zfirsty/mcp-json-tools

3.2

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MCP JSON Tools provide powerful data manipulation and querying capabilities for local JSON and NDJSON files using Lodash and JSONPath.

Tools

Functions exposed to the LLM to take actions

mcp_json_query

Executes a JSONPath query on a local JSON or NDJSON file and returns an array of matching values. Reads both formats automatically; NDJSON is treated as an array of objects for querying. Syntax Note: Use $.path... for JSON objects and $[selector] (e.g., $[*] or $[?(...)]) for NDJSON arrays.

mcp_json_nodes

Executes a JSONPath query on a local JSON or NDJSON file and returns matching nodes (value + path). Reads both formats automatically; NDJSON is treated as an array of objects for querying. Syntax Note: Use $.path... for JSON objects and $[selector] (e.g., $[*] or $[?(...)]) for NDJSON arrays.

mcp_json_eval

Reads a JSON or NDJSON file, executes JavaScript code within a sandboxed VM with file content ($1, object for JSON, array for NDJSON), lodash (_), and jsonpath (jp). Returns the result OR modifies the file (preserving original format: JSON or NDJSON) if the code's last expression is { type: 'updateFile', data: <new_data> }. Do not use explicit return for the final result/update object; the last evaluated expression is used. Has a 30s timeout. WARNING: Executes user-provided code.

mcp_json_multi_eval

Reads multiple JSON or NDJSON files, executes JS code within a sandboxed VM with file contents ($1 is array of parsed contents), lodash (_), and jsonpath (jp). Returns the result OR modifies files (preserving original formats) if the code's last expression is { type: 'updateMultipleFiles', updates: [...] }. Do not use explicit return for the final result/update object; the last evaluated expression is used. Has a 30s timeout. WARNING: Executes user-provided code.