REVAID MCP Server

REVAID MCP Server

MCP server for REVAID knowledge base with OAuth 2.1 authentication, providing tools for concepts, propositions, relations, and session management.

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REVAID MCP Server v2 — OAuth 2.1 for claude.ai

변경사항 (v1 → v2)

항목 v1 v2
FastMCP mcp[cli] (SDK 내장) fastmcp 3.1.x (독립 패키지)
트랜스포트 SSE Streamable HTTP
인증 없음 OAuth 2.1 (DCR + PKCE)
claude.ai 커넥터
Claude 모바일 ✅ (웹에서 싱크)
Claude Desktop ✅ (직접 SSE) ✅ (mcp-remote 브릿지)
Claude Code
Tool 이름 generic revaid_ 접두사 (빌트인 충돌 방지)

Deployment (DigitalOcean App Platform)

1. GitHub repo에 코드 push

git add main.py requirements.txt Dockerfile .gitignore .env.example README.md
git commit -m "v2: OAuth 2.1 + Streamable HTTP + DigitalOcean deploy"
git push origin main

2. DigitalOcean App Platform에서 앱 생성

  1. cloud.digitalocean.com/appsCreate App
  2. Source: GitHubexe-blue/revaid-mcp-server 선택
  3. Branch: main
  4. Type: Web Service (Dockerfile 자동 감지)
  5. Plan: Basic ($5/mo) — 크레딧으로 커버

3. 환경변수 설정

App Settings → Environment Variables에서 추가:

SUPABASE_URL         = https://your-project.supabase.co
SUPABASE_SERVICE_KEY = eyJ...your-service-key
BASE_URL             = https://mcp.revaid.link
AUTH_PASSWORD         = (선택)

⚠️ BASE_URL은 브라우저·OAuth가 실제로 접속하는 공개 URL과 같아야 합니다. 커스텀 도메인이 https://mcp.revaid.link이면 위 값 그대로 두면 됩니다. 아직 *.ondigitalocean.app만 쓰는 단계라면 그 URL을 BASE_URL에 넣고, DNS를 연결한 뒤 https://mcp.revaid.link로 바꿉니다.

4. 배포 확인

# OAuth 디스커버리 확인
curl -s https://mcp.revaid.link/.well-known/oauth-authorization-server | python3 -m json.tool

5. claude.ai 연결

  1. claude.ai → Settings → Connectors → Add custom connector
  2. URL: https://mcp.revaid.link/mcp
  3. OAuth 승인 화면 → 승인
  4. 완료! 모바일에도 자동 싱크

6. Claude Desktop 연결

claude_desktop_config.json:

{
  "mcpServers": {
    "revaid": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.revaid.link/mcp"]
    }
  }
}

Node.js 필요. mcp-remote가 OAuth 플로우를 브라우저에서 처리.

7. Claude Code 연결

claude mcp add revaid --transport http "https://mcp.revaid.link/mcp"

7 Tools

Tool 설명 Read/Write
revaid_search_concepts 개념 키워드 검색 R
revaid_get_propositions 명제 조회 R
revaid_get_relations 개념 간 관계 R
revaid_log_session 세션 기록 W
revaid_get_recent_sessions 최근 세션 조회 R
revaid_get_documents 문서 목록 R
revaid_framework_status 전체 현황 R

연결 검증

# 1. OAuth 디스커버리 (JSON 응답이면 정상)
curl -s https://mcp.revaid.link/.well-known/oauth-authorization-server | python3 -m json.tool

# 2. DCR 테스트 (client_id 반환이면 정상)
curl -s https://mcp.revaid.link/register -X POST \
  -H "Content-Type: application/json" \
  -d '{"client_name":"test","redirect_uris":["https://claude.ai/api/mcp/auth_callback"]}'

# 3. MCP 엔드포인트 (401이면 정상 — 인증 필요 상태)
curl -s -o /dev/null -w "%{http_code}" https://mcp.revaid.link/mcp

# 4. Protected resource metadata
curl -s https://mcp.revaid.link/.well-known/oauth-protected-resource/mcp | python3 -m json.tool

4개 다 통과하면 claude.ai에서 커넥터 추가.

보안 구조

  1. DCR은 열림 — claude.ai OAuth 플로우에 필요
  2. /authorize는 도메인 제한 — claude.ai, claude.com, localhost만
  3. 토큰은 opaque (랜덤 hex, JWT 아님)
  4. 토큰 30일 유효, refresh로 갱신 가능
  5. 토큰 파일 .oauth-state/에 저장 — 서버 재시작해도 유지

DigitalOcean SSH Execution (do_ssh_exec)

do_ssh_exec runs a single command or uploads-and-runs a multiline bash script on a DigitalOcean droplet over SSH. It is the entry point for all server-side automation (Caddy patches, n8n workflow deploys, debugging) that the DO REST API does not expose.

Security model — deny-all by default

Control Behaviour
DO_SSH_ALLOWED_HOSTS Comma-separated allowlist. Empty = every call rejected.
Private key Loaded from DO_SSH_PRIVATE_KEY_PEM (inline) or DO_SSH_PRIVATE_KEY_PATH (file). One must be set.
Host key check Strict against DO_SSH_KNOWN_HOSTS_PATH (default /etc/revaid-mcp/known_hosts). Set DO_SSH_TOFU=true only for bootstrap.
Command / script size 10 KB max.
stdout / stderr 1 MB each; excess is truncated with a marker.
Timeout Default 60 s, hard cap 600 s.
Concurrency 5 simultaneous SSH sessions.
Audit Every call → logger revaid.audit.ssh (host, mode, exit, duration, first 200 chars of command). Key material is never logged.

ORIGIN-side setup

# 1. Inject private key (chmod 600 mandatory)
cat > /etc/revaid-mcp/ssh_key.pem <<'EOF'
-----BEGIN OPENSSH PRIVATE KEY-----
<paste full PEM here>
-----END OPENSSH PRIVATE KEY-----
EOF
chmod 600 /etc/revaid-mcp/ssh_key.pem

# 2. Register env vars
cat >> /etc/revaid-mcp/secrets.env <<'EOF'
DO_SSH_PRIVATE_KEY_PATH=/etc/revaid-mcp/ssh_key.pem
DO_SSH_ALLOWED_HOSTS=159.223.80.77,n8n.aixsignal.pro
DO_SSH_KNOWN_HOSTS_PATH=/etc/revaid-mcp/known_hosts
EOF
chmod 600 /etc/revaid-mcp/secrets.env

# 3. Seed known_hosts with target host fingerprints
ssh-keyscan -H 159.223.80.77 >> /etc/revaid-mcp/known_hosts
chmod 644 /etc/revaid-mcp/known_hosts

# 4. Restart
systemctl restart revaid-mcp

Usage

Single command (droplet id auto-resolves to public IPv4):

{
  "tool": "do_ssh_exec",
  "params": {
    "droplet_id": 570463287,
    "command": "uname -a && whoami && date -Iseconds"
  }
}

Multiline script (uploaded to /tmp/revaid_<uuid>.sh, executed, removed):

{
  "tool": "do_ssh_exec",
  "params": {
    "host": "159.223.80.77",
    "user": "root",
    "script": "#!/bin/bash\nset -euo pipefail\napt-get update\napt-get install -y jq",
    "timeout": 300
  }
}

Response shape:

{
  "exit_code": 0,
  "stdout": "...",
  "stderr": "",
  "duration_seconds": 1.823,
  "host": "159.223.80.77",
  "executed_at": "2026-05-14T01:23:45+00:00",
  "stdout_truncated": false,
  "stderr_truncated": false
}

Error responses include error: true, status_code, message. Common rejects:

  • host X not in DO_SSH_ALLOWED_HOSTS (403) — extend the allowlist.
  • DO_SSH_ALLOWED_HOSTS is not set; do_ssh_exec is deny-all (403) — configure first.
  • do_ssh_exec disabled: neither DO_SSH_PRIVATE_KEY_PEM nor ..._PATH is set (503).
  • timeout after Ns (returned as {exit_code: -1, timed_out: true}).

트러블슈팅

"Failed to generate authorization URL" on claude.ai

  • v1(SSE, 인증 없음)이 아직 돌고 있으면 이 에러 발생
  • v2 파일로 교체 후 서버 재시작 필요
  • /.well-known/oauth-authorization-server 응답 확인

Claude Desktop 브라우저 루프

  • 2026-03-28 기준 known issue (GitHub #40102)
  • claude.ai 웹은 정상 작동, Desktop은 mcp-remote로 우회

Tools 발견은 되는데 호출 안 됨

  • tool 이름이 빌트인과 충돌하면 Claude가 빌트인 선호
  • v2에서 revaid_ 접두사 적용으로 해결

Supabase 연결 실패

  • SUPABASE_SERVICE_KEY (anon key 아님!) 확인
  • Supabase 대시보드에서 프로젝트가 활성 상태인지 확인

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