Cairn (PyPI) MCP Server
cairn-mcp-server
PyPI
v0.3.1
Published by an unidentified publisher — no publish provenance and no public repository, so the publisher could not be verified and the source cannot be independently located.
MCP server exposing Cairn's local-first file-organization tools to Claude Code, Codex, Cursor, and any MCP client.
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 5 = 95. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −3 | capability blast radius (moderate) — client exposure if the model is manipulated |
| −2 | publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 2
medium Tool "create_file" can modify the filesystemMTC-CAP-002
Tool "create_file" can write, overwrite or delete files (keyword "create_file" in tool name). Verify it is scoped to a safe directory.
Fix: Constrain file operations to an explicit, non-sensitive root; reject path traversal.
Location: tool create_file
low Mutating tool "create_file" declares no destructiveHintMTC-CAP-005
Tool "create_file" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.
Fix: Declare accurate annotations, and gate destructive tools on user confirmation regardless.
Location: tool create_file
Tools 48
Each tool and what it can reach — statically extracted from the published source.
create_filewrites fileslist_dirreads sensitive dataadd_billno sensitive capabilityadd_person_to_billno sensitive capabilityadd_taskno sensitive capabilityadd_waitingno sensitive capabilityattentionno sensitive capabilitycomplete_taskno sensitive capabilitycreate_folderno sensitive capabilitydelete_itemno sensitive capability
Show 38 more tools ↓
digest_workspaceno sensitive capabilitydrop_waitingno sensitive capabilityfind_by_metano sensitive capabilityget_file_tagsno sensitive capabilityget_file_treeno sensitive capabilityget_tag_treeno sensitive capabilitygrepno sensitive capabilityharvest_checklistsno sensitive capabilityimport_documentno sensitive capabilityimport_folderno sensitive capabilitylist_billsno sensitive capabilitylist_paper_projectsno sensitive capabilitylist_tasksno sensitive capabilitylist_templatesno sensitive capabilitylist_waitingno sensitive capabilitymark_receivedno sensitive capabilitymove_itemno sensitive capabilitymulti_editno sensitive capabilitynext_actionsno sensitive capabilitypreview_paper_recommendationsno sensitive capabilityproject_pulseno sensitive capabilityread_detailno sensitive capabilityrecommend_papersno sensitive capabilityrecommend_papers_all_projectsno sensitive capabilityrefresh_project_dashboardno sensitive capabilityreindexno sensitive capabilityreminder_digestno sensitive capabilityrename_itemno sensitive capabilitysearch_filesno sensitive capabilitysemantic_retrieveno sensitive capabilityset_statusno sensitive capabilitysettle_billno sensitive capabilitystale_projectsno sensitive capabilityupdate_file_tagsno sensitive capabilityupdate_taskno sensitive capabilityweekly_reviewno sensitive capabilitywho_owesno sensitive capabilitywho_owes_meno sensitive capability
What this scan could not see
- Tools were statically extracted from the published source (48 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Versions 2
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v0.3.1 latest |
A 95/100 | 2 | 1.13.0 | 2026-08-25 |
v0.2.0 |
A 95/100 | 2 | 1.12.1 | 2026-07-27 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
npx mcptrustchecker scan cairn-mcp-server --online --registry pypiOther implementations of Cairn 1
Independent packages implementing the same tool, scanned with the same engine. Compare all 2 side by side →
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