Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
作者による説明(英語の原文)
Exactly-once execution guard for AI agents. Prevents duplicate payments and webhooks on retry.
この3つを1つのスコアにまとめることはしません。意見、測定、人気はそれぞれ別のものだからです。
このサーバーのやさしい解説はまだ書いていません。以下はレジストリから読み取った事実です。
使っているAIアプリを選んで、設定をコピーしてください。
必要なもの
どのアプリを使っていますか?
上でアプリを選んでください。選んだアプリを覚えておくので、次からはボタンに「…にインストール」と表示されます。
Claude Desktop → Settings → Developer → Edit Config を開き、claude_desktop_config.json にこれを貼り付けます
{
"mcpServers": {
"safeagent": {
"command": "uvx",
"args": [
"safeagent-exec-guard"
]
}
}
}ターミナルでこれを実行します
claude mcp add safeagent -- uvx safeagent-exec-guardプロジェクトの .cursor/mcp.json、または ~/.cursor/mcp.json に貼り付けます
{
"mcpServers": {
"safeagent": {
"command": "uvx",
"args": [
"safeagent-exec-guard"
]
}
}
}ブラウザがアプリを開いてよいか確認し、そのあとアプリが設定を表示して確認を求めます。キーの値は空欄のままなので、自分で入力してください。
プロジェクトの .vscode/mcp.json に貼り付けます
{
"servers": {
"safeagent": {
"type": "stdio",
"command": "uvx",
"args": [
"safeagent-exec-guard"
]
}
}
}ブラウザがアプリを開いてよいか確認し、そのあとアプリが設定を表示して確認を求めます。キーの値は空欄のままなので、自分で入力してください。
これはパソコンで動くサーバーですが、ChatGPTがつなげるのはインターネット上のサーバーだけです。ほかのアプリを選んでください。
選んだアプリは、この端末のCookieに保存されます。アカウントは不要です。
この設定は、作者のレジストリ登録情報から作成しています。READMEと違う場合は、READMEに従ってください。
パソコンで動くサーバーです。インストールすると、ツール一覧がAIアプリに表示されます。
誰でも見られる情報をチェックしており、コードは読んでいません。当てはまらない項目は数に入れていません。 · 2026年11月6日にチェック
レジストリ名は、リポジトリを所有するGitHubアカウント azender1 で確認済みです
このリポジトリはまだGitHubから読み取っていません
このリポジトリはまだGitHubから読み取っていません
これはパソコンで動くため、インターネット上のエンドポイントはありません
パソコンで動き、代わりにローカルの設定を使います
パソコンで動くサーバーです。ツール一覧を読み取れるのは、インターネット上のエンドポイントがある場合だけです
レジストリでこのカテゴリにある有効なすべてのサーバーと比較しています。スターは、公開者がリポジトリの所有者である場合だけ数えます。
当てはまる基本チェック1項目のうち1項目に合格しました。コードは読んでいません。キーやトークンを追加する前に、サーバーがどんなアクセスを求めているかを確認し、必要な権限だけを持つキーを使ってください。
レジストリには必須のキーは載っていません。ただし、最初に使うときにサインインを求めるサーバーもあります。
あなたのパソコンで動きます。必要なときにAIアプリが起動し、データは作者のサーバーを通りません(サーバー自体がオンラインサービスを呼び出す場合を除きます)。
GitHubリポジトリの最終更新は–、最新バージョン(0.1.22)がレジストリに届いたのは5 か月前です。
Claude Desktop、Claude Code、Cursor、VS CodeなどのMCP対応アプリで使えます。パソコンにPython (uv)も必要です。
同じカテゴリには:Spec Driven Development, Remote Desktop Commander, Apify MCP Server
同じカテゴリで、ほかの作者が作ったサーバー。スターの多い順。
カードの見方:★ GitHubスターi3つの柱:レビュー · チェック · 利用状況i更新=最新バージョンをレジストリに公開した日i
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Extract data from any website with thousands of scrapers, crawlers, and automations on Apify Store ⚡
作者のリポジトリから書かれたとおりにコピーしたものです。PopNx MCPは内容を確認・推奨していません。HTML、画像、スクリプトは取り除いています。リンクはこのサイトの外へ移動します。
POST /claim · safeagent-production.up.railway.app Dashboard: safeagent-dashboard-2.vercel.app
# Claim an action — free, no payment header required
curl -s -X POST https://safeagent-production.up.railway.app/claim \ -H "Content-Type: application/json" \ -d '{"request_id":"order:TQQQ:buy:6:2026-05-19T13:31:00-04:00","action":"order"}'
curl -s -X POST https://safeagent-production.up.railway.app/settle/order:TQQQ:buy:6:2026-05-19T13:31:00-04:00 \ -H "Content-Type: application/json" \ -d '{"result":{"status":"completed"}}'
curl -s -X POST https://safeagent-production.up.railway.app/claim \ -H "Content-Type: application/json" \ -d '{"request_id":"order:TQQQ:buy:6:2026-05-19T13:31:00-04:00","action":"order"}'
curl -s -X POST https://safeagent-production.up.railway.app/claim/test \ -H "Content-Type: application/json" \ -d '{"agent_id":"bot-1","action_type":"order","scope":"TQQQ:buy:bar:2026-05-19T13:31:00-04:00"}'
Indexed on Bazaar.
A credential-free experiment exercises CrewAI 1.15.21's actual same-process \ToolUsage._use\ retry against SafeAgent 0.1.23. Across 30 post-effect/pre-confirmation trials, the unguarded path recorded two effects per logical action; the SafeAgent path recorded one effect and retained a \PENDING\ claim for reconciliation.
Scope: scripted deterministic LLM and harmless effect recorded through an out-of-process capability-separated ledger. This does not validate process death, fresh-worker recovery, a real external provider, or SafeAgent Control reconciliation.
Method, source, tests, hashes, and 180-trial evidence
Two bounded, read-only reconciliation pilots are open for outside operators. There is no fee unless SafeAgent Control identifies a previously unknown, reproducible discrepancy that the operator agrees is actionable.
This implementation is a Mycelium Provider. Each completed action submits a trail to ARGENTUM with a content-addressed action_ref (JCS+SHA-256 over the four preimage fields). The returned mycelium_trail_id is included in every receipt for independent verification.
SafeAgent is the first verified external integrator on Soma — the Mycelium agent catalog. Every production execution is anchored on-chain via Mycelium Trails and independently verifiable without going through the operator.
SafeAgent is a durable execution-claim guard. It suppresses concurrent and repeated attempts that use the same stable request_id, and preserves unresolved attempts for reconciliation instead of silently retrying them.
Every action gets a stable request_id derived from the logical action. A new key returns PROCEED; a settled key returns SKIP with its stored result. A key left PENDING after a timeout or crash remains blocked because local state alone cannot prove whether the provider accepted the action. Recover it only after checking provider evidence or using provider-native idempotency.
State machine: CLAIMABLE → PENDING → COMMITTED; later claims observe PENDING or SKIP.
Common failure modes SafeAgent prevents:
| Scenario | Without SafeAgent | With SafeAgent |
|---|---|---|
| Stripe charge times out after acceptance | Retry may charge twice | Same key remains PENDING until provider reconciliation |
| Welcome email on signup retried | User gets two welcome emails | Second send returns SKIP |
| Webhook delivered twice (Stripe/GitHub/Twilio guarantee at-least-once) | Event processed twice | Second processing returns SKIP |
| Workspace provisioned on retry | Two workspaces created | Second provision returns SKIP |
| AI agent tool call retried after crash | Duplicate side effect | Same key stays blocked; outcome is explicitly unresolved |
Guarantee boundary: SafeAgent proves local claim state, not the external outcome.
COMMITTEDmeans the caller settled a receipt.PENDINGmeans unresolved—not failed and not confirmed successful. End-to-end exactly-once effects require provider-native idempotency and/or reconciliation with the provider's authoritative records.
SafeAgent is the durable claim and duplicate-suppression layer in an agent execution integrity stack:
Polaris (commit-gated authorization)
└── AgentGraph safety verdict (pre-execution safety gate) └── SafeAgent (durable claim guard) ← you are here └── Mycelium Trails (on-chain anchor)
Each layer is independently authored and independently verifiable. None trusts the others.
Gate an action. Returns PROCEED on first call, SKIP on any repeat.
Request body:
{
"request_id": "order:TQQQ:buy:6:2026-05-19T13:31:00-04:00", "action": "order" }
request_id — stable identifier derived from what the agent is doing. Same inputs = same key.action — the action type being gated (e.g. payment.send, email, trade, order)Response:
{ "status": "PROCEED", "request_id": "order:TQQQ:buy:6:2026-05-19T13:31:00-04:00" }
Retry with the same payload:
{ "status": "SKIP", "request_id": "order:TQQQ:buy:6:2026-05-19T13:31:00-04:00", "existing": {...} }
Settle a claim after the action fires. Advances status from PENDING to COMMITTED.
curl -s -X POST https://safeagent-production.up.railway.app/settle/order:TQQQ:buy:6:2026-05-19T13:31:00-04:00 \
-H "Content-Type: application/json" \ -d '{"result":{"status":"completed","txid":"abc123"}}'
{ "status": "committed", "request_id": "..." }
Free test endpoint — same logic, no payment required. Limited to 10 calls per IP total.
curl -s -X POST https://safeagent-production.up.railway.app/claim/test \
-H "Content-Type: application/json" \ -d '{"agent_id":"bot-1","action_type":"order","scope":"TQQQ:buy:6:bar:2026-05-19T13:31:00-04:00"}'
{ "status": "PROCEED", "request_id": "...", "test": true, "calls_remaining": 9 }
Full claim history. Filter by agent_id, action, status, or timestamp range.
curl "https://safeagent-production.up.railway.app/audit?agent_id=bot-1&status=COMMITTED"
{"items": [...], "total": 5, "limit": 100, "offset": 0}
Parameters: agent_id, action, status, from_ts, to_ts, limit (max 1000), offset.
import requests
def claim(request_id: str, action: str) -> dict: r = requests.post( "https://safeagent-production.up.railway.app/claim", headers={"Content-Type": "application/json"}, json={"request_id": request_id, "action": action} ) return r.json() # {"status": "PROCEED"|"SKIP", "request_id": "..."}
def settle(request_id: str, result: dict) -> dict: r = requests.post( f"https://safeagent-production.up.railway.app/settle/{request_id}", headers={"Content-Type": "application/json"}, json={"result": result} ) return r.json()
response = claim("payment:customer-123:invoice-456", "payment.send") if response["status"] == "PROCEED": result = send_payment(...) settle("payment:customer-123:invoice-456", {"status": "completed"}) elif response["status"] == "SKIP": print("Already executed, skipping")
For production Stripe PaymentIntents, use the permit-gated adapter documented in SafeAgent Boundary. It keeps the Stripe credential outside the agent, passes the consumed permit ID to Stripe as the native idempotency key, persists the provider correlation, verifies webhook signatures and supports authoritative read-back. The simple claim/settle snippet below illustrates the generic API only; it is not the provider adapter.
Run the bounded test-mode example in examples/stripe_payment_intent_guard.py. The verification record documents the observed end-to-end result: one successful Stripe sandbox PaymentIntent, an exact replay blocked before provider dispatch, and authoritative reconciliation by retrieve.
import requests
def safe_stripe_charge(customer_id, amount, idempotency_key): request_id = f"stripe:charge:{customer_id}:{idempotency_key}"
response = requests.post( "https://safeagent-production.up.railway.app/claim", headers={"Content-Type": "application/json"}, json={"request_id": request_id, "action": "stripe_charge"} ).json()
if response["status"] == "SKIP": return response.get("existing")
charge = stripe.PaymentIntent.create( amount=amount, currency="usd", customer=customer_id, idempotency_key=request_id, ) requests.post( f"https://safeagent-production.up.railway.app/settle/{request_id}", headers={"Content-Type": "application/json"}, json={"result": {"charge_id": charge.id}} ) return charge
Webhook deduplication — stable event IDs suppress repeated processing after a settled result; unresolved PENDING events stay blocked for investigation:
def handle_stripe_webhook(event):
response = requests.post( "https://safeagent-production.up.railway.app/claim", headers={"Content-Type": "application/json"}, json={"request_id": event["id"], "action": "stripe_event"} ).json()
if response["status"] == "SKIP": return {"ok": True}
provision_subscription(event) requests.post( f"https://safeagent-production.up.railway.app/settle/{event['id']}", headers={"Content-Type": "application/json"}, json={"result": {"processed": True}} )
from crewai import Agent
import sqlite3
guard_con = sqlite3.connect("safeagent_orders.db", check_same_thread=False)
PR crewAIInc/crewAI#5822 adds pluggable idempotency backends. SafeAgent's SQLite schema is compatible.
WisePick is a deterministic routing layer for agent runtimes. The integration splits capability selection from durable, idempotent execution — WisePick answers *what* and *which provider*, SafeAgent answers *whether this logical work already ran*.
Stack:
WisePick /v1/decide → DashClaw → SafeAgent → Mycelium Trails → Ba冒頭だけを表示しています。続きはリポジトリで読めます