A
licenseA
qualityC
maintenanceEnables efficient JSON file editing with targeted read, write, delete, and deep merge operations using dot notation paths, optimized for managing multilingual projects and large configuration files.
4
30 npm
1
MIT
json-tools
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@json-tools validate data.json against schema.json"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
@mcpx-digital/json-tools
MCP server for everyday JSON/JSONC work on local files and strings.
Validate JSON or JSONC, get/set values with jq-like paths, pretty-print or minify, validate against JSON Schema (Ajv), and diff two documents — from Cursor or any MCP client.
Local only. Tools accept file paths or inline strings. They do not fetch URLs, scrape the web, or call external APIs.
Install (MCPX / npx)
npx -y @mcpx-digital/json-toolsPrepared for npm as
@mcpx-digital/json-tools. Until published, run from a local clone.
Related MCP server: Universal JSON Agent MCP
Cursor mcp.json example
{
"mcpServers": {
"json-tools": {
"command": "npx",
"args": ["-y", "@mcpx-digital/json-tools"]
}
}
}Local clone:
{
"mcpServers": {
"json-tools": {
"command": "node",
"args": ["/absolute/path/to/json-tools-mcp/index.js"]
}
}
}Tools
Tool | What it does |
| Strict JSON parse/validate |
| JSONC (comments + trailing commas) |
| Get value at |
| Set value at path (optional write) |
| Pretty-print |
| Minify |
| Ajv JSON Schema validation |
| Line-oriented diff of two JSON docs |
Example prompts
“Validate this JSONC config and pretty-print it”
“Get
.dependencies.reactfrom package.json”“Diff these two API response fixtures”
“Validate data.json against schema.json”
Development
git clone https://github.com/TheoryofShadows/json-tools-mcp.git
cd json-tools-mcp
npm install
npm test
node index.jsSell / list on MCPX
Suggested listing price: $7.
Install command: npx -y @mcpx-digital/json-tools
License
MIT © TheoryofShadows
Available Tools
8 toolsdiff_jsonB
Diff two JSON documents (canonical key-sorted stringify, line-oriented). Local files/strings only. Does not fetch URLs or contact external services.
Inputs: jsonc, leftText, maxDiffs, rightText, +2 more.
json_getA
Get a value at a jq-like path (e.g. .foo.bar[0]). Local files/strings only. Does not fetch URLs or contact external services.
Inputs: path (required), text, filePath.
json_setA
Set a value at a jq-like path; returns updated JSON (optionally write file). Local files/strings only. Does not fetch URLs or contact external services.
Inputs: path (required), text, value, indent, +4 more.
minify_jsonA
Minify JSON to one line. Local files/strings only. Does not fetch URLs or contact external services.
Inputs: text, filePath, outputPath.
pretty_jsonB
Pretty-print JSON with indentation. Local files/strings only. Does not fetch URLs or contact external services.
Inputs: text, indent, filePath, outputPath.
schema_validateA
Validate JSON data against a JSON Schema using Ajv. Local files/strings only. Does not fetch URLs or contact external services.
Inputs: jsonc, dataText, schemaText, dataFilePath, +1 more.
validate_jsonA
Parse and validate strict JSON. Local files/strings only. Does not fetch URLs or contact external services.
Inputs: text, filePath.
validate_jsoncA
Parse JSONC (comments + trailing commas) and validate. Local files/strings only. Does not fetch URLs or contact external services.
Inputs: text, filePath.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
TDQS
A3.9/5.0
Scored across 8 tools
Disambiguation5/5
Each tool has a clearly distinct purpose: validation (strict vs JSONC), get/set by path, formatting (pretty/minify), schema validation, and diffing. No two tools overlap in functionality.
Naming Consistency4/5
Most tools follow a verb_noun pattern (validate_json, pretty_json, minify_json, diff_json), but json_get and json_set reverse the order to noun_verb, creating a minor inconsistency. Overall the pattern is readable and predictable.
Tool Count5/5
Eight tools cover a focused domain of JSON utilities without redundancy. This count is well-scoped for the server's purpose.
Completeness5/5
The tool surface covers the core lifecycle of JSON manipulation: validation, access, modification, formatting, schema checking, and comparison. No obvious gaps for the stated domain.
Maintenance
ActivitySlowing
ResponsivenessNo recent community issues
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