Summary
A straightforward memory layer that lets Claude keep, recall, update, and forget information across conversations. It connects via streamable HTTP and gives you four core operations: store new facts, retrieve what's been saved, modify existing entries, and delete what's no longer relevant. Useful when you need session continuity without building your own persistence layer. Maindex provides the backend infrastructure with revision history, typed relationships, and a knowledge graph you can inspect through their dashboard. Works across multiple AI clients through MCP, so the same memory follows you whether you're in Claude, Cursor, or ChatGPT. The free tier gets you started, and collections can be locked behind passphrases if you're storing sensitive context.
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
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Public tool metadata for what this MCP can expose to an agent.
4 tools
keepStore a new memory in Maindex (Smart). Provide the content to persist, with optional headline, tags, collections, and metadata. Each call creates a distinct memory — not idempotent. CONTENT POLICY: NEVER store passwords, API keys, secrets, credit card numbers, SSNs, government...6 params
Store a new memory in Maindex (Smart). Provide the content to persist, with optional headline, tags, collections, and metadata. Each call creates a distinct memory — not idempotent. CONTENT POLICY: NEVER store passwords, API keys, secrets, credit card numbers, SSNs, government...
Parameters* required
collectionsarrayCollection slugs or IDs to add the new memory to.
contentstringPrimary text to store; required.
headlinestringOptional headline; Smart may generate one if omitted.
metadataobjectOpaque JSON metadata stored with the memory.
rewritebooleanFAILSAFE — defaults to false. When false (the default), content is stored exactly as provided with zero LLM processing. Set to true ONLY if the caller explicitly opts into LLM-assisted rewriting fo...default: false
tagsarrayOptional tags for categorization.
recallSearch and retrieve memories from Maindex (Smart). Modes: relevant (default), exact, current_state, history, recent. query is required unless mode is recent. Read-only for tenant memory data.4 params
Search and retrieve memories from Maindex (Smart). Modes: relevant (default), exact, current_state, history, recent. query is required unless mode is recent. Read-only for tenant memory data.
Parameters* required
filtersobjectOptional filters applied to recall results.
limitintegerMaximum results (default 20).default: 20
modestringRecall mode: relevant (semantic search), exact (literal match), current_state (latest revision only), history (revision trail), recent (newest first).one of
exact · relevant · current_state · history · recentdefault: relevantquerystringSearch text. Required unless mode is `recent`. Omit for a recency-sorted list (optionally filtered).
updateUpdate an existing memory in Maindex (Smart) by mem-* ID. Supply content, headline, tags, and/or metadata; at least one field is required. Each successful update creates a new revision (Expert semantics). CONTENT POLICY: NEVER store passwords, API keys, secrets, credit card nu...3 params
Update an existing memory in Maindex (Smart) by mem-* ID. Supply content, headline, tags, and/or metadata; at least one field is required. Each successful update creates a new revision (Expert semantics). CONTENT POLICY: NEVER store passwords, API keys, secrets, credit card nu...
Parameters* required
changesobjectFields to change; at least one of content, headline, tags, or metadata is required.
rewritebooleanFAILSAFE — defaults to false. When false (the default), content is stored exactly as provided with zero LLM processing. Set to true ONLY if the caller explicitly opts into LLM-assisted rewriting fo...default: false
target_idstringShort ID of the memory to update (mem-*).
forgetSoft-delete a memory by mem-* ID, or with wipe_history=true permanently purge all revisions (IRREVERSIBLE). When wipe_history is true, confirm_irreversible_wipe must also be true or a confirmation prompt is returned. Soft-delete (default) is safe and reversible.3 params
Soft-delete a memory by mem-* ID, or with wipe_history=true permanently purge all revisions (IRREVERSIBLE). When wipe_history is true, confirm_irreversible_wipe must also be true or a confirmation prompt is returned. Soft-delete (default) is safe and reversible.
Parameters* required
confirm_irreversible_wipebooleanRequired confirmation when wipe_history is true. Must be explicitly set to true to authorize irreversible permanent purge of all revisions. If wipe_history is true and this field is missing or fals...default: false
target_idstringShort ID of the memory to forget (mem-*).
wipe_historybooleanIf true, permanently purge all revisions and blank the body (IRREVERSIBLE). Otherwise soft-delete only. When true, confirm_irreversible_wipe must also be true or a confirmation prompt is returned i...default: false
Featured
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →
