How do I connect Perseus Vault MCP Server to Claude?

The project does not publish a launch command that MCPVault could verify. Open the repository linked on this page for its install steps; the listing names Claude Desktop, Claude Code, Cursor as compatible clients.

Is Perseus Vault MCP Server free?

The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.

What can Perseus Vault MCP Server do?

Perseus Vault MCP Server documents 40 tools to the agent, including perseus_vault_as_of, perseus_vault_ask, perseus_vault_bitemporal. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.

Perseus Vault

Unclaimed

by Perseus-Computing-LLC

Perseus Vault — durable, encrypted, time-aware memory for AI agents. One Rust binary, one file, local-first, MCP-native, MIT.

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This server needs project-specific setup. Follow the project instructions; no reusable public launch command is available yet.

Project instructions

agent-memoryai-agentscontext-engineeringencryptionfts5llmlocal-firstmcpmcp-servermodel-context-protocolopen-sourcepersistent-memoryrustsemantic-searchsqlitevector-search

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40 of 40 tools

Documented tools (40)

From project documentation. A server handshake does not verify each tool’s description or behavior.

perseus_vault_as_of

Transaction-time time-travel: the version of a fact (category + key) that was believed at a past instant.

perseus_vault_ask

RAG: recall context, query LLM, return grounded answer with sources.

perseus_vault_bitemporal

Full 2-axis bi-temporal query: "as of transaction time T, what did we believe was true at valid time V" — the exact rectangle cell.

perseus_vault_capture

Opt-in in-session capture (#520): distill a transcript/insight payload (text, markdown, or JSONL) into durable entities (root-cause / pitfall / decision / pattern / takeaway) the moment a problem is solved. Local rule-based distiller by default, optional llm: true with graceful fallback; near-dup me

perseus_vault_check_failure_pattern

Deja-vu guard: check an action against previously recorded failures (journal + failure/pitfall entities) before retrying it. Read-only.

perseus_vault_communities

GraphRAG community detection over the link graph (deterministic label propagation or greedy-modularity "louvain"; pure Rust, offline).

perseus_vault_community_summary

Extractive (optionally LLM-polished) summary of one community, materialized as an entity with evidencefor links to members.

perseus_vault_context

Pre-formatted markdown block for session injection. Recall-first by default: pass query (the current task/message) and only topically relevant entities are injected, clamped to a per-model budget; the legacy unconditional dump requires mode: "alwaysinject".

perseus_vault_decay

Recalculate Ebbinghaus decay scores (batched 1000-entity transactions).

perseus_vault_embed

Generate dense vectors via the bundled model, Ollama, or OpenAI-compatible endpoint.

perseus_vault_expire

Time-based lifecycle sweep: entities past their body expiresat transition to status='expired' (content retained, dry-run supported).

perseus_vault_extract

Local, deterministic, rule-based knowledge extraction (facts / preferences / temporal events / episodes) from text or a stored entity. Read-only.

perseus_vault_forget

Soft-delete (archived=1).

perseus_vault_get_entity

Fetch one entity by ID with full bodyjson.

perseus_vault_global_recall

GraphRAG global search: breadth over community summaries, then depth into the best communities' members — holistic answers across clusters.

perseus_vault_graph_attest

Stamp the from-side entity id as the evidence anchor on legacy edges so they become serveable by the graph recall arms (#869); dry-run preview, journaled.

perseus_vault_graph_drift

Read-only graph/entities/indexes/receipts drift report (#869): unattested, dangling, archived/expired-target, and cross-workspace edges, stale community memberships, FTS drift, journal refs to missing entities.

perseus_vault_history

List superseded versions of a fact (category + key), newest first — paginated (limit default 20, plus offset); total reports the full trail size (companion to perseusvaultasof).

perseus_vault_hygiene

Read-only startup-memory hygiene report (#675): scores active memories by "actionability" (concrete anchors — issue keys, #refs, paths, URLs, decisions — vs vague/date-only/short) and lists the worst offenders with reasons, for archive/consolidate curation.

perseus_vault_ingest

Trigger connector syncs (GitHub, file watcher).

perseus_vault_ingest_file

Locally extract a document's text (plaintext/markdown always; DOCX/PDF with the multimodal feature) and store it as a recallable entity.

perseus_vault_journal

Append structured event with actor attribution.

perseus_vault_link

Create typed relationship links between entities.

perseus_vault_memories

Anthropic memory-tool compatible file interface (view/create/strreplace/insert/delete/rename under /memories), backed by vault entities.

perseus_vault_prune

Bulk archive by category, decay threshold, or age.

perseus_vault_purge

Permanently delete archived entities + VACUUM. Destructive.

perseus_vault_recall

Search with FTS5/dense/hybrid modes, filters, stemming expansion. Query contract (#562): query="" is match-all enumeration (the "list all" path); "" and other wildcards are literal FTS5 terms, not globs — "" matches nothing.

perseus_vault_recall_layer

Recall from a specific biomimetic layer (world, episodic, semantic).

perseus_vault_recall_when

Proactive just-in-time recall: surface entities whose recallwhen triggers match.

perseus_vault_remember

Store/update entity. Idempotent by (category, key); a content change snapshots the prior version into history.

perseus_vault_scan

Deterministic paginated enumeration of a category or the whole store (#562): immutable id ASC keyset pages with a nextcursor/hasmore contract, so export/sync/reset callers can walk every entity exactly once. Read-only — no retrieval-count/decay side-effects, no offset cap.

perseus_vault_semantic_search

Dense-only semantic search shortcut — find entities by meaning, ranked purely by embedding similarity (no keyword fallback).

perseus_vault_state_delete

Delete state entry.

perseus_vault_state_get

Get state value. Returns null if expired.

perseus_vault_state_list

List state keys, optionally filtered by prefix.

perseus_vault_state_set

Set key-value state with optional TTL.

perseus_vault_timeline

Query journal by time range with filters.

perseus_vault_traverse

Walk entity link graph up to configurable depth.

perseus_vault_unlink

Remove entity links.

perseus_vault_valid_at

Valid-time lookup: the version that was actually true in the world at an instant, per current knowledge (SQL:2011 APPLICATIONTIME).

Tool change history

Compared across complete checks of the same configuration. Tools were listed, not invoked. Input-schema changes are not measured here.

No complete tool checks yet.

FAQ

Questions about Perseus Vault MCP Server

How do I connect Perseus Vault MCP Server to Claude?: The project does not publish a launch command that MCPVault could verify. Open the repository linked on this page for its install steps; the listing names Claude Desktop, Claude Code, Cursor as compatible clients.
Is Perseus Vault MCP Server free?: The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
What can Perseus Vault MCP Server do?: Perseus Vault MCP Server documents 40 tools to the agent, including perseus_vault_as_of, perseus_vault_ask, perseus_vault_bitemporal. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.