ANTLR4 MCP Server

Name: antlr4-mcp-server
Availability: InStock
Rating: 3.0 (5 reviews)

MCP server enabling AI assistants to help with ANTLR4 grammar development.

Quick Start

docker pull sshailabh1/antlr4-mcp-server:latest

Configure your MCP client:

{
  "mcpServers": {
    "antlr4": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "sshailabh1/antlr4-mcp-server:latest"]
    }
  }
}

./mvnw clean package -DskipTests

{
  "mcpServers": {
    "antlr4": {
      "command": "java",
      "args": ["-jar", "/path/to/antlr4-mcp-server-0.2.0.jar"]
    }
  }
}

Tool	Purpose
`validate_grammar`	Syntax validation with error suggestions
`parse_sample`	Parse input, return tree (interpreter mode)
`detect_ambiguity`	Find parsing ambiguities
`analyze_left_recursion`	Detect recursion patterns
`analyze_first_follow`	Compute FIRST/FOLLOW sets
`analyze_call_graph`	Rule dependencies, cycles, unused rules
`visualize_atn`	ATN state diagrams (DOT/Mermaid)
`compile_grammar_multi_target`	Generate parsers (10 languages)
`profile_grammar`	Performance profiling

Validate and parse "2 + 3 * 4":

grammar Calc;
expr: expr ('*'|'/') expr | expr ('+'|'-') expr | NUMBER ;
NUMBER: [0-9]+ ;
WS: [ \t\r\n]+ -> skip ;

Java, Python, JavaScript, TypeScript, C++, C#, Go, Swift, PHP, Dart

Constraint	Value
Max grammar size	10 MB
Max input size	1 MB
Timeout	30 seconds
Imports	Not supported (inline all rules)

Apache License 2.0