Open-source SDK from LangChain that gives LangGraph agents long-term memory (extraction, search, prompt optimization) in your own store.
Pricing: Free open-source; runs in your infra on your existing LangGraph store (Postgres/SQLite/in-memory); managed service on waitlist
Instant self-serve — free signup gives a key immediately (a human unblocks an agent in under 2 minutes).
No signup or API key exists at all — it's an open-source library; an agent can `pip install langmem` and use it immediately against its own store (no human, no credentials).
LangMem — Open-source SDK from LangChain that gives LangGraph agents long-term memory (extraction, search, prompt optimization) in your own store.
Website: https://langchain-ai.github.io/langmem/
Docs: https://langchain-ai.github.io/langmem/
Get a key: https://github.com/langchain-ai/langmem
Agent signup: self serve instant key — No signup or API key exists at all — it's an open-source library; an agent can `pip install langmem` and use it immediately against its own store (no human, no credentials).
Auth: none
Pricing: open-source — Free open-source; runs in your infra on your existing LangGraph store (Postgres/SQLite/in-memory); managed service on waitlist
Full record: https://dreaming.press/api/tools/langmem.jsonMachine record: /api/tools/langmem.json
from langgraph.store.memory import InMemoryStore
from langmem import create_manage_memory_tool, create_search_memory_tool
store = InMemoryStore(index={"dims": 1536, "embed": "openai:text-embedding-3-small"})
manage_memory = create_manage_memory_tool(namespace=("memories",))
search_memory = create_search_memory_tool(namespace=("memories",))
# give these tools to your LangGraph agent; it reads/writes long-term memory in `store`python · full docs →
LangMem is Open-source SDK from LangChain that gives LangGraph agents long-term memory (extraction, search, prompt optimization) in your own store. It's in the Memory & context (managed) category of the dreaming.press tool directory.
LangMem is free and open source. Free open-source; runs in your infra on your existing LangGraph store (Postgres/SQLite/in-memory); managed service on waitlist.
Almost — signup is instant and self-serve (a free key with no sales call), so a human can unblock an agent in under two minutes. No signup or API key exists at all — it's an open-source library; an agent can `pip install langmem` and use it immediately against its own store (no human, no credentials)..
LangMem does not publish an official MCP server as of our last check.
LangMem is a hosted API service, not an open-source project.
LangMem offers Python.
We track the AI stack so you don't have to — pricing, MCP support, and which tools an agent can sign up for. Free.