Atlas / MCP servers / saaslabsco / JustCall

JustCallCAUTION

Name: JustCall
Author: saaslabsco

mcp/saaslabsco/justcall

MCP server by saaslabsco · ai · mcp · mcp server · Audited 2026-10-09

⚑ Report / re-scan Source ↗

JustCall's Official MCP Server

Verdict

CAUTION

Grade

Trust score

89 /100

Exposed tools

66 44r · 20w · 2d

Transport

sse · streamable-http

License

MIT

Stars

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

The JustCall Model Context Protocol (MCP) Server lets Large Language Models (LLMs) and AI agents make real-world voice calls and send SMS directly through JustCall’s APIs — securely, contextually, and programmatically.

It provides a function-calling interface for conversational AI systems, enabling:

📞 AI-powered calling: Let your LLM initiate, manage, or transcribe calls using JustCall.
💬 Smart messaging: Allow your AI agent to send or respond to SMS within conversations.
⚙️ Seamless integration: Use the MCP standard to connect JustCall’s telephony capabilities with any LLM runtime or orchestration framework.

In short: It gives your LLMs a voice and a phone number — turning chatbots into truly conversational agents.

Claude Desktop Setup

Open Claude Desktop and press CMD + , to go to Settings.
Click on the Connectors tab.
Click on the Add Custom Connector button.
Add name as JustCall and Remote Server Url as https://mcp.justcall.host/mcp.
Now on JustCall from the Connectors list click on Connect button for JustCall.
It will open a JustCall page requesting API key and secret.
Get your JustCall API Key & Secret from the JustCall dashboard ().
Enter the API key and Secret and press Continue, it should redirect back you to Claude.

Claude Web - https://claude.ai

Open connectors url in your Browser - .
Click on the Connectors tab.
Click on the Add Custom Connector button.
Add name as JustCall and Remote Server Url as https://mcp.justcall.host/mcp.
Now on JustCall from the Connectors list click on Connect button for JustCall.
It will open a JustCall page requesting API key and secret.
Get your JustCall API Key & Secret from the JustCall dashboard ().
Enter the API key and Sec

Read from source at commit 69aca78ec6d0OBSERVED · 2026-10-09

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.

claude-code

claude mcp add mcp-server --env JUSTCALL_API_KEY=${JUSTCALL_API_KEY} --env JUSTCALL_API_SECRET=${JUSTCALL_API_SECRET} -- npx -y @justcall/[email protected]

claude-desktop

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@justcall/[email protected]"
      ],
      "env": {
        "JUSTCALL_API_KEY": "${JUSTCALL_API_KEY}",
        "JUSTCALL_API_SECRET": "${JUSTCALL_API_SECRET}"
      }
    }
  }
}

Exposed tools (66)

44 read · 20 write · 2 destructive. Blast radius: 2 tools can delete or overwrite — an agent that can be talked into calling a tool can be talked into calling this one.

Tool	Risk	Description
`add_contacts_blacklist`	write	Add one or more contacts to the JustCall account
`add_salesdialer_campaign_contact`	write	Add contact to a specific Sales Dialer campaign identified by Campaign ID
`add_salesdialer_contacts_dnca`	write	Add one or more contacts to the Sales Dialer\
`add_sms_thread_thread`	write	Add tag to a sms thread/conversation identified by thread ID or combination of contact number and JustCall number
`check_sms_reply`	read	Check for the most recent inbound sms/text message from a contact number
`check_whatsapp_message_reply`	read	Check for the most recent inbound whatsapp message from a contact number
`create_appointment`	write	Schedule a new appointment on a specific JustCall calendar
`create_contact`	write	Create a new contact in the JustCall account
`create_salesdialer_campaign`	write	Create a new Sales Dialer campaign in the JustCall account
`create_salesdialer_contact`	write	Create a new contact in Sales Dialer
`create_sms_tag`	write	Create a new sms tag in the JustCall account for tagging conversations
`create_voice_agent_call`	write	Initiate an outbound call from a configured AI voice agent to a contact number
`create_webhook`	write	Create a new webhook endpoint to receive real-time notifications
`delete_sms_tag`	destructive	Delete a specific sms tag by ID
`get_account_analytics`	read	Retrieve aggregated call analytics at the JustCall account level
`get_agent_analytics`	read	Retrieve call performance analytics for a specific agent identified by Agent ID
`get_appointment`	read	Retrieve details of a specific appointment by its ID
`get_call`	read
`get_call_ai_analysis`	read	Retrieve AI-generated analysis for a specific call by Call ID associated with either JustCall or Sales Dialer
`get_call_journey`	read	Fetch the sequence of events for a specific call identified by Call ID
`get_contact`	read	Retrieve detailed information for a specific contact by ID
`get_meeting_ai_analysis`	read	Retrieve AI-generated analysis for a specific meeting identified by Instance ID
`get_number`	read	Retrieve detailed information for a specific phone number by ID
`get_number_analytics`	read	Retrieve call analytics for a specific JustCall phone number
`get_salesdialer_agent_analytics`	read	Retrieve call performance analytics of a specific agent for a Sales Dialer campaign
`get_salesdialer_call`	read	Retrieve detailed information for a specific Sales Dialer call by Call ID
`get_salesdialer_campaign`	read	Retrieve detailed information for a specific Sales Dialer campaign by ID
`get_salesdialer_contact`	read	Retrieve detailed information for a specific contact in Sales Dialer by ID
`get_sms`	read	Retrieve detailed information for a specific sms/text by ID
`get_sms_tag`	read	Retrieve details of a specific sms tag by ID
`get_sms_thread`	read	Retrieve a specific sms thread/conversation by ID
`get_user`	read	Retrieve detailed information for a specific user by ID
`get_user_group`	read	Retrieve detailed information for a specific user group by ID
`get_voice_agent_call`	read	Retrieve voice agent related data for a specific call identified by Call ID
`get_whatsapp_message`	read	Retrieve detailed information for a specific whatsapp message by ID
`import_salesdialer_contacts`	write	Import multiple contacts into Sales Dialer or a campaign in bulk
`import_salesdialer_contacts_status`	write	Check the status of a bulk import job/request by its batch ID
`list_appointment_slots`	read	Retrieve all available time slots for appointments on a specific JustCall calendar
`list_blacklist_contacts`	read	Retrieve all blacklist contacts from the JustCall account
`list_calls`	read
`list_calls_ai_analysis`	read	Retrieve AI-generated analysis for all calls associated with either JustCall or Sales Dialer
`list_contacts`	read	Retrieve all contacts associated with the JustCall account
`list_meetings_ai_analysis`	read	Retrieve AI-generated analysis for recorded meetings
`list_numbers`	read	Retrieve all phone numbers associated with the JustCall account
`list_salesdialer_calls`	read	Retrieve all calls made via the Sales Dialer in JustCall
`list_salesdialer_campaign_contacts`	read	Retrieve all contacts in a specific Sales Dialer campaign identified by Campaign ID
`list_salesdialer_campaigns`	read	Retrieve all Sales Dialer campaigns in the JustCall account
`list_salesdialer_contacts`	read	Retrieve all contacts from Sales Dialer in the JustCall account
`list_salesdialer_custom_fields`	read	Fetch all custom contact fields defined in your Sales Dialer account and their details
`list_sms`	read	Retrieve all sms/text messages associated with the JustCall account
`list_sms_tags`	read	Retrieve the list of all sms tags defined in the JustCall account
`list_sms_threads`	read	Retrieve all sms threads/conversations associated with a JustCall number
`list_user_groups`	read	Retrieve all user groups defined in the JustCall account
`list_users`	read	Retrieve all users associated with the JustCall account
`list_voice_agents`	read	Retrieve all AI voice agents associated with the JustCall account
`list_webhooks`	read	Retrieve all configured webhooks
`list_whatsapp_messages`	read	Retrieve all whatsapp messages associated with the JustCall account
`list_whatsapp_templates`	read	Retrieve all whatsapp message templates available in the JustCall account
`send_sms_mms`	write	Send a new sms or text message or mms to a contact number
`send_whatsapp_message`	write	Send a new whatsapp message to a contact number
`update_call`	write	Update/modify details of an existing call record identified by Call ID
`update_contact`	write	Update/modify details of an existing contact in the JustCall account
`update_contact_status`	destructive	Add or remove a contact from DND/DNM/Blacklist lists in the JustCall account
`update_salesdialer_campaign`	write	Update/modify details of an existing Sales Dialer campaign in the JustCall account
`update_salesdialer_contact`	write	Update/modify details of an existing contact in Sales Dialer identified by ID
`update_user_availability`	write	Update a user

Trust audit

CAUTIONgrade B · trust 89/100 Install with care. The audit found things worth knowing before you trust its output.

Layer	What it checks	Result
L0	Provenance & inventory	PASS
L1	Static analysis of the code	WARN
L2	Instruction surface (what it tells the agent)	PASS
L3	Class-specific surface	WARN
L4	Behavioural (sandbox)	SKIPPED

What the source does

Filesystem: declared (6 observation(s))
Network: declared (5 observation(s))
Shell: none-observed
Dependencies: not all pinned
Secrets in source: none-found

Findings (14)

MEDIUMNetwork egress · net.beacon_words · CWE-200, CWE-319

src/dto/salesdialer/contacts.ts:57

callback_url?: string;

MEDIUMNetwork egress · net.beacon_words · CWE-200, CWE-319

src/schema/salesdialer/contacts.ts:108

callback_url: z

MEDIUMFilesystem / path · mcp.destructive_tools · CWE-22, CWE-59

delete_sms_tag, update_contact_status

Why it matters. 2 tool(s) can delete or overwrite

Fix. prefer a read-only mode or scoped tokens; the page states the blast radius

LOWInventory / provenance · inv.hidden_file · CWE-1104

.prettierignore

.prettierignore

Why it matters. hidden member outside the usual dotfiles

Fix. review its purpose