Plain (tellahq) MCP Server
@tellahq/plain-mcp
npm
v1.2.0
Published by @tellahq — no publish provenance, so origin is unverified, but the source is public: the repository link below is self-declared yet readable, so you can inspect the code before adopting it.
MCP server for Plain.com support platform
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 − 4 = 96. 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 |
| −1 | publisher verification (public source) — no provenance, but the source is public and inspectable |
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 1
medium Untrusted input can drive an external actionMTC-FLOW-005
Untrusted-input tools ([change_thread_priority]) co-exist with external-action tools ([create_webhook, update_webhook, delete_webhook, send_email]). A prompt injection could cause unwanted external actions, though no direct sensitive-data leak path was found.
Evidence: untrusted [change_thread_priority] → sinks [create_webhook, update_webhook, delete_webhook, send_email]
Fix: Require confirmation for state-changing/egress actions triggered after processing untrusted content.
Location: flow change_thread_priority → create_webhook
Tools 78
Each tool and what it can reach — statically extracted from the published source.
change_thread_priorityingests untrusted inputcreate_webhooknetwork egressdelete_webhooknetwork egresssend_emailnetwork egressupdate_webhooknetwork egressadd_customer_to_groupsno sensitive capabilityadd_labels_to_threadno sensitive capabilityassign_threadno sensitive capabilitychange_thread_status_to_todono sensitive capabilitycreate_autoresponderno sensitive capability
Show 68 more tools ↓
create_customer_eventno sensitive capabilitycreate_customer_groupno sensitive capabilitycreate_help_centerno sensitive capabilitycreate_help_center_article_groupno sensitive capabilitycreate_knowledge_sourceno sensitive capabilitycreate_label_typeno sensitive capabilitycreate_noteno sensitive capabilitycreate_snippetno sensitive capabilitycreate_threadno sensitive capabilitycreate_thread_eventno sensitive capabilitycreate_tierno sensitive capabilitydelete_autoresponderno sensitive capabilitydelete_companyno sensitive capabilitydelete_customerno sensitive capabilitydelete_help_centerno sensitive capabilitydelete_help_center_articleno sensitive capabilitydelete_help_center_article_groupno sensitive capabilitydelete_knowledge_sourceno sensitive capabilitydelete_noteno sensitive capabilitydelete_snippetno sensitive capabilitydelete_tenantno sensitive capabilitydelete_threadno sensitive capabilitydelete_tierno sensitive capabilitygenerate_help_center_articleno sensitive capabilityget_customerno sensitive capabilityget_help_centerno sensitive capabilityget_help_center_articleno sensitive capabilityget_help_center_article_by_slugno sensitive capabilityget_help_center_article_groupno sensitive capabilityget_help_center_indexno sensitive capabilityget_queue_statsno sensitive capabilityget_threadno sensitive capabilityget_workspaceno sensitive capabilitylist_autorespondersno sensitive capabilitylist_customer_groupsno sensitive capabilitylist_help_center_article_groupsno sensitive capabilitylist_help_center_articlesno sensitive capabilitylist_help_centersno sensitive capabilitylist_label_typesno sensitive capabilitylist_snippetsno sensitive capabilitylist_thread_field_schemasno sensitive capabilitylist_threadsno sensitive capabilitylist_tiersno sensitive capabilitylist_usersno sensitive capabilitylist_webhooksno sensitive capabilitymark_customer_as_spamno sensitive capabilitymark_thread_doneno sensitive capabilitymark_thread_todono sensitive capabilityremove_customer_from_groupsno sensitive capabilityremove_labels_from_threadno sensitive capabilityreply_to_threadno sensitive capabilitysearch_customersno sensitive capabilitysend_chatno sensitive capabilitysnooze_threadno sensitive capabilityunassign_threadno sensitive capabilityunmark_customer_as_spamno sensitive capabilityupdate_help_centerno sensitive capabilityupdate_help_center_article_groupno sensitive capabilityupdate_help_center_custom_domainno sensitive capabilityupdate_help_center_indexno sensitive capabilityupdate_snippetno sensitive capabilityupdate_thread_titleno sensitive capabilityupsert_companyno sensitive capabilityupsert_customerno sensitive capabilityupsert_help_center_articleno sensitive capabilityupsert_tenantno sensitive capabilityupsert_thread_fieldno sensitive capabilityverify_help_center_custom_domainno sensitive capability
Toxic flows 1
Cross-tool combinations that form a data-exfiltration primitive (untrusted input → sensitive source → external sink).
What this scan could not see
- Tools were statically extracted from the published source (78 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 1
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 |
|---|---|---|---|---|
v1.2.0 latest |
A 96/100 | 1 | 1.13.0 | 2026-09-09 |
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 @tellahq/plain-mcp --onlineOther implementations of Plain 1
Independent packages implementing the same tool, scanned with the same engine. Compare all 2 side by side →
More in Developer Tools
Hotel booking MCP server — 300K+ properties, real confirmation numbers, loyalty programs. Builders monetize every booking via Stripe Connect. The first MCP server that completes real hotel reservations inside AI conversations.
Generates production-ready UI components from natural language, inspired by v0.
Manage AdGuard Home through AI assistants
Read-only Azure DevOps for MCP clients using only your existing browser session — no PAT, no Azure CLI. Browse work items, pull requests, comments, attachments and Artifacts feeds across every project, repo and feed you can access.
MCP server for Adobe Experience Manager Assets integration development
Servidor MCP para el tiempo oficial de España (API pública OpenData de AEMET). Predicción, observación y avisos como herramientas MCP tipadas.