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MCP Testing Tools · Free · No Install

Test MCP Servers Online — Free, No Setup

Connect to any remote Model Context Protocol server from your browser. Explore tools, prompts, and resources — then debug with real-time JSON-RPC logs. Browse 10,000+ servers including Supabase, Playwright, Figma, GitHub, and more.

Free MCP playground for developers. Test MCP server tools, validate protocol implementations, and browse tutorials — all from one place, no credit card needed.

Test MCP ServerTest MCP with AITest MCP ClientConfig Generator
HTTP + SSE supportReal-time debug logs40+ AI models
MCP Server ListMCP Token CounterMCP Security ScannerMCP TutorialsMCP Recipes
[ MCP AGENT STUDIO ]NEW · FREE CREDITS

Build agents for

The fastest way to build, test, and ship MCP-powered AI agents — all in your browser.

  • Connect any server, any transport — HTTP, SSE, Streamable HTTP, or a local stdio/CLI process — up to 4 at once in one chat, tools merged automatically.
  • Compare 40+ models head-to-head — Run one prompt across up to 4 models in parallel; winner ribbons flag the fastest, cheapest, and most accurate.
  • Inspect every tool call live — Full request/response JSON, per-call latency, and credit cost for each step — no black box.
  • Export any agent as a production API — Save your servers, model, and prompt, then call a stable endpoint with bearer auth and a server-side locked prompt.
  • Zero setup to start — 50+ ready-to-run templates, or deploy a hosted MCP server with a live HTTPS URL and token in under a minute.
Try Studio →Browse Templates

✦ Free credits on sign-up · no credit card needed

Compare · “Show top 5 open issues”

Claude Sonnet 4.5

BEST ACCURACY
Found 5 open issues. Top priority: "Auth timeout in prod" (P0), "CSV export broken" (P1)…
list_issues()
Latency3.2s
Cost10 cr

GPT-5.4 nano

FASTESTCHEAPEST
Here are the top 5 open issues sorted by priority: Auth timeout (#312, P0), CSV export (#309, P1)…
list_issues()
Latency1.8s
Cost2 cr
Pick winner →

[ USE CASES ]

Agent Templates

GitHub, Stripe, Linear, Slack and more — pre-wired with the right model and system prompt.

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Compare Models

Run one prompt across up to 4 models simultaneously. Fastest, cheapest, and best-accuracy winners computed automatically.

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10,000+ MCP Servers

Browse the full registry and add any server with one click. HTTP, SSE, or local CLI (stdio) all supported.

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Live JSON Inspector

Full request/response JSON for every tool call with per-call latency. Debug anything instantly.

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Save & Reuse Agents

Snapshot your servers, model, and system prompt as a named agent. Load it back in one click.

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Stdio / CLI Servers

Run local MCP tools (npx, uvx) alongside remote HTTP servers. Inject env vars for auth without leaving the UI.

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What you can do

Test Any Remote MCP Server or Client

Get started instantly. No sign-up required. Test your MCP implementation in seconds.

Test MCP Server in Browser

Connect to any remote server and explore its capabilities

Test Remote Servers

Enter any MCP server URL and connect instantly

Browse Tools & Resources

Explore available tools, prompts, and resources

Execute & Debug

Call tools, get prompts, and read resources

Full Request/Response Logs

See all MCP protocol interactions in real-time

Start Testing Server

Why MCP Playground

Instant Testing

No setup, no install. Test in seconds.

Works with Any Server

Test any remote MCP implementation.

Full Protocol Support

Tools, prompts, resources — all supported.

Real-time Logging

See every request and response live.

Ready to get started? Completely free.

Test MCP ServerTest MCP Client

Overview

What is MCP Playground?

MCP Playground is a free, browser-based testing tool for the Model Context Protocol (MCP). Test MCP servers, clients, and tools directly in your browser without any installation or configuration.

Supports all core MCP features including tools, prompts, and resources. Connect to any remote server, browse capabilities, execute commands, and view real-time request/response logs.

Benefits

Why Use It for Testing?

Traditional MCP testing requires local setup, dependencies, and configuration. MCP Playground eliminates all of this — just enter a server URL and start testing.

Perfect for validating server implementations, testing tools before deployment, or exploring the MCP servers list. Works with any standard MCP server that supports remote connections.

Features

Key Features

Browser-Based

No software to install

Remote Servers

Connect via URL

Full Protocol

Tools, prompts, resources

Real-Time Logs

Live request/response

10000+ Servers

Official MCP Registry

Free & Open

No limits, no sign-up

Guide

How to Test MCP Servers

1

Navigate to the MCP server testing page

2

Enter your MCP server URL (add auth token if needed)

3

Click Connect to establish a connection

4

Browse tools, execute commands, view logs

Ready to test? Start testing MCP servers, explore the server registry, or validate your client. features remain free — no registration required.

MCP Playground — Test MCP Servers Online Free | No Install