io.github.azender1/safeagent

Official

by azender1 · Python

Exactly-once execution guard for AI agents. Prevents duplicate payments and webhooks on retry.

Prevents duplicate payments and webhooks when AI agents retry failed operations.

Topics

ai-agentsidempotencyreliabilityagentagent-infrastructureagent-safetyai-infrastructureautomationexecution-controlreliableworkflow-systemmcpmodel-context-protocol

README.md14 KBView on GitHub

SafeAgent — Execution Guard for AI Agents

SafeAgent — Exactly-Once Execution for AI Agents

POST /claim · safeagent-production.up.railway.app
Dashboard: safeagent-dashboard-2.vercel.app

bash

# 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"}'
# → {"status":"PROCEED","request_id":"..."}

# Settle after the action fires
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"}}'
# → {"status":"committed","request_id":"..."}

# Retry with the same request_id — returns SKIP
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"}'
# → {"status":"SKIP","request_id":"...","existing":{...}}

# Free test endpoint — same logic, limited to 10 calls per IP
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"}'
# → {"status":"PROCEED","request_id":"...","test":true,"calls_remaining":9}

Indexed on Bazaar.

Mycelium Trails

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.

Verified on Soma

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.

Integrator badge — verified external client running Mycelium Trails in production
Live trails — https://argentum-api.rgiskard.xyz/dashboard/trails?client=safeagent-prod
Public audit — any auditor can verify SafeAgent executions independently

What it does

SafeAgent is an exactly-once execution guard. It prevents AI agents and SaaS applications from firing the same action twice — on crash-retry, duplicate signal, webhook replay, or concurrent execution across multiple instances.

Every action gets a stable request_id derived from what the agent is doing and when. The first call commits. Every subsequent call with the same key returns SKIP and the original result. No double charges. No double emails. No double orders. No duplicate webhooks.

State machine: PENDING → COMMITTED | SKIP

Common failure modes SafeAgent prevents:

Scenario	Without SafeAgent	With SafeAgent
Stripe charge times out, retry fires	Customer charged twice	Second charge returns SKIP
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	Second call returns SKIP

The stack

SafeAgent is the exactly-once enforcement layer in a formally specified agent execution integrity stack:

code

Polaris (commit-gated authorization)
└── AgentGraph safety verdict (pre-execution safety gate)
    └── SafeAgent (exactly-once execution guard)  ← you are here
        └── Nobulex (signed bilateral receipt)
            └── Mycelium Trails (on-chain anchor)

Each layer is independently authored and independently verifiable. None trusts the others.

EU AI Act Art. 12 — enforcement deadline August 2, 2026. SafeAgent provides tamper-evident execution logs for agent compliance. The full stack satisfies "tamper-evident" independently of platform logs.

API

POST /claim

Gate an action. Returns PROCEED on first call, SKIP on any repeat.

Request body:

json

{
  "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:

json

{ "status": "PROCEED", "request_id": "order:TQQQ:buy:6:2026-05-19T13:31:00-04:00" }

Retry with the same payload:

json

{ "status": "SKIP", "request_id": "order:TQQQ:buy:6:2026-05-19T13:31:00-04:00", "existing": {...} }

POST /settle/{request_id}

Settle a claim after the action fires. Advances status from PENDING to COMMITTED.

bash

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"}}'

json

{ "status": "committed", "request_id": "..." }

POST /claim/test

Free test endpoint — same logic, no payment required. Limited to 10 calls per IP total.

bash

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"}'

json

{ "status": "PROCEED", "request_id": "...", "test": true, "calls_remaining": 9 }

GET /audit

Full claim history. Filter by agent_id, action, status, or timestamp range.

bash

curl "https://safeagent-production.up.railway.app/audit?agent_id=bot-1&status=COMMITTED"

json

{"items": [...], "total": 5, "limit": 100, "offset": 0}

Parameters: agent_id, action, status, from_ts, to_ts, limit (max 1000), offset.

Integration

Python

python

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()

# Usage
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")

SaaS (Stripe / email / webhooks)

python

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, customer=customer_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 — Stripe, GitHub, and Twilio all guarantee at-least-once delivery. SafeAgent turns at-least-once into exactly-once:

python

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}}
    )

CrewAI

python

from crewai import Agent
import sqlite3

guard_con = sqlite3.connect("safeagent_orders.db", check_same_thread=False)
# ... same guard pattern, keyed on tool_name + input hash + session_id

PR crewAIInc/crewAI#5822 adds pluggable idempotency backends. SafeAgent's SQLite schema is compatible.

WisePick

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:

code

WisePick /v1/decide → DashClaw → SafeAgent → Mycelium Trails → Base/Arbitrum

Adapter: adapters/safeagent_adapter.py
Integration docs: docs/integrations/safeagent.md
Integration thread: SafeAgent #9

Local guard (embedded SQLite)

The same guarantee without the network call. Drop this into any Python agent:

python

import sqlite3

_SA_DB = "safeagent_orders.db"
_sa_con = sqlite3.connect(_SA_DB, check_same_thread=False)
_sa_con.execute("""CREATE TABLE IF NOT EXISTS orders (
    request_id TEXT PRIMARY KEY,
    result     TEXT,
    status     TEXT DEFAULT 'PENDING',
    created_at TEXT DEFAULT (datetime('now'))
)""")
_sa_con.commit()

def place_order_with_guard(symbol, qty, side, bar_ts):
    request_id = f"order:{symbol}:{side}:{qty}:{bar_ts}"

    _sa_con.execute(
        "INSERT OR IGNORE INTO orders (request_id, status) VALUES (?, 'PENDING')",
        (request_id,)
    )
    _sa_con.commit()

    row = _sa_con.execute(
        "SELECT status, result FROM orders WHERE request_id = ?",
        (request_id,)
    ).fetchone()

    if row and row[0] == 'COMMITTED':
        print(f"SAFEAGENT SKIP: {request_id}")
        return row[1]

    result = place_order(symbol, qty, side)

    _sa_con.execute(
        "UPDATE orders SET status='COMMITTED', result=? WHERE request_id=?",
        (json.dumps(str(result)), request_id)
    )
    _sa_con.commit()
    return result

Case study: crash-retry duplicate prevention

A trading bot fires a market order to buy 6 shares of TQQQ. The broker accepts it. The bot crashes before updating state. On restart — same signal, same bar — the bot fires again. The broker fills it twice. The agent now holds 12 shares when it intended to hold 6.

This is not theoretical. It happens on any unhandled exception between order submission and state persistence.

SafeAgent derives a stable key before touching the broker:

code

request_id = "order:TQQQ:buy:6:2026-05-19T13:31:00-04:00"

First call: PROCEED. Side effect fires. Settle writes COMMITTED.
Crash and retry: SKIP. Broker never touched again.

Case study: live duplicate blocking — May 21, 2026

Six confirmed SKIP events from a live session on the full stack: DashClaw, SafeAgent, Mycelium Trails, Base/Arbitrum, broker Alpaca.

0942 ET: duplicate buy TQQQ qty=6 blocked, $452
0947 ET: duplicate add TQQQ qty=6 blocked, $452
0949 ET: duplicate sell TQQQ qty=12 on flip, $902
1000 ET: duplicate entry TQQQ qty=6 blocked, $454
1014 ET: duplicate sell TQQQ qty=18 on V20 flip, $1,350
1106 ET: duplicate SQQQ add during scale-in, $43

Full session data: https://gist.github.com/azender1/b9112b6519c935df4a75cb05cd250e26

Conformance

SafeAgent participates in the A2A cross-implementation conformance corpus. Byte-verified fixtures across four independent implementations:

kenneives (agentgraph) — verifier-attestation-v0: 30/30 ✓
evidai (LemonCake) — gated-preflight-v1: 33/33 ✓
haroldmalikfrimpong-ops (agentid) — independent verifier ✓
SafeAgent — exactly-once-v1.1 ✓

A2A #1920 closed. All four implementations satisfy freshness and replay requirements.

Canonical `action_ref` derivation

JCS (RFC 8785), aligned with argentum-core, Nobulex, and APS:

python

import hashlib
import rfc8785

def compute_action_ref(
    agent_id: str,
    action_type: str,
    scope: str,
    timestamp: str,  # RFC 3339 UTC, 3-digit ms: "2026-05-15T10:00:00.123Z"
) -> str:
    payload = {
        "agent_id": agent_id,
        "action_type": action_type,
        "scope": scope,
        "timestamp": timestamp,
    }
    canonical = rfc8785.dumps(payload)
    return hashlib.sha256(canonical).hexdigest()

timestamp is an RFC 3339 UTC string with exactly 3 millisecond digits. The trailing Z is mandatory.

Conformance fixtures: giskard09/argentum-core tag action-ref-v1.0

Deployment

Railway · Serverless OFF · always-on
PyPI: pip install safeagent-exec-guard
npm: npm install n8n-nodes-safeagent
MCP Registry: io.github.azender1/safeagent
Dashboard: safeagent-dashboard-2.vercel.app

License

Apache-2.0

Install

claude_desktop_config.json

{
  "mcpServers": {
    "safeagent": {
      "command": "uvx",
      "args": [
        "safeagent-exec-guard"
      ]
    }
  }
}

Topics

SafeAgent — Execution Guard for AI Agents

Mycelium Trails

Verified on Soma

What it does

The stack

API

POST /claim

POST /settle/{request_id}

POST /claim/test

GET /audit

Integration

Python

SaaS (Stripe / email / webhooks)

CrewAI

WisePick

Local guard (embedded SQLite)

Case study: crash-retry duplicate prevention

Case study: live duplicate blocking — May 21, 2026

Conformance

Canonical action_ref derivation

Deployment

License

Install

Canonical `action_ref` derivation