MCP Playground
free MCP test servers, inspector, and 10K+ server list
Details
- External ID
- 47206930
- Source
- HN
- Company
- —
- Product
- MCP Playground
- Website domain
- mcpplaygroundonline.com
- Launched
- March 1, 2026
- Cohort
- —
- Upvotes
- 7
- Upvotes percentile
- 0.4108241082410824
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
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 indexed by category. Each links to the repo and can be tested in the inspector directly.4. Recipes + guides — 45 articles and step-by-step workflows for real use cases: GitHub PR reviewer, standup bot, database query assistant, Meta ads automation, and more.Everything free, no install, no sign-up.Happy to answer questions on the implementation.
Enrichment
- Theme
- Model Context Protocol developer tools
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- mcp test servers and inspector
- Manually corrected
- False
Could you build this?
Yes It is a web-based testing client and directory for MCP servers, functioning like Postman by sending JSON-RPC messages over Server-Sent Events or WebSockets to connected servers.
Discussion
9 comments analyzed.
Competitors mentioned: MCP Inspector
Concerns raised: Handshake drift in MCP setups, WebSocket transport not yet supported
Feature requests: Dark mode, Health badge showing last transport and error count, WebSocket (ws) transport support, Keep recipes section open for community contributions
Competitors
Other products that read as similar to this one — 148 launches clear the similarity bar, closest 8 shown.
Attention rank: #80 of 149 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 117 days after the earliest competitor.
- Tool for Testing MCP Servers · hn · 2026-01-07 · 5 upvotes · similarity 0.64
- MCPJam · ph · 2026-09-17 · 141 upvotes · similarity 0.60
- MCPSpec · hn · 2026-02-25 · 7 upvotes · similarity 0.56
- Openstatus MCP Health Checker · ph · 2026-05-30 · 207 upvotes · similarity 0.52
- MCPHub · ph · 2026-09-06 · 5 upvotes · similarity 0.51
- MCPJam · hn · 2026-09-17 · 12 upvotes · similarity 0.50
- SerpApi MCP Server · hn · 2025-12-05 · 26 upvotes · similarity 0.49
- seo-console-mcp · ph · 2026-09-29 · 3 upvotes · similarity 0.48
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a dev tools tool for Sales yet.