Marketo MCP Server
marketo-mcp-server
npm
v1.4.0
Published by zleventer — 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 Marketo — 45 tools covering leads, programs, emails, forms, smart lists, static lists, channels, landing pages, bulk export, analytics, and admin utilities
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 ([marketo_browse_folders, marketo_get_bulk_export_file]) co-exist with external-action tools ([marketo_get_lead_activities]). A prompt injection could cause unwanted external actions, though no direct sensitive-data leak path was found.
Evidence: untrusted [marketo_browse_folders, marketo_get_bulk_export_file] → sinks [marketo_get_lead_activities]
Fix: Require confirmation for state-changing/egress actions triggered after processing untrusted content.
Location: flow marketo_browse_folders → marketo_get_lead_activities
Tools 44
Each tool and what it can reach — statically extracted from the published source.
marketo_browse_foldersingests untrusted inputmarketo_get_bulk_export_fileingests untrusted inputmarketo_get_lead_activitiesnetwork egressmarketo_add_leads_to_listno sensitive capabilitymarketo_approve_formno sensitive capabilitymarketo_change_program_statusno sensitive capabilitymarketo_clone_emailno sensitive capabilitymarketo_clone_formno sensitive capabilitymarketo_clone_landing_pageno sensitive capabilitymarketo_clone_programno sensitive capability
Show 34 more tools ↓
marketo_clone_program_with_tokensno sensitive capabilitymarketo_create_bulk_export_leadsno sensitive capabilitymarketo_create_channelno sensitive capabilitymarketo_create_or_update_leadsno sensitive capabilitymarketo_delete_leadno sensitive capabilitymarketo_describe_lead_fieldsno sensitive capabilitymarketo_enqueue_bulk_exportno sensitive capabilitymarketo_find_dead_programsno sensitive capabilitymarketo_get_activities_paging_tokenno sensitive capabilitymarketo_get_bulk_export_statusno sensitive capabilitymarketo_get_channel_by_idno sensitive capabilitymarketo_get_channelsno sensitive capabilitymarketo_get_email_by_idno sensitive capabilitymarketo_get_emailsno sensitive capabilitymarketo_get_engagement_program_healthno sensitive capabilitymarketo_get_form_by_idno sensitive capabilitymarketo_get_formsno sensitive capabilitymarketo_get_landing_page_by_idno sensitive capabilitymarketo_get_landing_pagesno sensitive capabilitymarketo_get_lead_by_emailno sensitive capabilitymarketo_get_lead_by_idno sensitive capabilitymarketo_get_lead_listsno sensitive capabilitymarketo_get_lead_timelineno sensitive capabilitymarketo_get_program_by_idno sensitive capabilitymarketo_get_program_membersno sensitive capabilitymarketo_get_programsno sensitive capabilitymarketo_get_smart_campaign_mapno sensitive capabilitymarketo_get_smart_list_by_idno sensitive capabilitymarketo_get_smart_listsno sensitive capabilitymarketo_list_activity_typesno sensitive capabilitymarketo_rank_campaign_engagementno sensitive capabilitymarketo_remove_leads_from_listno sensitive capabilitymarketo_search_campaigns_by_filterno sensitive capabilitymarketo_send_sampleno 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 (44 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 |
|---|---|---|---|---|
v1.4.0 latest |
A 96/100 | 1 | 1.13.0 | 2026-09-08 |
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.
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