"An overview of knowledge graphs" matching MCP connectors:

Analytical memory for AI agents: a real Postgres queried in plain English over MCP. One command.

AMZScout Skill + MCP gives AI agents live access to real Amazon marketplace data across 14 Amazon marketplaces. Analyze any ASIN, validate product ideas, research niches, compare competitors, discover profitable keywords, and build data-driven PPC strategies using trusted Amazon insights instead of AI assumptions. Works with Claude, ChatGPT, Cursor, and any other MCP-compatible AI client. To connect, you'll need an AMZScout API plan and authorize your account. Get access and view pricing here: https://learn.amzscout.net/amazon-product-api-for-ai-agents

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

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

Read-only analytics for Convex apps, queryable via MCP from Claude, Cursor, and other clients.

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.

Connect your AI to your Well financial data - invoices, companies, contacts.

VaultCrux Memory Core — 32 tools: knowledge, decisions, constraints, signals, coverage

Query and join across SaaS tools, SQL, and NoSQL databases through one unified SQL interface.

PostgreSQL, MySQL, OpenAPI/Swagger, and shared Agent Memory with scoped access.

Butterbase MCP server — manage your backend: schemas, auth, functions, storage, RAG, deploys.

Backend for vibe coders. Connect Butterbase to any MCP-compatible AI coding tool and provision a full backend automatically — database, authentication, file storage, edge functions, and real-time — from a natural language prompt. No SQL, no configuration, no backend knowledge required. Free to start at butterbase.ai.

An MCP server for converting data between 16 formats including JSON, YAML, TOML, CSV, XML, Markdown, HTML, Excel, PDF, and more. Supports single transforms, batch fan-out to multiple targets in one call, and JSON reshaping with dot-notation path mapping. 240 conversion pairs, zero config.

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.

A collaborative substrate over your data: vector, knowledge graph, SQL, geospatial, streaming.

Assemble a reporting export row

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

Bring Kubit into your AI workflow — query your warehouse with natural language

Comprehensive Salesforce administration and management