The real catalog of tools for AI agents

Self-maintaining knowledge vault: figure-level search, auto-wikilinks, and memory compression.

Your own notes, searched and cited by your AI — local-only, allowlist-gated, capped, and logged.

Second brain en Obsidian: notas, conceptos como nodos, resurfacing y salud del grafo. En castellano.

Search and reason over your Obsidian-style Markdown vault, right from ChatGPT.

Query one person's second brain: contacts, companies, notes, files and connected accounts.

Recall (recall.it) — your AI knowledge base / 'second brain'. Via the official API: semantic search

The second brain your AI agents share. It builds itself from your work and keeps itself current.

A searchable second brain for AI agents: ranked keyword and semantic search over your Markdown.

Local-first second brain with semantic search. Markdown notes indexed by a local ML model.

Company brain for AI agents — temporal knowledge graph search, exploration, and durable memory.

AI knowledge graph for architecture, portfolio, and digital strategy management.

Gene expression experiments and the brain structure ontology from the Allen Institute's Brain…

Repository knowledge graph MCP server for codebase understanding and debugging.

UTC second

Cited company knowledge from Slack, meetings, transcripts, and decisions

A business's marketing memory: campaigns, results, decisions, brand and audience knowledge.

Free: turn your AI chats into spaced-repetition vocabulary. 13 tools, reads and writes.

Governed company memory: search decisions, rules and client facts; propose updates for review.

Expert knowledge base for sales, negotiation, strategy, operations, and risk.

Personal wiki and memory layer for AI assistants. Persistent, structured memory across sessions.