3CX MCP Server (SSIG-IT/3cx-mcp-server) is an MCP server listed on the M8ven Trust Index. It scores 60 out of 100, grade C. It declares 22 tools. No publisher has claimed this listing.
An MCP server that connects Claude to a 3CX Phone System (V20+), enabling user management, call monitoring, contact search, and forwarding configuration.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
get_active_callsReturns all currently active (live) calls on the 3CX system. Each call includes caller/callee info, duration, and status. Returns an empty array if no calls are in progress. Use this for 'who is on the phone right now?' questions.
get_call_historyUse this for ANY question about past calls: 'show today's calls', 'missed calls today', 'recent calls for extension 101', 'calls to queue 802 yesterday'. Returns newest calls first. Each record: StartTime, SourceDisplayName, SourceCallerId, DestinationDisplayName, DestinationCallerId, Answered (true…
search_contactsUse this when the user asks about contacts or the phonebook: 'find contact Mueller', 'search for Acme', 'who has number 0731...'. Searches across FirstName, LastName, CompanyName, Business phone, and PhoneNumber. Returns: Id, FirstName, LastName, CompanyName, PhoneNumber, Business, Email, Department…
find_contact_by_phoneUse this when the user provides a specific phone number and wants to know who it belongs to: 'whose number is +49 731 123456?', 'who called from 0176-1234567?'. Normalizes the number (ignores spaces, dashes, formatting) for exact matching across all phone fields.
list_departmentsReturns all 3CX departments (called 'Groups' in the API). Each department has: Id, Name, Number, Language, TimeZoneId, Members. The Id is needed for update_department. Filter examples: "Name eq 'Sales'", "Name eq 'DEFAULT'".
create_department[DESTRUCTIVE] Creates a new department (group) in 3CX. Returns the created department with its assigned Id.
update_department[DESTRUCTIVE] Updates a 3CX department by its numeric Id. Get the Id from list_departments first. Only provided fields are changed.
get_extension_statusUse this when the user asks 'is extension 101 online?', 'what status has extension 200?', or 'is Philipp available?'. Returns: Number, DisplayName, IsRegistered (true=phone connected), CurrentProfileName (Available/Away/Out of office), QueueStatus (LoggedIn/LoggedOut). For full user details use get_…
get_forwarding_profilesUse this when the user asks 'how are calls routed for extension 101?', 'what forwarding profiles does 200 have?', or 'show me the call routing for Philipp'. Returns the active profile name and all available profiles (Available, Away, Out of office, Custom 1, Custom 2) with their routing rules. Call …
set_forwarding_profile[DESTRUCTIVE] Use this when the user wants to change call routing: 'set extension 101 to Away', 'put Philipp on DND'. Changes take effect immediately. Valid profiles: 'Available', 'Away', 'Out of office', 'Custom 1', 'Custom 2'. Call get_forwarding_profiles first if you need to verify available prof…
get_event_logsReturns system event logs from 3CX. Each entry has: Id, Type (Info/Warning/Error), EventId, Message. Filter examples: "Type eq 'Error'" for errors only, "Type eq 'Warning'" for warnings. Use this for 'are there any errors on the phone system?' or 'show me recent system events' questions.
find_queuesUse this when the user asks about call queues: 'show all queues', 'find support queue', 'which queue is 802?'. Searches by queue number or name with fuzzy matching. Returns: Id, Number, Name, IsRegistered, PollingStrategy, Agents (with login status), RingTimeout, MaxWaitTime. Use get_queue_agents fo…
get_queue_agentsUse this when the user asks 'who is in queue X?', 'which agents are logged into 802?', or 'who is working the support queue?'. Resolves the queue by number or name, then returns its agents with login status. Set loggedInOnly=true to show only currently logged-in agents.
list_ring_groupsUse this when the user asks about ring groups (not queues). Ring groups ring multiple extensions simultaneously or in sequence. Returns: Id, Number, Name, Members, RingStrategy.
get_system_statusReturns 3CX system overview. Fields: FQDN, Version, Activated, MaxSimCalls, ExtensionsRegistered, ExtensionsTotal, TrunksRegistered, TrunksTotal, CallsActive, LicenseActive, ExpirationDate, MaintenanceExpiresAt, Support, ProductCode, BackupScheduled, LastBackupDateTime, DiskUsage, FreeDiskSpace, OS.…
list_trunksReturns all SIP trunks configured on the 3CX system. Each trunk has: Id, Number, Name, IsOnline (registration status), Direction, SimultaneousCalls. Use get_trunk_details with the Id for full configuration details.
get_trunk_detailsReturns full configuration of a specific SIP trunk including registration details, codecs, routes, and authentication. Get the trunk Id from list_trunks first.
find_usersUse this when the user asks about people, extensions, or phone users. Searches across extension number, first name, last name, display name, email, and mobile. Examples: 'find Philipp', 'who has extension 101?', 'who is online?', 'list all users'. Set onlyRegistered=true for 'who is online/registere…
get_userUse this when the user asks about ONE specific extension by number. Returns the complete user record including the numeric Id (needed for update_user and delete_user). Fields: Id, Number, FirstName, LastName, DisplayName, EmailAddress, Mobile, IsRegistered, CurrentProfileName, QueueStatus, Enabled, …
create_user[DESTRUCTIVE] Creates a new 3CX user/extension. The Number must be unused — use find_users first to check availability. Returns the created user with its assigned Id. Requires confirmation from the user before executing.
update_user[DESTRUCTIVE] Updates a 3CX user by numeric Id. Get the Id from get_user or list_users first. Only provided fields are changed. Can update name, email, mobile, or enable/disable a user.
delete_user[DESTRUCTIVE] Permanently deletes 3CX users by their numeric Ids. Cannot be undone. Get Ids from get_user or list_users first. Accepts an array to delete multiple users at once.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
MCP_HTTP_HOSTMCP_HTTP_PORTTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
22/22 tools missing one or more hints — get_active_calls (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_call_history (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); search_contacts (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +19 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
19/22 tool handlers declare input schemas (86%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tests exist
No test files found
Add tests that exercise each declared tool.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.12.0 (high), @modelcontextprotocol/sdk@1.12.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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