Any MCP host
Connect to the local MCP server for explicit remember, recall, state, and audit operations. The protocol surface stays framework-neutral.
Ecosystem
Memory that fits the runtime you already use.
Perseus Vault is a local-first memory engine. Use its MCP server from any compatible host, or use maintained adapters when you want native framework interfaces.
Official LangChain integration
Tools, retrieval, and direct MCP access.
Perseus Vault is listed in the LangChain documentation registry. The Python package langchain-perseus-vault provides an agent toolkit, a BaseRetriever, and a low-level MCP client for a local perseus-vault binary.
Registry listing is an external documentation integration, not an endorsement claim. Source: langchain-ai/docs#4725 ↗, merged July 30, 2026 (00e822f7da2b0d0ba84d5aa81a2bb826d44a0245).
Choose an interface
One engine; distinct integration paths.
LangChain
Use create_perseus_vault_tools, PerseusVaultRetriever, or PerseusVaultClient. View adapter ↗
Maintained adapters
Repositories are available for Pydantic AI, Google ADK, Haystack, CrewAI, and LlamaIndex. Each remains an integration—not a separate memory product.
Product system
Separate responsibilities, interoperable by design.
Perseus resolves
Verified workspace context for the task at hand. Context engine →
Vault remembers
Durable, encrypted, time-valid memory. Perseus Vault →
Ledger proves
Hash-chained event provenance, evidence, and authority references. Perseus Ledger →