Json5
FreeNot checkedParse JSON5 (comments, trailing commas, unquoted keys) and emit strict JSON.
About
Parse JSON5 (comments, trailing commas, unquoted keys) and emit strict JSON.
README
Fourteen small MCP servers for everyday LLM / RAG / agent work. Each ships independently on npm, listed in the official MCP Registry, and is callable from Claude Desktop, Cursor, Cline, Windsurf, Zed, and any other MCP-compatible client.
RAG / agent helpers
| Package | Tools | When to install |
|---|---|---|
| @mukundakatta/promptbudget-mcp | truncate_to_token_budget |
LLM needs to fit text into a context window mid-task |
| @mukundakatta/citecite-mcp | inject_citations, parse_citations, strip_citations |
Round-trip [1] [2] markers in RAG outputs |
| @mukundakatta/ragmetric-mcp | recall_at_k, hit_at_k, mrr, ndcg_at_k, evaluate_batch |
LLM helps score retrieval quality |
| @mukundakatta/ragdrift-mcp | interpret_drift_score, recommend_thresholds, explain_drift_dimensions |
LLM diagnoses RAG drift alerts |
Reliable transforms LLMs reach for tools instead of imagining
| Package | Tools | When to install |
|---|---|---|
| @mukundakatta/csv-tools-mcp | parse_csv, to_csv, pluck_columns |
LLM needs RFC 4180-correct CSV (quoted fields, embedded commas, BOMs) |
| @mukundakatta/regex-test-mcp | test_regex, find_all, replace |
LLM needs exact regex semantics with real match offsets and named groups |
| @mukundakatta/jmespath-mcp | json_query |
LLM needs deep JSON traversal (filters, projections, pipes) without hallucinating |
| @mukundakatta/diff-mcp | unified_diff, apply_patch, parse_patch |
Code-review or code-edit agent needs character-precise patches |
| @mukundakatta/sqlfmt-mcp | format_sql, list_dialects |
Deterministic SQL formatting across 19 dialects |
| @mukundakatta/shellquote-mcp | quote_bash, quote_bash_argv, quote_cmd, quote_powershell |
Safe shell argument escaping; LLMs constantly mishandle quotes/$VAR |
| @mukundakatta/json5-mcp | parse_json5, to_json5, to_strict_json |
LLM emitted JSON-with-comments / trailing-commas; round-trip to strict JSON |
| @mukundakatta/toml-yaml-json-mcp | parse, format, convert |
TOML / YAML / JSON conversion (LLMs especially mishandle TOML) |
| @mukundakatta/timezone-mcp | convert_tz, now_in, tz_offset |
IANA timezone math with real DST rules; LLMs hallucinate offsets |
| @mukundakatta/html-to-markdown-mcp | html_to_md, extract_text |
Web-scraping agents need clean Markdown / text from HTML |
Sibling libraries
The first four wrap or re-implement logic from the user's Rust + Python work:
- ragdrift (crates.io) / ragdrift-py (PyPI) — five-dimensional drift detection
- embedrank, promptbudget, stopstream, citecite, ragmetric — pure-Rust crates from the rust-llm-stack workspace
The MCP servers are independent: they implement the logic they need in plain JavaScript so installing them doesn't pull a Rust toolchain.
Install (any of them)
Add to your MCP client config. Example for Claude Desktop:
{
"mcpServers": {
"promptbudget": { "command": "npx", "args": ["-y", "@mukundakatta/promptbudget-mcp"] },
"citecite": { "command": "npx", "args": ["-y", "@mukundakatta/citecite-mcp"] },
"ragmetric": { "command": "npx", "args": ["-y", "@mukundakatta/ragmetric-mcp"] },
"ragdrift": { "command": "npx", "args": ["-y", "@mukundakatta/ragdrift-mcp"] },
"csv-tools": { "command": "npx", "args": ["-y", "@mukundakatta/csv-tools-mcp"] },
"regex-test": { "command": "npx", "args": ["-y", "@mukundakatta/regex-test-mcp"] },
"jmespath": { "command": "npx", "args": ["-y", "@mukundakatta/jmespath-mcp"] },
"diff": { "command": "npx", "args": ["-y", "@mukundakatta/diff-mcp"] },
"sqlfmt": { "command": "npx", "args": ["-y", "@mukundakatta/sqlfmt-mcp"] },
"shellquote": { "command": "npx", "args": ["-y", "@mukundakatta/shellquote-mcp"] },
"json5": { "command": "npx", "args": ["-y", "@mukundakatta/json5-mcp"] },
"toml-yaml-json": { "command": "npx", "args": ["-y", "@mukundakatta/toml-yaml-json-mcp"] },
"timezone": { "command": "npx", "args": ["-y", "@mukundakatta/timezone-mcp"] },
"html-to-md": { "command": "npx", "args": ["-y", "@mukundakatta/html-to-markdown-mcp"] }
}
}
Develop
git clone https://github.com/MukundaKatta/mcp-stack
cd mcp-stack
npm install
npm test --workspaces
License
MIT OR Apache-2.0.
Install Json5 in Claude Desktop, Claude Code & Cursor
unyly install json5-mcpInstalls into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.
First time? Get the CLI: curl -fsSL https://unyly.org/install | sh
Or configure manually
Run in your terminal:
claude mcp add json5-mcp -- npx -y @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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