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fastCRW Pergamon
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Maven Central

central.sonatype.com

Java and JVM artifact metadata from Maven Central: coordinates, versions and packaging.

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Runs on your machine under the source's own terms

The crw MCP on your computer calls Maven Central directly. Calls cost no credits and the data does not pass through fastCRW. Install it once for Claude Code, Cursor, Codex, Windsurf, Gemini CLI or OpenCode, with your fastCRW API key in place of the placeholder:

Ask with this source

A prompt for your agent that names this source and how to call it through the crw MCP.

  • Popular libraries in a category

    Use Maven Central (maven) from fastCRW Pergamon, capability "Popular libraries in a category" (category). You need to discover which libraries exist for a subject area such as logging or JSON and which of them the Java ecosystem actually uses, rather than searching for a name you already know. Example options: category=JSON, page=0, size=20. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "maven" and capability "category". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>

  • Identify a jar by SHA-1

    Use Maven Central (maven) from fastCRW Pergamon, capability "Identify a jar by SHA-1" (checksum). You are holding an unidentified jar, or a lockfile entry with only a hash, and need to work out which Maven coordinate it actually is. Example options: sha1=03fcc0a259f724c7de54a6a55ea7e26d3d5c0cac, rows=20. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "maven" and capability "checksum". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>

  • Artifact overview

    Use Maven Central (maven) from fastCRW Pergamon, capability "Artifact overview" (component). You have Maven coordinates but no version, and want to know what this library is, what it is called upstream, which version is current and whether it is widely used. Example options: namespace=com.google.guava, name=guava. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "maven" and capability "component". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>

  • Who depends on this version

    Use Maven Central (maven) from fastCRW Pergamon, capability "Who depends on this version" (dependents). You want to judge the blast radius or real-world adoption of a library version - who downstream would break if it changed, and which of those consumers matter. Example options: namespace=org.jsoup, name=jsoup, version=1.18.1. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "maven" and capability "dependents". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>