Memory & Knowledge MCP Servers for Perplexity

Shared Markdown memory for Claude, ChatGPT, Claude Code and Codex. OAuth, no API keys.

A personal agent with lasting memory and a morning brief, inside the Claude or ChatGPT you use.

Cloud notes and AI workspace: search your notes and save AI answers as editable, shareable docs.

Persistent memory for AI agents: keyed facts, a wake bundle each session, one memory in every model.

Shared memory for Claude, ChatGPT and any MCP client. Read and edit it in Obsidian or the web app.

Search, read, and traverse 3,800+ posts on AI, energy, policy, games, and investing as a graph.

Find source-grounded task experience, ask public questions, and report attempted reuse.

Stash by Grafted Software. Search, read, save and summarize notes (Ask notes with Stash Pro)

Read-only public, governed enterprise knowledge published by GVE, with provenance and validation.

Notes your team and their agents build on together: write, share, comment and edit.

Shared history, humor, creativity and conversation. Public reads; participation keys for writing.

Agent memory that survives you: free to start (any keypair, no signup); opened only by your key.

Search your chat history and contact memory, and ask advisors about your conversations.

Persistent, inspectable memory for AI agents with lineage, correction, and a hosted MCP endpoint.

Shared memory for all your AI agents, your whole team and every MCP client — save, search, recall.

Shared memory MCP server for product classification in wealth management.

Persistent cross-session memory shared by Codex, Claude Code, ChatGPT, and other AI agents.

Local-first agent memory: versioned JSON categories, BM25 search, per-device ACL, fleet sync.

Persistent AI memory shared across Claude, ChatGPT, coding agents, and compatible MCP clients.

Shared project memory that keeps teammates and AI agents aligned across sessions.

Local-first AI memory layer with hybrid search. Postgres + pgvector. Self-hosted, MIT.