Google Knowledge Graph

houtini-ai/google-knowledge-graph-mcp

Connects Claude to Google's free Knowledge Graph Search API for structured entity lookups. You get two tools: query based search that returns entities by name with type filtering and result limits, and direct MID lookup if you already have Google's machine identifiers. Returns JSON with entity types, descriptions, Wikipedia URLs, images, and relevance scores. The Knowledge Graph API is genuinely free with no billing account required, which makes this a zero cost option for entity verification and research workflows. Useful when you need Claude to distinguish between ambiguous entities (Python the language versus Python the snake) or pull canonical information about people, places, organizations, and concepts from Google's database.

GitHub stars: 13
tools: 2
auth: Secret needed
transport: STDIO
env var: 1
last updated: Oct 24, 2026

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Tools

2 tools

Public tool metadata for what this MCP can expose to an agent.

search_knowledge_graphSearch for entities by name or description. Returns structured data including entity types, descriptions, Wikipedia URLs, and relevance scores.

Search for entities by name or description. Returns structured data including entity types, descriptions, Wikipedia URLs, and relevance scores.

No parameter schema in public metadata yet.

lookup_knowledge_graph_entitiesIf you already have Machine IDs (Google's internal entity identifiers), look them up directly. Useful for entity resolution workflows.

If you already have Machine IDs (Google's internal entity identifiers), look them up directly. Useful for entity resolution workflows.

No parameter schema in public metadata yet.