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shk1447

ripgrep-mcp

by shk1447

Ripgrep MCP Server

An MCP server that provides ripgrep (rg) search capabilities to any MCP client such as Claude.

Overview

This server provides a Model Context Protocol (MCP) interface for the powerful ripgrep search tool. It enables Claude AI and other MCP-compatible clients to perform high-performance text searches across files on your system.

Related MCP server: Greply MCP Server

Prerequisites

  • Node.js (v18 or higher)

  • ripgrep (rg) command installed and available in your PATH. Install it with brew install ripgrep on macOS.

Usage with Claude for Desktop

To use this MCP server with Claude for Desktop:

  1. Edit your Claude for Desktop configuration file:

    • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

    • Windows: %APPDATA%\Claude\claude_desktop_config.json

  2. Add the following to your configuration:

    {
      "mcpServers": {
        "ripgrep": {
          "command": "npx",
          "args": ["-y", "ripgrep-mcp@latest"]
        }
      }
    }

    Replace /path/to/ripgrep-mcp with the absolute path to where you cloned this repository.

  3. Restart Claude for Desktop.

Available Tools

Basic search with ripgrep:

Pattern: error
Path: ./src

More advanced search with additional options:

Pattern: function
Path: ./src
FixedStrings: true
FileType: ts
IncludeHidden: false

count-matches

Count occurrences of a pattern:

Pattern: TODO
Path: ./src
CountLines: true

list-files

List files that would be searched without actually searching them:

Path: ./src
FileType: js

list-file-types

List all supported file types in ripgrep.

Security Considerations

This MCP server executes the ripgrep binary on your machine. It passes arguments directly to rg without shell command string construction, but you should still use caution when providing paths and patterns because searches run against your local filesystem.

License

MIT

Available Tools

5 tools
count-matchesB

Count matches in files using ripgrep

ParametersJSON Schema
NameRequiredDescriptionDefault
patternYesThe search pattern (regex by default)
pathYesDirectory or file(s) to search.
caseSensitiveNoUse case sensitive search (default: auto)
filePatternNoFilter by file type or glob
countLinesNoCount matching lines instead of total matches
useColorsNoUse colors in output (default: false)

TDQS

B3.1/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries full burden but only states the basic function. It fails to disclose behavioral details such as regex handling, line count vs match count behavior, or output format.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence, no wasted words. Could benefit from slight expansion to include core purpose, but it is efficient.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with 6 parameters and no output schema, the description is too minimal. Missing return format, error cases, and how it differs from sibling tools.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so baseline is 3. The description adds no additional parameter-level context beyond what the schema already provides.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool counts matches in files and names the underlying engine (ripgrep). It distinguishes from siblings like 'search' which likely returns matches rather than counts.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives like 'search' or 'advanced-search'. No mention of prerequisites, performance considerations, or limitations.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

list-filesA

List files that would be searched by ripgrep without actually searching them

ParametersJSON Schema
NameRequiredDescriptionDefault
pathYesDirectory or file(s) to search.
filePatternNoFilter by file type or glob
fileTypeNoFilter by file type (e.g., js, py)
includeHiddenNoInclude hidden files and directories

TDQS

A3.9/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full burden. It discloses the key non-searching behavior, but lacks details on other behaviors like symlink handling or .gitignore respect, which would be expected from a ripgrep-based tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence that is front-loaded with the key action. Every word serves a purpose with no redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the presence of sibling tools and 4 parameters, the description explains the core purpose well but lacks details about output format, filtering nuances, or potential limitations. Adequate but with gaps.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% with each parameter described. The description adds overarching context about ripgrep behavior but does not add significant detail beyond the schema. Baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool lists files that ripgrep would search, with the unique aspect of not actually searching. This distinguishes it from sibling tools like 'search' which perform actual searches.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies use for previewing search scope via 'without actually searching them', but does not explicitly mention when to use alternatives or provide exclusion criteria. Context is clear but lacks direct guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

list-file-typesA

List all supported file types in ripgrep

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

A4.1/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries full burden. It correctly implies a read-only enumeration with no side effects. For a simple list operation, this is transparent enough.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, well-structured sentence with no extraneous words. It earns its place by being informative yet brief.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (no parameters, no output schema, distinct siblings), the description fully conveys the tool's purpose without needing additional detail.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has zero parameters, so the baseline is 4. The description adds no parameter info, which is fine since there are none.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'list' and the resource 'supported file types in ripgrep'. It distinguishes from sibling tools like 'search' and 'list-files' by focusing specifically on file type enumeration.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is given on when to use this tool versus alternatives. There is no mention of context, prerequisites, or exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

TDQS

A3.6/5.0
Disambiguation5/5

Each tool has a distinct purpose: basic search, advanced search, counting matches, listing files, and listing file types. No overlap in functionality.

Naming Consistency4/5

Most tools follow a verb_noun pattern with hyphens (count-matches, list-files, list-file-types). 'search' is a single verb and 'advanced-search' is adjective_noun, but the pattern is still clear and predictable.

Tool Count5/5

With 5 tools, the server covers core ripgrep features without being too narrow or bloated. The count is well-suited for the domain.

Completeness4/5

The tool set covers search, counting, file listing, and file type listing. A minor gap might be the lack of a tool for grep-like context lines, but core workflows are well-supported.

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

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