supermemory/apps/mcp

Supermemory MCP Server

The Supermemory MCP server gives authenticated AI clients access to a user's memories, profile, spaces, and interactive MCP Apps.

Runtime Model

• MCP SDK v2 with a fresh McpServer for every HTTP request
• Modern MCP 2026-07-28 plus stateless compatibility for 2025 clients
• OAuth token validation on every request
• No MCP protocol session or protocol Durable Object
• Active space stored as application state in a dedicated Durable Object
• Space state keyed by authenticated organizationId + userId

The space used by an operation resolves in this order:

1. An explicit containerTag tool or prompt argument
2. The account's durable active space
3. The Supermemory client default, sm_project_default

An explicit override applies only to that call. It does not mutate the active space.

Server URL

https://mcp.supermemory.ai/mcp

Example client configuration:

{
  "mcpServers": {
    "supermemory": {
      "url": "https://mcp.supermemory.ai/mcp"
    }
  }
}

The client discovers the OAuth authorization server through /.well-known/oauth-protected-resource/mcp.

Tools

Model-visible tools

Tool	Purpose
search_memory	Search memories and optionally include profile context
listDocuments	List document metadata and summaries in a space
getDocument	Read one document's available content by ID
listMemories	List extracted memory entries and their source document IDs
listSpaces	List spaces visible to the authenticated account
whoAmI	Return identity, access, and active-space context
add_memory	Save or forget a memory

MCP App launchers

Tool	Purpose
select-space	Open the interactive space picker
memory-graph	Open the interactive memory graph
guided-save	Open the guided memory form
upload-file	Open the file upload form

App-only tools

These tools are available to the embedded MCP App and hidden from the model.

Tool	Purpose
set-active-tag	Persist the selected active space
save-memory	Submit the guided save form
upload-file-submit	Submit an encoded file upload
fetch-graph-data	Fetch graph documents for the app

Resources And Prompt

Kind	Name or URI	Purpose
Resource	supermemory://profile	Profile facts in the effective space
Resource	supermemory://spaces	Visible spaces
Resource	ui://supermemory/app-v3.html	Embedded MCP App bundle
Prompt	context	Profile and recent context for an optional space

The App resource and tool metadata include both current nested ui metadata and the legacy flat resource URI key while MCP Apps completes its SDK v2 migration. The Worker runtime does not import the SDK v1 Apps server helpers.

Development

Install from the repository root:

bun install

Run the local Worker:

cd apps/mcp
bun run dev

The portless URL is http://mcp.dev.supermemory.

Useful commands:

bun run build
bun run check-types
bun run test:unit
bun run test:e2e

Authenticated end-to-end tests use credentials captured by:

bun e2e/capture-oauth-token.ts

Without stored OAuth credentials, authenticated test groups skip. Public OAuth discovery and rejection tests still run.

Configuration

Variable	Purpose	Default
API_URL	Supermemory API and OAuth issuer	https://api.supermemory.ai
MCP_RESOURCE	Expected OAuth audience	https://mcp.supermemory.ai/mcp
ALLOWED_MCP_ORIGIN_HOSTNAMES	Additional comma-separated browser origins	Built-in host allowlist
POSTHOG_API_KEY	Server-side MCP tool analytics project key	Disabled
POSTHOG_HOST	PostHog ingestion host	https://us.i.posthog.com

Storage And Rollout

SpaceState stores only the active space's container tag. It never stores bearer tokens, MCP client identity, or protocol messages.

The old SupermemoryMCP class and binding remain inert for one rollout. This keeps the migration non-destructive and rollback-safe. A later deployment can delete the old protocol class after production traffic and rollback windows have been checked.