"), name ("Beta-caryophyllene", "Thymol") or PubChem CID (16078 or "CID 16078").

### `compare_compounds` (~116 tokens)

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"]}.

Input parameters:

- `ids` (array, required): Two to four compound ids or names, for example ["thc", "cbd"].

### `get_target` (~119 tokens)

Get a molecular 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"}.

Input parameters:

- `id` (string, required): Target id, name or gene.

### `list_structures_for_target` (~149 tokens)

Body structures carrying a 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"}.

Input parameters:

- `limit` (integer): How many items to return, at most 99.
- `target` (string, required): Target id, name or gene, for example "CB1" or "TRPV1".

### `find_studies` (~230 tokens)

Find the studies behind a finding

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"}.

Input parameters:

- `compound` (string): A compound id or name, for example "cbd".
- `condition` (string): A condition, for example "epilepsy".
- `limit` (integer): How many items to return, at most 50.
- `query` (string): Or a plain phrase, for example "cbd epilepsy" or "studies on CB1": the compound, target and condition it names are used.
- `target` (string): A target, for example "TRPV1".

### `search_conditions` (~150 tokens)

Search conditions by evidence grade

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"}.

Input parameters:

- `grade` (string): Only conditions with this evidence grade.
- `query` (string): Part of a condition name, for example "epilepsy", "pain" or "sleep". Leave out to list all.

### `list_trials` (~269 tokens)

List registered 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}.

Input parameters:

- `compound` (string): Atlas compound id or name, for example "cbd".
- `condition` (string): 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…
- `limit` (integer): How many items to return, at most 25.
- `offset` (integer): Skip this many matching trials (for paging).
- `phase` (string): Phase as registered.
- `query` (string): Words in the title, the conditions or the MeSH terms, for example "epilepsy" or "chronic pain".
- `status` (string): Overall status as registered.

### `get_cultivar` (~138 tokens)

Get a measured 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"}.

Input parameters:

- `id` (string, required): CCD cultivar id ("STRAIN0001") or name ("8-Ball Kush").

### `cite` (~119 tokens)

Cite an atlas record

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"}.

Input parameters:

- `id` (string): A record id or name, for example "compound:cbd", "CB1" or "epilepsy". Leave out to cite the atlas.

### `get_changes` (~66 tokens)

Recent dataset 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}.

Input parameters:

- `limit` (integer): How many items to return, at most 20.

### `ask_atlas` (~161 tokens)

Ask the atlas a question

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"}.

Input parameters:

- `question` (string, required): A plain question that names a compound, a condition or a receptor, for example "does CBD help epilepsy".

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-greencyclepedia-atlas/greencyclepedia#diagnostics

## Score history

- 2026-11-05: 82
- 2026-11-04: 82
- 2026-11-03: 81
- 2026-11-02: 81
- 2026-11-01: 80
- 2026-10-31: 80
- 2026-10-30: 80
- 2026-10-29: 79
- 2026-10-28: 79
- 2026-10-27: 78
- 2026-10-26: 78
- 2026-10-25: 77
- 2026-10-24: 77
- 2026-10-23: 76
- 2026-10-22: 76

## 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.

## Links

- Remote endpoint: https://greencyclepedia.com/mcp
- Repository: https://github.com/Moses10119/greencycle-atlas-mcp
- Website: https://greencyclepedia.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-greencyclepedia-atlas/greencyclepedia.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-greencyclepedia-atlas/greencyclepedia.json
- HTML version of this page: https://verifymcp.io/servers/com-greencyclepedia-atlas/greencyclepedia