evermemos-mcp 0.5.5

MCP Server that brings long-term memory to AI coding tools via EverMemOS

evermemos-mcp

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Long-term memory for AI coding assistants. Remember once, recall forever.

You spent thirty minutes explaining your architecture, naming conventions, and why you dropped MongoDB. Next session — gone. You explain it all over again.

evermemos-mcp fixes this. One remember call stores it. One briefing call brings it back — across any session, any client.

Benchmark: 60/60 recall vs 0/60 baseline. Zero attribution errors. P95 < 2s. (evidence)

---

Quick Start

Get your API key from EverMemOS Cloud, then add to your MCP client config:

{
  "mcpServers": {
    "evermemos-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": ["evermemos-mcp@latest"],
      "env": {
        "EVERMEMOS_API_KEY": "your-key-here"
      }
    }
  }
}

Or run directly:

uvx evermemos-mcp@latest

Works with Claude Code, Cursor, Cline, Cherry Studio, and any MCP-compatible client. See docs/05-client-integrations.md for client-specific setup.

Install from source

git clone https://github.com/tt-a1i/evermemos-mcp.git
cd evermemos-mcp
cp .env.example .env   # set EVERMEMOS_API_KEY
uv run evermemos-mcp

MCP client config for source installs:

{
  "mcpServers": {
    "evermemos-mcp": {
      "type": "stdio",
      "command": "uv",
      "args": ["run", "--directory", "/path/to/evermemos-mcp", "evermemos-mcp"],
      "env": { "EVERMEMOS_API_KEY": "your-key-here" }
    }
  }
}

---

What You Get

7 Tools

Tool	What it does
list_spaces	Discover available memory spaces
remember	Store context into long-term memory. Auto-detects sensitive content (API keys, passwords) and checks for conflicting memories
request_status	Check if a queued write has been extracted
recall	Search memories with 6 retrieval strategies (keyword / hybrid / vector / RRF / agentic / auto)
briefing	One-call session-start context restore: profile + episodes + facts + foresights
forget	Targeted deletion with verification workflow
fetch_history	Paginate through memory timeline by type

Key Capabilities

• Space isolation — coding:my-app, chat:preferences, study:ml-notes — memories never bleed across projects
• Multi-space search — Query up to 10 spaces in one recall call with automatic source attribution
• Sensitive content guard — Blocks API keys, passwords, tokens, private keys before storing. Asks user to confirm
• Memory conflict detection — Auto-checks for similar memories in chat:* spaces. Surfaces conflicts so the agent can decide
• Lifecycle tracking — Every result labeled queued, provisional, fallback, or searchable across all tools
• Traceable citations — memory_type, snippet, timestamp, score, source_message_id on every result
• Git auto-detection — Omit space_id and it infers coding:<repo-name> from git remote
• Robust error handling — Retry with backoff (429/5xx), GET body fallback for proxy/WAF, structured error codes

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Use Cases

Persistent architecture context:

You: remember we chose PostgreSQL because our data is highly relational
     [space_id: coding:my-saas]

-- next day, new session --

You: what database did we choose and why?
     → "Chose PostgreSQL — highly relational data model"

Personal preferences that stick:

You: remember I prefer dark mode, vim keybindings, and concise responses
     [space_id: chat:preferences]

-- any future session --

You: recall my UI preferences
     → "dark mode, vim keybindings, concise responses"

Cross-session learning notes:

You: remember bias-variance tradeoff — high bias = underfitting, high variance = overfitting
     [space_id: study:ml-notes]

-- later --

You: briefing for study:ml-notes
     → profile + recent episodes + key facts + foresights

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Why evermemos-mcp

There are other memory MCP servers. Here's what makes this one different:

	evermemos-mcp	Mem0 MCP	Letta/MemGPT	Official MCP memory
Space isolation	domain:slug per project/topic	No	No	No
Lifecycle tracking	queued → provisional → fallback → searchable	No	No	No
Sensitive content guard	API keys, passwords, tokens blocked	No	No	No
Conflict detection	Auto for chat spaces	No	No	No
Multi-space search	Up to 10 spaces in one call	No	No	No
Retrieval strategies	6 methods + auto merge	Semantic only	Semantic only	None
Benchmark verified	60/60 recall, 0 errors	—	—	—
Setup	uvx evermemos-mcp	Cloud or self-host	Self-host required	npx

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Benchmark

Tested on a fixed 60-query set across coding, chat, and study spaces.

Metric	With memory	Without memory
Hit rate	60/60 (100%)	0/60 (0%)
Attribution errors	0	—
P95 latency	1958 ms	—

Evidence:

• benchmark_summary.json
• benchmark_report.md
• runs.jsonl (release)

---

How It Works

MCP Client (Claude Code / Cursor / Cline / Cherry Studio)
        │
        │  MCP stdio
        ▼
┌─────────────────────────────┐
│     evermemos-mcp server    │
│  ┌───────────────────────┐  │
│  │   7 Tool Handlers     │  │
│  └──────────┬────────────┘  │
│  ┌──────────▼────────────┐  │
│  │   Memory Service      │  │  Content guard → Conflict check → Cloud write → Lifecycle tracking
│  └──────────┬────────────┘  │
│  ┌──────────▼────────────┐  │
│  │ Space Catalog Service │  │  Space registry, metadata sync, cross-session recovery
│  └──────────┬────────────┘  │
│  ┌──────────▼────────────┐  │
│  │  EverMemOS HTTP Client│  │  Auth, retries, rate-limit backoff, error normalization
│  └──────────┬────────────┘  │
└─────────────┼───────────────┘
              │  HTTPS
              ▼
       EverMemOS Cloud API

• Cloud-first — All memories live in EverMemOS Cloud. No local state to lose.
• Async extraction — remember queues content for AI extraction. Use request_status to track progress.
• Not a thin wrapper — 2500+ lines of orchestration: fallback hierarchies, multi-method search merging, identity mirroring, partial failure recovery.

---

Space Templates

Template	Use it for
chat:preferences	Durable personal preferences, names, tone, UI likes
chat:daily	Ongoing chat context that shouldn't leak into projects
coding:<repo>	Architecture decisions, conventions, bugs, project context
study:<topic>	Learning notes, topic progress, revision context

Which Tool When

Goal	Tool	Why
Start a new session	briefing	Fastest way to restore context in one call
Find a specific fact	recall	Relevance-ranked search across spaces
Review what happened	fetch_history	Chronological timeline > ranked search for audits
Verify before/after delete	fetch_history	Stable timeline for pre/post-delete checks

---

Configuration

Variable	Default	Description
EVERMEMOS_API_KEY	(required)	EverMemOS Cloud API key
EVERMEMOS_USER_ID	mcp-user	Default user identity
EVERMEMOS_DEFAULT_SPACE	(auto)	Default space. Auto-detected from git remote as coding:<repo>
EVERMEMOS_BASE_URL	https://api.evermind.ai	API endpoint
EVERMEMOS_DEFAULT_TIMEZONE	UTC	Timezone for metadata
EVERMEMOS_ENABLE_CONVERSATION_META	true	Sync conversation metadata

Advanced configuration

Variable	Default	Description
EVERMEMOS_API_VERSION	v0	API version
EVERMEMOS_LLM_CUSTOM_SETTING_JSON	—	Custom LLM extraction settings
EVERMEMOS_USER_DETAILS_JSON	—	User profile details for conversations

flush Rules

Scenario	flush
Mid-conversation, more messages coming	false
End of session / topic switch / summary	true
Uncertain	true (safer)

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Advanced: Memory Lifecycle States

State	Meaning
queued	Write accepted, extraction not yet confirmed
provisional	Answer from pending_messages while extraction is in progress
fallback	Answer from mirrored conversation-meta, not formal extracted memory
searchable	Answer from formal extracted memories

All 7 tools expose compatible lifecycle blocks so agents always know memory maturity.

Advanced: Forget Safety

Cloud deletion is async and best-effort. evermemos-mcp provides a verification-first workflow:

1. Confirm target memory_id via fetch_history or recall
2. Call forget(memory_ids=[...], space_id=...)
3. Verify with fetch_history
4. If target persists, the lifecycle model surfaces this transparently

This is deliberate: expose real state to the agent rather than pretend deletion is instant.

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Development

uv sync --group dev       # Install dev dependencies
uv run ruff check         # Lint
uv run pytest             # Tests (285 pass)

Documentation

Document	Description
docs/02-architecture.md	Technical architecture
docs/05-client-integrations.md	Client setup guides
docs/auto-memory-prompt.md	Auto-memory prompt templates
docs/06-benchmark.md	Benchmark protocol
CHANGELOG.md	Version history

License

MIT