AI · alternatives · 2026

24 alternatives to Tool for Testing MCP Servers

A visual debugger and test client for Model Context Protocol (MCP) servers. Debug, test tools, and inspect JSON-RPC traffic in real time.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.

1. 1
   MCP Playground▲160

   MCP Playground is a Postman-style tool for MCP — inspect servers, execute tools live, test your client, all from the browser. Four things in one place: 1. Free hosted MCP servers — four public test servers anyone can point their client at: Echo (connectivity), Auth (Bearer token flow), Error (error handling), Complex (multi-tool schemas).No sign-up, just use the URL. 2. Server inspector — paste any remote MCP server URL, see all its tools/resources/prompts, execute them live, inspect the full JSON-RPC log. HTTP, SSE, and WebSocket all supported. 3. Registry — 10,000+ servers…

   Nov 2025 · mcpplayground.io · its alternatives →

2. 2
   Bubble MCP▲5

   Debug, test, and ship MCP servers as a team

   Jul 2026 · its alternatives →

3. 3
   Cloud-Ready Postgres MCP Server▲167

   Hey HN, I built pg-mcp, a Model Context Protocol (MCP) server for PostgreSQL that provides structured schema inspection and query execution for LLMs and agents. It's multi-tenant and runs over HTTP/SSE (not stdio) Features - Supports multiple database connections from multiple agents - Schema Introspection: Returns table structures, types, indexes and constraints; enriched with descriptions from pg_catalog. (for well documented databases) - Read-Only Queries: Controlled execution of queries via MCP. - EXPLAIN Tool: Helps smart agents optimize queries before execution. - Extension…

   2025 · github.com · its alternatives →

4. 4MT
   MCPShark – Traffic Inspector for Model Context Protocol▲37

   https://github.com/mcp-shark/mcp-shark Site: https://mcpshark.sh/ I built MCPShark, a traffic inspector for the Model Context Protocol (MCP). It sits between your editor/LLM client and MCP servers so you can: • See all MCP traffic (requests, responses, tools, resources) in one place • Debug sessions when tools don’t behave as expected • Optionally run “Smart Scan” checks to flag risky tools / configs

   Dec 2025 · its alternatives →

5. 5WM
   We made an MCP server so Cursor can debug Node.js on its own▲139

   2025 · npmjs.com · its alternatives →

6. 6
   An MCP server that gives LLMs temporal awareness and time calculation▲91

   This is an open‑source Model Context Protocol (MCP) server that gives any LLM a sense of the passage of time. Most MCP demos wire LLMs to external data stores. That’s useful, but MCP is also a chance to give models perception — extra senses beyond the prompt text. Six functions (`current_datetime`, `time_difference`, `timestamp_context`, etc.) give Claude&#x2F;GPT real temporal awareness: It can spot pauses, reason about rhythms, and even label a chat’s “three‑act structure”. Runs locally in <60 s (Python) or via a hosted demo. If time works, what else could we surface? - Location &#x2F;…

   2025 · github.com · its alternatives →

7. 7
   MCP Traffic Analysis Tool▲38

   Wireshark-like forensic analysis for Model Context Protocol communications Capture, inspect, and investigate all HTTP requests and responses between your IDE and MCP servers - mcp-shark/mcp-shark

   Nov 2025 · github.com · its alternatives →

8. 8
   A MCP server and client implementing the latest spec▲72

   A comprehensive Model Context Protocol (MCP) server implementing the latest specification. - hemanth/paws-on-mcp

   2025 · github.com · its alternatives →

9. 9
   TrackMCP▲105

   Google Analytics for MCP Servers

   Sep 2026 · trackmcp.com · its alternatives →

10. 10
    MCP-Shield – Detect security issues in MCP servers▲134

    I noticed the growing security concerns around MCP (https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=43600192) and built an open source tool that can detect several patterns of tool poisoning attacks, exfiltration channels and cross-origin manipulations. MCP-Shield scans your installed servers (Cursor, Claude Desktop, etc.) and shows what each tool is trying to do at the instruction level, beyond just the API surface. It catches hidden instructions that try to read sensitive files, shadow other tools' behavior, or exfiltrate data. Example of what it detects: - Hidden instructions…

    2025 · github.com · its alternatives →

11. 11
    Kubernetes Diagnostics MCP Server▲8

    MCP server for Kubernetes troubleshooting and diagnostics.

    2025 · github.com · its alternatives →

12. 12
    MCP Server SDK in Bash▲144

    MCP server SDK/example implemented entirely in bash — build a Model Context Protocol server with no runtime dependency beyond a POSIX shell. - muthuishere/mcp-server-bash-sdk

    2025 · github.com · its alternatives →

13. 13OS
    Open-Source MCP Server for Context and AI Tools▲43

    Large Language Models (LLMs) are powerful, but they’re limited by fixed context windows and outdated knowledge. What if your AI could access live search, structured data extraction, OCR, and more—all through a standardized interface? We built the JigsawStack MCP Server, an open-source implementation of the Model Context Protocol (MCP) that lets any AI model call external tools effortlessly. Here’s what it unlocks: - Web Search & Scraping: Fetch live information and extract structured data from web pages. - OCR & Structured Data Extraction: Process images, receipts, invoices, and handwritten…

    2025 · its alternatives →

14. 14
    mcpc – Universal command-line client for Model Context Protocol (MCP)▲50

    A universal CLI client for MCP. mcpc supports persistent sessions, stdio/HTTP, OAuth 2.1, tasks, JSON output for code mode, proxy for AI sandboxes, x402, and more. - apify/mcpc

    Jan 2026 · github.com · its alternatives →

15. 15MV
    MCPShark Viewer (VS Code/Cursor extension)- view MCP traffic in-editor▲28

    A few days ago I posted MCPShark (a traffic inspector for the Model Context Protocol). I just shipped a VS Code &#x2F; Cursor extension that lets you view MCP traffic directly in the editor, so you’re not jumping between terminals, logs, and "I think this is what got sent". VS Code Marketplace: https:&#x2F;&#x2F;marketplace.visualstudio.com&#x2F;items?itemName=MCPShark... Main repo: https:&#x2F;&#x2F;github.com&#x2F;mcp-shark&#x2F;mcp-shark Feature requests &#x2F; issues: https:&#x2F;&#x2F;github.com&#x2F;mcp-shark&#x2F;mcp-shark&#x2F;issues Site: https:&#x2F;&#x2F;mcpshark.sh&#x2F; If…

    Dec 2025 · its alternatives →

16. 16
    MCPAGENTSEEK▲14

    Global search engine for model context protocol tools

    2025 · mcpagentseek.com · its alternatives →

17. 17
    Web Accessibility Testing MCP▲74

    Give LLMs access to web accessibility testing APIs

    Jan 2026 · github.com · its alternatives →

18. 18
    SpecToMCP▲19

    Generate MCP servers from OpenAPI specification files

    2025 · spectomcp.updab.com · its alternatives →

19. 19
    Mcpsnoop – Wireshark for MCP (transparent proxy and live TUI)▲64

    Wireshark for MCP. A transparent proxy that shows every real tool call between your AI client and your MCP servers, live in your terminal. - kerlenton/mcpsnoop

    Jul 2026 · github.com · its alternatives →

20. 20
    ContextGuard▲12

    I built ContextGuard after discovering that 43% of MCP servers have critical security vulnerabilities. MCP (Model Context Protocol) is the new standard that lets Claude Clients(Desktop, Windsurf, Cursor, etc.) access external tools and data sources - think of it as a plugin system for AI assistants. The problem: When you give those clients access to your filesystem, databases, or APIs through MCP servers, you're opening up serious attack vectors. Prompt injection, data leakage, and path traversal attacks are all possible. Most developers building MCP servers don't have security expertise,…

    2025 · github.com · its alternatives →

21. 21
    FindMCPServers▲16

    Directory of MCPs (Model Context Protocol)

    2025 · findmcpservers.com · its alternatives →

22. 22
    MCPGod: Fine-grained control over MCP clients, servers, and tools▲37

    Hey everyone, I've wanted an easy way to control which mcp server tools are available to clients. So for example, I might want a gmail server to only expose the read tool (but not send, delete etc). I figured if I create a cli for spawning mcp servers, I could intercept the stdin, stdout, stderr etc and modify what the clients see when they are making calls to list tools, resources, and prompts. Well it worked! In the initial version you can easily add a server to claude with a safe list of tools: npx -y mcpgod add @modelcontextprotocol&#x2F;server-everything --client claude --tools=echo,add…

    2025 · github.com · its alternatives →

23. 23
    npmcreate-mcp-tools▲13

    Create MCP Server Creation Made Simple

    2025 · npmjs.com · its alternatives →

24. 24
    Remote MCP Server Testerfree▲1

    Inspect any remote MCP server — quality, cost, and security

    Aug 2026 · ytkoka.github.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →