Json5
FreeNot checkedMCP server: parse and stringify JSON5 — relaxed JSON with comments and trailing commas.
About
MCP server: parse and stringify JSON5 — relaxed JSON with comments and trailing commas.
README
MCP server: parse and stringify JSON5. Use this when you've got a config file with comments, trailing commas, or unquoted keys that plain JSON would choke on.
Tools
parse
{ "text": "{ /* settings */ retries: 3, hosts: ['a', 'b'], }" }
→ { "value": { "retries": 3, "hosts": ["a", "b"] } }
Accepts the full JSON5 grammar: block + line comments, unquoted keys,
single-quoted strings, trailing commas, hex numbers, leading/trailing
decimal points, +Infinity, NaN.
stringify
{ "value": { "a": 1, "b": [2, 3] }, "indent": 2 }
→ JSON5 output (still valid JSON when indent=0).
Configure
{ "mcpServers": { "json5": { "command": "npx", "args": ["-y", "@mukundakatta/json5-mcp"] } } }
License
MIT.
Installing Json5
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/MukundaKatta/json5-mcpFAQ
Is Json5 MCP free?
Yes, Json5 MCP is free — one-click install via Unyly at no cost.
Does Json5 need an API key?
No, Json5 runs without API keys or environment variables.
Is Json5 hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Json5 in Claude Desktop, Claude Code or Cursor?
Open Json5 on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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