"Overview of HTTP (HyperText Transfer Protocol)" matching MCP connectors:

Registry of companies selling AI agents identity, phone, email, addresses, money, legal, insurance

Human Lineage MCP server — search and query the public genealogical graph of all humanity

BookBrainz MCP — open book metadata (MetaBrainz / sister of MusicBrainz)

Read-only MCP server for The Quiet Protocol's engines, benchmarks, proof, and business data.

A unified biomedical graph database that integrates 50+ primary data sources — genes, proteins, compounds, diseases, pathways, and clinical data — into a single queryable graph with billions of cross-reference edges. Its native MCP server gives LLMs direct access to structured, authoritative biomedical data, complementing their reasoning with reliable identifiers and up-to-date database content.

The BigQuery remote MCP server is a fully managed service that uses the Model Context Protocol to connect AI applications and LLMs to BigQuery data sources. It provides secure, standardized tools for AI agents to list datasets and tables, retrieve schemas, generate and execute SQL queries through natural language, and analyze data—enabling direct access to enterprise analytics data without requiring manual SQL coding.

Hosted Model Context Protocol gateway for PostgreSQL, MySQL, and OpenAPI with scoped access.

Remote ChromaDB vector database MCP server with streamable HTTP transport

Connecting LLMs and AI agents to real-time production data shouldn't mean writing endless boilerplate middleware. BoltSchema automatically converts your PostgreSQL into secure, production-ready, and hosted Model Context Protocol (MCP) servers. Save days of engineering time, handle JSON-RPC schemas automatically, and let your AI securely query the exact data context it needs in under 60 seconds.

Public read-only MCP HTTP gateway for the Solapur software developers registry.

The HubSpot MCP Server acts as a bridge that enables AI assistants and Large Language Models to securely interact with HubSpot CRM data through natural conversation, without requiring users to understand complex API structures. It provides read-only access to standard CRM objects (contacts, companies, deals, tickets, products, invoices, and more) and their associations, secured via OAuth 2.0, allowing AI agents to perform tasks like summarizing deals, fetching company updates, and looking up record changes.

Same functionality, consuming only 1/20 of the context window tokens.