"Open Collective" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Check Supabase SQL for who can read and write each table: RLS gaps, open policies, grants, fix SQL.
Check an Australian vehicle for open safety recalls by VIN. The index mirrors the federal vehicle recall register: 5,587 notices and 8.8 million VINs, refreshed hourly. Look up one VIN, check a batch, search by make and model, or read the full notice. Free, read-only, no authentication.
Every spreadsheet is a table: upload Excel, CSV, Parquet or JSON files and query them in SQL (Apache DataFusion), with joins across formats, schema and column statistics. Hosted tableski server; connect with your tableski.io access token. Open source: github.com/yarenty/tableski
It connects with Smart Data models database with more than 1000 open licensed data models and helps you to create applications and systems interoperable with existing standards or real applications
Read and write Rowflare bases (open-source Airtable alternative): records, tables, fields, totals.
Search, sample and query open reproducible datasets published as immutable Parquet with schemas.
AI access to Quadratic spreadsheets: open files, run Python/SQL, query connected databases.
Remote MCP access to the p-e relay store. Reads are open; writes and waits are signed.
OQMD (Open Quantum Materials Database) MCP.
Crystallography Open Database (COD) MCP.
BookBrainz MCP — open book metadata (MetaBrainz / sister of MusicBrainz)
Query your Postgres from ChatGPT or Claude without exposing the database or handing over credentials. Run npx boltschema connect next to your database and it dials out over HTTPS — no inbound firewall rule, no open port, works with localhost and VPC-private databases. Read-only is enforced by a SQL guard, a Postgres READ ONLY transaction, and a scoped role generated for you.
Labor times, torque specs, fluid capacities, DTC codes and battery specs for vehicles 1955-present.
Search and open investor records: family offices, VCs, funds of funds, permanent capital, RIAs.
