JustCall MCP Server
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. Its 40 documented tools cover sms, user, tag, contact. It is available as a remote MCP endpoint.
Teams that want a hosted endpoint instead of running a local process. The project is written in HTML.
VERIFIED ACTIVE
LAST COMMIT 2026-03-12 · ★ 25 · #755 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25
MIT · HTML · how we verify → /methodology
01 · Install JustCall MCP Server
Claude Code
claude mcp add saaslabsco-justcall-mcp-server --transport http https://mcp.justcall.host/mcpClaude Desktop / Cursor / VS Code - add to config
{
"mcpServers": {
"saaslabsco-justcall-mcp-server": {
"url": "https://mcp.justcall.host/mcp"
}
}
}Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.
Using another client? Same JSON, different key
Claude Desktop · mcpServers
Cursor · mcpServers
VS Code · servers
Windsurf · mcpServers
Zed · context_servers
Cline · mcpServers
Roo Code · mcpServers
Continue · mcpServers
LibreChat · mcpServers
Gemini CLI · mcpServers
Codex CLI · mcp_servers
Full setup guides: every client.
02 · Evidence
https://mcp.justcall.host/mcp
transport: streamable-http
endpoint alive - authentication required · probed 2026-08-25
Security posture
What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.
runs as remote - your agent's requests go to mcp.justcall.host
endpoint auth requires authentication - rejected our unauthenticated MCP initialize
license MIT - declared in the repository
registry vendor namespace host.justcall.mcp - domain-verified with the official MCP registry
03 · What JustCall MCP Server can do
Prose above is summarized from the project's README and registry record - no invented capabilities.
What you can build
With this server connected, an agent can list all JustCall calls with various filtering options, get a specific JustCall call by ID, update a JustCall call (disposition, notes, rating), and fetch the sequence of events for a specific call.
Capability map
Tools grouped from the project's README - what JustCall MCP Server lets an agent do.
Sms
11 tools - e.g. Send an SMS/text message to a contact; Retrieve all SMS/text messages; Get detailed information for a specific SMS/text message
send_sms · list_sms · get_sms · check_sms_reply · list_sms_tags · get_sms_tag…
read & search
10 tools - e.g. Lists all JustCall calls with various filtering options; Get a specific JustCall call by ID; Fetch the sequence of events for a specific call
list_calls · get_call · get_call_journey · list_users · get_agent_analytics · get_account_analytics…
User
4 tools - e.g. Get detailed information for a specific user/agent; Update a user's availability status to available or unavailable for calls; Retrieve all user groups defined in the account
get_user · update_user_availability · list_user_groups · get_user_group
Contact
4 tools - e.g. Retrieve detailed information for a specific contact by ID; Create a new contact in the CRM; Update/modify details of an existing contact
get_contact · create_contact · update_contact · update_contact_status
Appointment
3 tools - e.g. Retrieve all available time slots for appointments on a specific calendar; Schedule a new appointment on a specific calendar; Retrieve details of a specific appointment by its ID
list_appointment_slots · create_appointment · get_appointment
Voice
2 tools - e.g. Get voice agent data for a specific call (deprecated, use get_voice_agent_call); Retrieve voice agent related data for a specific call
get_voice_agent_data · get_voice_agent_call
Contacts
2 tools - e.g. Retrieve all contacts from the CRM; Add one or more contacts to the global blacklist in bulk
list_contacts · add_contacts_blacklist
Number
2 tools - e.g. Retrieve number analytics data for specified date range; Retrieve detailed information for a specific JustCall phone number
get_number_analytics · get_number
Latest releases
v1.2.0 · 2025-12-02
What's New · This release introduces rich, interactive UI widgets for displaying call data within OpenAI Apps, significantly enhancing the user experience when working with JustCall MCP tools. · OpenAI Apps SDK Widget…
v1.0.0 · 2025-11-14
We're excited to announce version 1.0.0 of the JustCall MCP Server, featuring enhanced security with OAuth2 authentication support. · Security Enhancements · This release introduces comprehensive OAuth2 authentication…
v0.0.11 · 2025-11-14
We're excited to announce a major expansion of the JustCall MCP Server with comprehensive API coverage across both JustCall and SalesDialer platforms! · What's New · This release dramatically expands the capabilities…
04 · Who maintains JustCall MCP Server
JustCall MCP Server is maintained by saaslabsco. It's the only MCP server we track from this author; the repo dates to Oct 2025.
05 · Facts
- repository
- github.com/saaslabsco/justcall-mcp-server
- website
- https://justcall.io/
- category
- other - ranked #755 of 848 actively-maintained other servers as of 2026-08-25.
- registry
- host.justcall.mcp/justcall-mcp-server (active, first published 2025-10-09 · 5 versions)
06 · JustCall MCP Server FAQ
Is JustCall MCP Server still maintained?
Yes - as of 2026-08-25, its last commit was 2026-03-12. We re-verify nightly.
What can JustCall MCP Server do?
With this server connected, an agent can list all JustCall calls with various filtering options, get a specific JustCall call by ID, update a JustCall call (disposition, notes, rating), and fetch the sequence of events for a specific call.
How do I install JustCall MCP Server?
Run `claude mcp add saaslabsco-justcall-mcp-server --transport http https://mcp.justcall.host/mcp`. You can also paste the ready-made client config above.
Does JustCall MCP Server require authentication?
Yes - when we probed the endpoint on 2026-08-25, it rejected an unauthenticated MCP initialize; you'll need credentials to connect.
07 · Alternatives to JustCall MCP Server
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