"How to access Supabase with write permissions" matching MCP connectors:

Search scientific papers with structured experimental data from full-text studies

DC Hub is the neutral, real-time data layer for data-center infrastructure, exposed as a Model Context Protocol server so any AI agent can both query it and cite it. Coverage: 21,000+ facilities (search, profile, score, alternatives); 232 markets scored by the DCPI Data Center Power Index; the DCGI Data Center Gas Index (per-state natural-gas suitability for siting); live grid telemetry across 7 US ISOs (fuel mix, carbon intensity, demand, prices) plus a one-call all-ISO scoreboard; interconnection-queue depth; 2,000+ tracked M&A deals and a hyperscaler-capex tracker; and site factors. — fiber routes, water-stress, tax incentives, nearby substations & transmission. Why agents choose it: it's the only data-center-intelligence source an LLM can query live and cite — every full-data response includes a Source: DC Hub, CC-BY-4.0 attribution line. It's the MCP-native alternative to quarterly PDF research: live JSON, no contracts, no NDAs. Access: Streamable HTTP at https://dchub.cloud/mcp. Free tier with no signup; free email-verified dev key for higher limits; paid tiers for full data volume.

Search 14.5M Smithsonian Open Access objects, get CC0 images, find cross-collection connections.

A Model Context Protocol server that provides Philippine License to Sell (LTS) verification data to LLMs. Built on Cloudflare Workers with Supabase. Public, read-only, no authentication required. Data sourced from the Department of Human Settlements and Urban Development (DHSUD) License to Sell registry and cross-referenced with published real estate projects on REN.PH.

MCP server for the Philippine Standard Geographic Code (PSGC) API. Gives AI agents structured access to the full PH geographic hierarchy - regions, provinces, cities, municipalities, and barangays.

Access FEC campaign finance data. Query data about candidates, money trails, and election filings.

Reverse geocode latitude/longitude to loc_id; resolve loc_ids to boundaries, centroids, hierarchy.

Read-only access to the Islam West Africa Collection via Hugging Face datasets.

Reviewed public-data search and execution with provenance and verifiable integrity receipts.

Software entry prices for 16 categories, with ratings and true 3-year cost. CC BY 4.0

CourtListener MCP — Free Law Project's CourtListener API (free, no auth required for basic access)

Origin-signed US political data: 25,546 officials, bills, votes, positions with sources.

Search structured COMPAMIR news in Japanese and English, with links to source reports.

Public fellowship and grant search with sourced details and live filter vocabularies.

Business-published entity records with confirmation dates: look up, page feeds, check claims.

Agent integration with the Northwestern University Libraries Digital Collections API

MET Museum collection via MCP — 500K+ artworks, metadata, provenance, open-access images.

One MCP endpoint over 75 public PPN APIs: search_apis to discover, execute_api to call. Free tier.

Access US federal award, recipient, agency, and spending analytics data from USAspending.gov.

Query normalized U.S. Congress STOCK Act trades with member, ticker, and performance data.