"Techniques to Improve Agent Programming" matching MCP connectors:

Auto-discover validation rules from data — scan, profile, health-score. No rules to write.

Pre-computed market data that improves agent reasoning, reduces token usage, and replaces pipelines.

Buy timestamped web, company, commerce, social, document and decision data via x402.

Bounded data, document, web-quality, and operations services purchased with USDC through x402.

Document-to-Markdown MCP server — convert PDF, Office and HTML into LLM-ready Markdown.

Excel analytics: inspect, query (JSON rows), charts, and JSON-to-xlsx workbook writing.

AI access to Quadratic spreadsheets: open files, run Python/SQL, query connected databases.

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

Connect your Nubank account to AI via Brazil's Open Finance: balances, statements, cards, investment

Real-time Amazon data API built for AI agents. 200M+ products, 1B+ reviews, live BSR, pricing, and competitor data as clean JSON. 10 agent skills for market research, competitor monitoring, pricing analysis, and listing audits.

Map messy columns to a known schema — 7 scorers, domain dictionaries, F1 0.84. Zero config.

One command to validate, transform, and deduplicate — chain GoldenCheck + Flow + Match.

Chrysai provides a hosted MCP server for AI-driven data operations. After connecting an MCP client to the endpoint, you can use MCP tools such as create_app, list_apps, read_data, write_data, update_data, delete_data, and update_app, plus schema resources, to manage persistent structured data through natural language.

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.

Connect your AI to all your data - 200+ sources, intelligently filtered, compliance-ready.

Connect your AI assistants to Keboola and expose your data, transformations, SQL queries, ...

Move a database between providers, or convert MySQL to PostgreSQL, with integrity verified.

Deterministic bank-statement parsing: messy CSV/OFX to clean categorized rows. In-memory only.

Provides access to live sports data and analytics from BALLDONTLIE: The Sports API

Deterministic bank-statement parsing for AI agents: messy CSV/OFX exports to clean, categorized ledger rows. In-memory only, no storage, no external calls. Free tier: 50 requests/month.