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"List of Easy-to-Use Free MCP Servers for Proof of Concept Development" matching MCP servers:

  • mcp-clay-to-instantly

    mambalabsdev
    A
    license
    A
    quality
    B
    maintenance
    Enables pushing enriched leads into Instantly or Smartlead campaigns with ICP score gating, deduplication, and dry-run previews via an Apify actor.
    1
    85
    MIT

  • Centrex MCP Server

    AllianceGS-Development
    A
    license
    B
    quality
    C
    maintenance
    Enables Claude to interact with the Centrex CRM & LOS API, providing direct access to contacts, advances, documents, alerts, users, teams, and lender submissions.
    20
    MIT

  • Nose for Leads MCP

    NoseForLeads
    A
    license
    -
    quality
    B
    maintenance
    Finds, filters, and verifies local-business leads on demand; every returned email carries a verification receipt (verifier, verdict, timestamp). Credit-based with per-key spend budgets; 25 free validated leads at signup.
    MIT

  • AFAS MCP Server for HR and

    RemseyMailjard
    A
    license
    -
    quality
    C
    maintenance
    Provides interactive tools to explore AFAS customer data and employee leave information, including bubble charts, leave balance reports, and detailed leave cards.
    128
    MIT

  • Cirrus Solar MCP

    srobbins-sfdc
    F
    license
    -
    quality
    C
    maintenance
    MCP server that enables Google ADK agents to triage solar fault signals, retrieve Salesforce diagnostics via hosted MCP prompt templates, and create WorkOrder records when replacements are needed.

  • Freento MCP Server for Magento

    Freento
    F
    license
    -
    quality
    A
    maintenance
    Freento MCP is a native Magento 2 extension that implements the Model Context Protocol (MCP) — an open standard for connecting AI assistants to external data sources. This server acts as a secure, direct bridge between your Adobe Commerce / Magento 2 store and LLM-powered assistants (like Claude, ChatGPT, and others), allowing you to manage and audit your store using natural language.
    15

  • @themelt/mcp-server

    omer907
    A
    license
    A
    quality
    A
    maintenance
    Enables AI assistants to identify and quantify value leaks in organizations using Melt's methodology, providing structured estimates instead of generic vendor lists.
    3
    104
    MIT

  • Salestools Club

    akhilkannur
    A
    license
    A
    quality
    D
    maintenance
    Salestools Club is a technical registry and audit of 300+ sales APIs and MCP servers.
    5
    11
    MIT

  • corymbus-mcp

    laSonde
    A
    license
    A
    quality
    C
    maintenance
    Non-official MCP server for the Corymbus CRM, enabling natural language querying and modification of CRM data via MCP clients like Claude.
    13
    MIT

  • gong-mcp

    bgrgndzz
    A
    license
    A
    quality
    D
    maintenance
    MCP server for the Gong API, enabling search and retrieval of calls, transcripts, attendees, next steps, and more.
    7
    671
    MIT

  • MCP Pool

    vineethkrishnan
    A
    license
    A
    quality
    A
    maintenance
    A curated collection of Model Context Protocol (MCP) servers for popular SaaS platforms — Stripe, Sentry, Notion, Linear, Datadog, Vercel, PagerDuty, HubSpot, Intercom, Shopify, Google Workspace
    28
    1
    MIT

  • yuki-mcp

    CodeMill-Solutions
    A
    license
    A
    quality
    C
    maintenance
    Connects AI agents to Yuki accounting via SOAP API, enabling management of administrations, relations, invoices, transactions, and documents through natural language.
    31
    47
    9
    MIT

  • bitrix24-mcp-server

    paskal
    A
    license
    A
    quality
    B
    maintenance
    Exposes Bitrix24 REST API to AI assistants, enabling management of tasks, CRM entities, call recordings (with local transcription), users, workgroups, and Knowledge Base articles.
    43
    9
    1
    MIT