Gradle-accurate JVM classpath; fetch Java source, signatures, and class structure for agents.
Connect Runs on your machine
claude mcp add jvmsrc -e JVMSRC_ALLOWED_ROOTS=<JVMSRC_ALLOWED_ROOTS> -e JVMSRC_CACHE_ROOT=<JVMSRC_CACHE_ROOT> -e JVMSRC_LOG_DIR=<JVMSRC_LOG_DIR> -e JVMSRC_MAX_SOURCE_OUTPUT_CHARS=<JVMSRC_MAX_SOURCE_OUTPUT_CHARS> -e JVMSRC_GRADLE_TIMEOUT_MS=<JVMSRC_GRADLE_TIMEOUT_MS> -e JVMSRC_CFR_PATH=<JVMSRC_CFR_PATH> -- npx -y [email protected]{
"mcpServers": {
"jvmsrc": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"JVMSRC_ALLOWED_ROOTS": "<JVMSRC_ALLOWED_ROOTS>",
"JVMSRC_CACHE_ROOT": "<JVMSRC_CACHE_ROOT>",
"JVMSRC_LOG_DIR": "<JVMSRC_LOG_DIR>",
"JVMSRC_MAX_SOURCE_OUTPUT_CHARS": "<JVMSRC_MAX_SOURCE_OUTPUT_CHARS>",
"JVMSRC_GRADLE_TIMEOUT_MS": "<JVMSRC_GRADLE_TIMEOUT_MS>",
"JVMSRC_CFR_PATH": "<JVMSRC_CFR_PATH>"
}
}
}
}{
"mcpServers": {
"jvmsrc": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"JVMSRC_ALLOWED_ROOTS": "<JVMSRC_ALLOWED_ROOTS>",
"JVMSRC_CACHE_ROOT": "<JVMSRC_CACHE_ROOT>",
"JVMSRC_LOG_DIR": "<JVMSRC_LOG_DIR>",
"JVMSRC_MAX_SOURCE_OUTPUT_CHARS": "<JVMSRC_MAX_SOURCE_OUTPUT_CHARS>",
"JVMSRC_GRADLE_TIMEOUT_MS": "<JVMSRC_GRADLE_TIMEOUT_MS>",
"JVMSRC_CFR_PATH": "<JVMSRC_CFR_PATH>"
}
}
}
}{
"servers": {
"jvmsrc": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"JVMSRC_ALLOWED_ROOTS": "<JVMSRC_ALLOWED_ROOTS>",
"JVMSRC_CACHE_ROOT": "<JVMSRC_CACHE_ROOT>",
"JVMSRC_LOG_DIR": "<JVMSRC_LOG_DIR>",
"JVMSRC_MAX_SOURCE_OUTPUT_CHARS": "<JVMSRC_MAX_SOURCE_OUTPUT_CHARS>",
"JVMSRC_GRADLE_TIMEOUT_MS": "<JVMSRC_GRADLE_TIMEOUT_MS>",
"JVMSRC_CFR_PATH": "<JVMSRC_CFR_PATH>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
JVMSRC_ALLOWED_ROOTSOptional | Optional comma-separated absolute paths; only these project roots are allowed. |
JVMSRC_CACHE_ROOTOptional | Optional absolute path for resolution and decompile caches (default: OS cache dir). |
JVMSRC_LOG_DIROptional | Optional absolute path for failure diagnostic logs. |
JVMSRC_MAX_SOURCE_OUTPUT_CHARSOptional | Max characters returned for full-file source (default 524288). |
JVMSRC_GRADLE_TIMEOUT_MSOptional | Gradle resolution subprocess timeout in milliseconds. |
JVMSRC_CFR_PATHOptional | Optional path to a custom CFR JAR for decompilation. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 8 Sep 2026 |
| Last updated | 8 Sep 2026 |
| Registry name | io.github.Sintexer/jvmsrc |
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