v1.2.0 - 20 Database Adapters

What's New

Added 4 new database adapters, bringing the total to 20 databases supported through a single MCP interface.

New Adapters

Database	Tools	Description
ArangoDB	13	Multi-model (document + graph + KV), AQL queries
Virtuoso	14	RDF triplestore, SPARQL, linked data
CouchDB	13	Document DB with HTTP REST API, Mango queries
Cassandra	12	Distributed wide-column store, CQL queries

Merged Projects

• arango-mcp → now integrated as adapters/arangodb.js
• virtuoso-mcp → now integrated as adapters/virtuoso.js

Full Database Support

Relational: PostgreSQL, MariaDB, SQLite
Document: MongoDB, SurrealDB, ArangoDB, CouchDB
Graph: Neo4j, Virtuoso
Wide Column: Cassandra
Cache/KV: Dragonfly/Redis, Memcached, LMDB
Search: Elasticsearch, Meilisearch
Vector: Qdrant
Time Series: InfluxDB
Analytics: DuckDB
Specialized: XTDB, iTop

Installation

claude mcp add polyglot-db -- deno run \
  --allow-net --allow-read --allow-write --allow-env \
  $(pwd)/index.js

Full Changelog: v1.0.0...v1.2.0