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mcp-minecraft-forge

MCP server for Forge Minecraft modding documentation. Gives AI assistants direct access to Forge docs with structured search results.

Features

  • Documentation Search: Full-text search across all Forge versions (1.12.x - 1.21.x)

  • Structured Results: Returns title, category, URL, and content preview

  • Code Examples: Extracts code blocks separately for easy access

  • Multi-Version: Supports 12 Forge versions

  • Auto-Indexed: Documentation is automatically re-indexed weekly via GitHub Actions

  • Offline: Works completely offline after initial indexing

Related MCP server: mcmodding-mcp

Database Stats

  • 731 documents across 12 Forge versions (1.12.x - 1.21.x)

  • 4,536 searchable chunks (titles, sections, code blocks)

  • 1,750 code examples

Installation

From NPM

npm install -g @hayrem_/mcp-minecraft-forge

From GitHub

git clone https://github.com/Hayremyt/mcp-minecraft-forge.git
cd mcp-minecraft-forge
npm install -g

Configure Your AI Client

Add to your MCP client configuration:

{
  "mcp": {
    "forge": {
      "type": "local",
      "command": ["mcp-minecraft-forge"],
      "enabled": true
    }
  }
}

Available Tools

Tool

Description

search_forge_docs

Search Forge documentation with optional category and version filters

get_example

Get code examples for specific topics

explain_forge_concept

Get detailed explanation of Forge concepts

list_forge_versions

List all available Forge versions

get_database_stats

Get database statistics

Auto-Indexing

Documentation is automatically re-indexed every Sunday at 00:00 UTC via GitHub Actions.

Or locally:

npm run index-docs

Project Structure

mcp-minecraft-forge/
├── .github/workflows/index-docs.yml  # Weekly auto-indexing
├── data/
│   └── forge-docs.db                 # SQLite database (10 MB)
├── dist/                             # Compiled JavaScript
├── src/
│   ├── index.ts                      # MCP server entry
│   ├── services/
│   │   ├── database.ts               # SQLite operations
│   │   └── search-service.ts         # Search logic
│   └── tools/                        # MCP tool handlers
├── scripts/
│   ├── index-docs.ts                 # Documentation indexer
│   └── postinstall.js                # Post-install script
└── package.json

License

MIT

Available Tools

5 tools
explain_forge_conceptC

Get detailed explanation of Forge concepts.

ParametersJSON Schema
NameRequiredDescriptionDefault
conceptYesConcept to explain

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. It only says 'detailed explanation,' with no mention of side effects, authentication requirements, rate limits, or what constitutes a concept. Safety profile is not stated.

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?

The description is a single, clear sentence with no waste. However, it could be slightly more informative while remaining concise.

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?

Given the tool's simplicity (single parameter, no output schema, no annotations), the description is too minimal. It lacks examples, usage context, and behavioral information that would help an agent use it effectively.

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 description coverage is 100% (one parameter with 'Concept to explain'). The description adds no additional meaning beyond the schema, so the baseline score of 3 is appropriate. No examples or format details are provided.

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

Purpose4/5

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

The description 'Get detailed explanation of Forge concepts' clearly states the verb ('get detailed explanation') and the resource ('Forge concepts'). It distinguishes from sibling tools like search_forge_docs (searching docs), get_example (getting examples), etc.

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. The description does not mention when to choose this over search_forge_docs or get_example, nor does it provide context on prerequisites or limitations.

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

get_database_statsC

Get database statistics.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, and the description fails to disclose any behavioral traits such as read-only nature, performance impact, or whether it returns aggregated data. The description is too minimal to inform safe usage.

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. Appropriate for a zero-parameter tool.

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 no parameters and no output schema, the description is minimally sufficient but leaves the agent guessing what 'database statistics' entails. Could be improved with a brief list of example statistics.

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?

No parameters exist, so schema coverage is 100% by default. The description adds no extra meaning beyond the schema, so baseline 3 is appropriate.

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

Purpose4/5

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

The description 'Get database statistics' clearly states the action and resource, distinguishing it from sibling tools that focus on documents, examples, concepts, or versions. However, it could be more specific about which database or what kind of statistics.

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. No when/why/where context provided.

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

get_exampleB

Get code examples for Forge modding topics.

ParametersJSON Schema
NameRequiredDescriptionDefault
topicYesTopic
languageNoLanguagejava
minecraft_versionNoVersion

TDQS

B3.1/5.0
Behavior2/5

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

With no annotations provided, the description must fully disclose behavioral traits. It only states 'Get code examples', which is a read operation, but does not mention any caching, rate limits, error handling, result limits, or what happens if the topic is not found.

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?

The description is a single sentence of 7 words, very concise and front-loaded with the key action. However, it may be overly minimal for a tool with three parameters and no output schema, slightly reducing the score.

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?

Despite having 3 parameters, no output schema, and no annotations, the description is very brief. It does not explain what the response contains (e.g., code snippets), whether it returns one or multiple examples, or how the filtering works. The context is incomplete for effective use.

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 description coverage is 100%. The description adds no additional meaning beyond the schema's parameter descriptions (topic, language, minecraft_version). The baseline for high coverage is 3, and the description does not exceed this.

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 'Get code examples for Forge modding topics' uses a specific verb (Get) and resource (code examples), and distinguishes from sibling tools like search_forge_docs (which likely searches docs) and explain_forge_concept (which explains concepts). The purpose is clear and specific.

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 provided on when to use this tool versus alternatives. It does not mention prerequisites, when to prefer it over search_forge_docs or explain_forge_concept, or any context for using it.

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

list_forge_versionsB

List all available Forge versions.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

B3.4/5.0
Behavior2/5

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

With no annotations, the description must carry full burden. It only says 'list all available Forge versions' but doesn't disclose important behaviors like whether results are paginated, sorted, or if it's a read-only operation.

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 with no wasted words. It is appropriately concise for a tool with no parameters.

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?

Given no output schema and no annotations, the description should explain return values or other details. It only states the action, leaving the agent without information on what the tool returns or how it behaves.

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?

There are no parameters, so the baseline of 4 applies. The description adds no parameter info, but that is acceptable since no parameters exist.

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 'Forge versions'. It effectively distinguishes from sibling tools which have different purposes like searching docs or getting examples.

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 explicit guidance on when to use this tool versus alternatives. The description does not mention any context or exclusions, leaving the agent to infer usage from the name alone.

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

search_forge_docsB

Search Forge Minecraft modding documentation with FTS5 full-text search.

ParametersJSON Schema
NameRequiredDescriptionDefault
queryYesSearch query
categoryNoFilter by category
minecraft_versionNoFilter by version

TDQS

B3.1/5.0
Behavior2/5

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

No annotations provided, and the description lacks behavioral details such as case sensitivity, result ordering, pagination, or any side effects. FTS5 is mentioned but not explained.

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, efficient and to the point. Could benefit from a second sentence for context, but no redundancy.

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?

Given the lack of annotations and output schema, the description is too sparse. It doesn't mention result structure, ranking, or limitations, making it incomplete for an AI agent.

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%, and the parameter descriptions ('Search query', 'Filter by category', 'Filter by version') are clear. The description adds no extra meaning beyond the schema.

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 uses a specific verb 'Search' and resource 'Forge Minecraft modding documentation', clearly distinguishing it from sibling tools like get_example or explain_forge_concept.

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. The description is a bare one-liner without context about prerequisites, scope, or exclusion criteria.

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

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 5 tool updatesv0.4.0
    • First observedexplain_forge_concept
    • First observedget_database_stats
    • First observedget_example
    • First observedlist_forge_versions
    • First observedsearch_forge_docs

TDQS

B3.4/5.0
Disambiguation4/5

Most tools have distinct purposes: search, get example, explain concept, and list versions are clearly different. However, the get_database_stats tool seems unrelated to Forge modding, potentially causing confusion.

Naming Consistency5/5

All tool names follow a consistent verb_noun pattern using snake_case (e.g., search_forge_docs, list_forge_versions). The naming is predictable and clear.

Tool Count5/5

With 5 tools, the server is well-scoped for a documentation-focused MCP. Each tool contributes to the core functionality of exploring Forge modding resources.

Completeness4/5

The set covers key documentation tasks: searching, getting examples, explaining concepts, and listing versions. The get_database_stats tool is a minor outlier, and there is no tool for browsing or summarizing documentation, but core needs are met.

Maintenance

ActivitySlowing
ResponsivenessNo issues

Resources

Unclaimed servers have limited discoverability.

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