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Memory tools that work with Codex
Every tool below names Codex in its own documentation. That's what the vendor says, not something we tested. Each page links to the source.
17 tools · docs checked 2026-11-09
| Tool | Works with (per docs) | Runs | Transport | License |
|---|---|---|---|---|
| MCP Memory Service (doobidoo) Persistent memory for agent pipelines and chat clients: REST API, knowledge graph and autonomous consolidation, with remote MCP over OAuth. | Claude Desktop, Claude Code, Claude (web), ChatGPT, Cursor, Codex, VS Code / Copilot, Windsurf, Gemini CLI, Zed, OpenCode | Local or hosted | stdio, Streamable HTTP | Apache-2.0 |
| Supermemory Memory and context engine with an app, API and MCP; hosted, with a documented fully-local mode. | Claude Desktop, Cursor, Windsurf, VS Code / Copilot, Claude Code, OpenCode, Codex | Local or hosted | Streamable HTTP | MIT |
| LongMemory (CaviraOSS, formerly OpenMemory) moved Local persistent memory store with MCP, HTTP API and session import from many coding agents. | ChatGPT, Claude Code, Codex, VS Code / Copilot, Gemini CLI, Cline, OpenCode | Runs locally | stdio, Streamable HTTP | Apache-2.0 |
| Hindsight Agent memory that learns: self-hosted server with per-bank MCP endpoints and native coding-agent installers. | Claude Code, Codex, Cursor, Cline, OpenCode, Zed | Local or hosted | Streamable HTTP | MIT |
| Honcho Memory library and service for stateful agents, with a hosted MCP at mcp.honcho.dev and self-hosting. | Claude Code, Cursor, Codex, Windsurf, Cline, OpenCode | Local or hosted | Streamable HTTP | AGPL-3.0 |
| Basic Memory Notes-as-memory: your AI reads and writes plain Markdown files you can open in Obsidian, indexed locally. | ChatGPT, Claude Desktop, Claude Code, Cursor, Codex, VS Code / Copilot | Local or hosted | stdio, Streamable HTTP | AGPL-3.0 |
| MemoryPlugin Hosted shared memory across ChatGPT, Claude, Cursor and 20+ AI tools via browser extension, apps and a remote MCP server; paid, with a 7-day trial. | ChatGPT, Claude (web), Claude Desktop, Claude Code, Cursor, Codex | Hosted | Streamable HTTP, SSE | Proprietary |
| claude-mem Captures what your coding agent does, compresses it and injects relevant context into future sessions. | Claude Code, Codex, Cursor, OpenCode, Claude Desktop | Runs locally | Unknown | Apache-2.0 |
| memU Personal memory across agents, with CLIs (including a Codex CLI) and hosted or local storage. | ChatGPT, Claude Code, Cursor, Codex, VS Code / Copilot | Local or hosted | Unknown | Unknown |
| Zep Hosted context layer for agents (Zep Cloud). The GitHub repo holds examples and integrations, not the service. | Claude Desktop, ChatGPT, Claude Code, Codex, Cursor | Hosted | Unknown | Apache-2.0 |
| MemPalace Open-source local AI memory system with pluggable retrieval (ChromaDB by default) and auto-save hooks for coding agents. | Claude Code, Cursor, Codex, Gemini CLI | Runs locally | stdio, Streamable HTTP | MIT |
| OpenViking Context database for agents from Volcengine that unifies agent memory, knowledge retrieval and skills. | Claude Code, Cursor, Codex, OpenCode | Local or hosted | Streamable HTTP | AGPL-3.0 |
| EverOS (formerly EverMemOS) moved Local-first, Markdown-native memory layer for agents, with a cloud option and an MCP package (everos-mcp). | Claude Code, Codex, Claude Desktop, Cursor | Local or hosted | Unknown | Apache-2.0 |
| Memori LLM-agnostic memory layer turning agent execution into structured persistent state; hosted MCP for coding agents. | Claude Code, Cursor, Codex | Local or hosted | Streamable HTTP | Unknown |
| memsearch Unified memory for coding agents from Zilliz: Markdown files are the source of truth, indexed in Milvus, with plugins per agent. | Claude Code, Codex, OpenCode | Runs locally | Unknown | MIT |
| ReMe Memory management kit for agents from the AgentScope team, with plugins for coding agents. | Claude Code, Codex | Runs locally | Unknown | Apache-2.0 |
| C.O.R.E. (RedPlanetHQ) Self-hostable "personal AI OS" with memory shared across coding agents and 50+ app integrations via MCP. | Claude Code, Codex | Local or hosted | Unknown | Unknown |
Client support is what each vendor's docs say. MemoryStack doesn't test tools. How to share one memory across your bots.