Memory and Knowledge MCP Servers

8 memory and knowledge MCP servers are cataloged, 1 with verified current-spec support.

MCP servers that store and retrieve agent memory or knowledge: semantic memory layers, knowledge graphs, note stores, and documentation retrieval.

• Airweave Search - Earlier Revision

  Listed with a remote endpoint. Resolved from the published package: airweave-mcp-search 0.9.62 depends on @modelcontextprotocol/sdk@1.30.0, whose artifact implements 2025-11-25. This records what the artifact implements, not what a deployment negotiates.

• atlassian-dc-mcp-confluence - Earlier Revision

  Distributed as npm:@atlassian-dc-mcp/confluence. Resolved from the published package: @atlassian-dc-mcp/confluence 0.29.0 depends on @modelcontextprotocol/sdk@1.30.0, whose artifact implements 2025-11-25. This records what the artifact implements, not what a deployment negotiates.

• Codebase Memory MCP - Spec Support Unverified

  Community MCP server (by developer Martin Vogel) that indexes a codebase into a persistent knowledge graph for AI agents, distributed as a static binary via npm or PyPI and run locally over stdio. Hand check 2026-08-25: no MCP revision statement in README or docs; ships as a native binary whose npm package declares no runtime dependencies, so no SDK chain exists.

• Context7 - Current Spec Verified

  Upstash's Context7 documentation server: pulls current, version-specific library docs into prompts. Hosted at mcp.context7.com/mcp with bearer API keys (anonymous use is rate-limited); also runs locally via npm. The 4.0.0 release of 2026-08-07 migrated to the 2026-07-28 revision, and an endpoint probe the same day confirmed it. Endpoint probe confirmed support for 2026-07-28 via server/discover.

• IWE - Spec Support Unverified

  Turns a directory of markdown files into a knowledge graph that an editor's LSP and an AI agent's MCP client both read from, exposing fourteen tools for finding, creating, updating, querying and refactoring notes. It is distributed as the npm installer package @iwe-org/mcp, wrapping a Rust binary also published to crates.io as iwe, and runs over stdio by default with an optional self-hosted streamable-http mode. The HTTP mode binds to localhost by default and documents no built-in authentication, leaving TLS and access control to an external reverse proxy. No README, docs page, changelog or server.json names a supported MCP specification revision, so spec_status is unknown; the rmcp v3 dependency in the server's Cargo.toml is an SDK range, not a revision statement.

• mcp-local-rag - Earlier Revision

  Distributed as npm:mcp-local-rag. Resolved from the published package: mcp-local-rag 0.17.4 depends on @modelcontextprotocol/sdk@1.30.0, whose artifact implements 2025-11-25. This records what the artifact implements, not what a deployment negotiates.

• NEXO Brain - Spec Support Unverified

  Distributed as npm:nexo-brain. First-party: the package is the local runtime core of the publisher's own NEXO Desktop product, per the repository's own statement. The registry record (v1.5.2, updated 2026-03-29) trails npm (7.38.7, 2026-06-28) by six major versions. No MCP revision statement found (checked 2026-08-27).

• screenpipe - Earlier Revision

  Distributed as npm:screenpipe-mcp. Resolved from the published package: screenpipe-mcp 0.19.1 depends on @modelcontextprotocol/sdk@1.30.0, whose artifact implements 2025-11-25. This records what the artifact implements, not what a deployment negotiates.