"Free PostgreSQL Database Solutions" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Official STRING database MCP server. Query for protein-protein interactions, enrichment, annotations, homology, and PPI networks.
Three public-data tools as MCP tools: building permits from 16 US city open-data portals on one schema (contractor leads, permit velocity); job postings from 9 ATS platforms (Greenhouse, Lever, Ashby, Workday, SmartRecruiters, Workable, Recruitee, Personio, Rippling) with company to ATS auto-discovery; and a free company ATS detector. Runs on Apify; send your Apify API token as a Bearer token. Pay per result, no subscription. https://makenomistakesllc.com
Free verified network knowledge for AI agents: deterministic answers, honest unknowns.
Hosted MCP server for Retro Diffusion. Generate authentic, grid-aligned pixel art — sprites, characters, animations, and tilesets — from Claude, Cursor, VS Code, Windsurf, or any MCP client. 90+ styles, free cost estimation, pay-per-generation with no subscription and credits that never expire.
