Maindex Smart Memory Service

maindexapp/maindex

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.

tools: 4
auth: Secret needed
transport: HTTP
last updated: Nov 9, 2026

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Tools

4 tools

Public tool metadata for what this MCP can expose to an agent.

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

collectionsarray

Collection slugs or IDs to add the new memory to.

contentstring

Primary text to store; required.

headlinestring

Optional headline; Smart may generate one if omitted.

metadataobject

Opaque JSON metadata stored with the memory.

rewriteboolean

FAILSAFE — 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

tagsarray

Optional 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

filtersobject

Optional filters applied to recall results.

limitinteger

Maximum results (default 20).default: 20

modestring

Recall 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: relevant

querystring

Search 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

changesobject

Fields to change; at least one of content, headline, tags, or metadata is required.

rewriteboolean

target_idstring

Short 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_wipeboolean

Required 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_idstring

Short ID of the memory to forget (mem-*).

wipe_historyboolean

If 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

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Repository: github.com/maindexapp/maindex
Website: maindex.io
Category: AI & LLM Tools
Transport: HTTP
Auth: Required
Registry: MCP registry, active

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Maindex Smart Memory Service

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