"Free PostgreSQL Database Solutions" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Validate and clean CSV before import. Find duplicates, missing values and invalid dates with row-level reports. Apply only the cleanup you request; files are not retained. Run view_csv_demo free without a key. Custom CSV: EUR 9 for 100 operations, valid 90 days, no subscription. Setup: https://check.orvel.dev/docs/
Paste-your-data analytics: CSV profiling, A/B tests, correlation, growth. 4 of 7 free.
SPX 0DTE dealer market structure: GEX, walls, gamma flip, regime, flow. Free preview; pay per read.
Validate CSV columns, find duplicates and invalid values, and clean files with explicit rules. Row-level reports, no stored files. Run the fixed free sample without a key. Custom CSV: EUR 9 for 100 operations, valid 90 days, no subscription. Setup: https://import-check-production.up.railway.app/docs/
Find new business owner contacts the morning the state posts a filing. Preview free, pay per record.
Database for your AI agent. Turn its output into data, docs, skills, and apps you can actually use.
Find novel, statistically validated patterns in tabular data — hypothesis-free.
Convert JSON to TOON (about 43% fewer LLM tokens) and TOON back to JSON. Free, no auth.
Convert and clean tables: CSV, JSON, dedupe, stats. Free.
Company hiring signals + open jobs from Greenhouse, Lever, Ashby boards, API + MCP. 20 free/day.
Fuzzy entity resolution and dedupe for names, addresses, and company records — the "is this the same person/company" problem that breaks exact-match joins. Clean CRM exports, merge duplicates, reconcile vendor lists. Pay-per-call via x402 (USDC on Base): $0.008/call, no account or API key. tools/list and /openapi.json are free for discovery.
Scans text for personally identifiable information — emails, phone numbers, SSNs, credit card numbers, physical addresses, names — and returns a redacted version. Built for agents sanitizing user content, support tickets, logs, or documents before storage, sharing, or feeding into another LLM call. Pay-per-call via x402 (USDC on Base): $0.01/call, no account or API key. tools/list and /openapi.json are free for discovery.
Self-hosted, open-source MCP gateway: turn any API, database or MCP server into custom connectors for Claude, ChatGPT, Gemini, Copilot & Cursor — no code. Converts REST, SOAP, WSDL, GraphQL & SQL to MCP, with OAuth2, RBAC & audit log. 175+ pre-built adapters. This is the public read-only demo endpoint — run your own at https://github.com/HelpCode-ai/anythingmcp
Harmonize Parquet schemas; ordinary unions are free, residual reconciliation is x402-gated.
Free to compete: testnet faucet funds everything. Rebuild true stock from messy ledgers.
Free, read-only MCP subset of x402 Toolbox's cheap data endpoints, free via MCP.
Sources in, feeds out: an open, ever-growing database of real-time public data, enriched.
smart-data-extractor MCP server on Cloudflare Workers · REST + MCP JSON-RPC · free tier
Read-only access to business data from Exact Online, Twinfield, AFAS, Nmbrs, Moneybird, HubSpot and 30+ other sources for ChatGPT, Claude and other MCP clients. DigiData syncs each source into a dedicated PostgreSQL database per customer; the MCP server exposes bounded tools (list_sources, list_tables, describe_table, query_table, aggregate_table, get_sync_status) over admin-approved tables and columns only. OAuth 2.1, no write tools, no arbitrary SQL.
- KyomiOAuthai.kyomi.app
AI data intelligence platform that brings your data warehouse, dashboards, monitoring, and accumulated business knowledge into any MCP client. Connects to BigQuery, Snowflake, PostgreSQL, MySQL, ClickHouse, Redshift, Databricks, SQL Server, and Azure Synapse.
