"A system or program using SSE instead of STDIO" matching MCP servers:

An MCP server that enables AI agents to manage Smartlead campaigns, including creating campaigns, updating schedules, managing email sequences, and adding leads, all over SSE.

Enables AI assistants to manage Bitrix24 CRM entities, tasks, project kanban boards, and Scrum sprints through an incoming webhook, requiring explicit user confirmation for all write operations.

Provides read-only access to the Planning Center People API, enabling natural language queries for people, households, background checks, and lists.

Enables AI agents to perform CRM operations like creating contacts, managing deals, and updating leads through natural language using the Model Context Protocol.

Enables read-only access to InvoiceNinja data, including invoices, expenses, clients, and tax reports, for AI assistants like Claude.

Enables AI assistants to identify and quantify value leaks in organizations using Melt's methodology, providing structured estimates instead of generic vendor lists.

A production-grade MCP server for Zendesk that provides ticket management, search, user/group operations, and knowledge base access with support for local stdio and remote HTTP transports, authentication via API keys or OAuth, and multi-tenancy.

Connects Claude to Jobber to manage clients, jobs, invoices, quotes, and scheduling through natural language.

Provides 45 MCP tools to search, enrich, and manage Apollo.io B2B data (people, companies, CRM, deals, tasks, sequences, etc.) via stdio or HTTP transport.

A production-ready MCP server that connects AI assistants to the D-Tools System Integrator platform, enabling natural language management of AV projects, clients, catalogs, tasks, service orders, and purchase orders.

Enables retrieval of customer records and triggering refunds via MCP tools, supporting both stdio and streamable HTTP transports.

A complete MCP server over the Bitrix24 REST API, enabling CRM, tasks, chats, files, calendar, HR, smart processes, mail, telephony, business processes, and events through 30 tools and ~290 actions. Supports incoming webhook or OAuth 2.0 authentication and works over stdio or Streamable HTTP.

Enables management of WHMCS installations via the WHMCS API, providing tools for clients, products, billing, support tickets, domains, orders, and system administration.

Enables querying, searching, and writing Salesforce data using a browser session cookie without requiring a connected app or OAuth setup.

Enables an AI assistant to manage a local address book, including searching people, retrieving details, logging interactions, creating reminders, and merging or deleting contacts via a set of 12 tools.

Enables AI agents to query live ERP/CRM records through Odoo's external JSON-RPC API, covering contact and company lookups, sales orders and quotations, CRM leads and opportunities, customer invoices, and generic search_read access to any Odoo model. Runs either as a hosted gateway endpoint or a local stdio server.

Enables querying and managing Salesforce records using SOQL, CRUD operations, and schema exploration through natural language or direct tool calls.

Enables offline management of sales contracts, customer receipts, traceable earnings accruals, actual payouts, and personal finance forecasts through a local stdio interface.

Open-source MCP gateway connecting AI agents like Claude Desktop and Claude Code to SuiteCRM. 24 CRM tools over SSE with OAuth2/OIDC auth, multi-entity support, ACL enforcement, and Prometheus/Grafana observability.

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