Build agents that buy, sell & stay within budget.
Spend Controls wrap every agent call with policy-driven limits — budget, category, time, recipient, cumulative, per-tx. Non-custodial by design, sub-200ms latency. Your keys, your control. Built so autonomous agents never overspend on the merchants and APIs they discover through xpay's agent-readiness layer.
Protecting 500+ agents | $2M+ in prevented overruns
The $10,000 Wake-Up Call No One Talks About
Building API monetization shouldn't be harder than building the API itself.
Runaway Costs
Your agent gets stuck in a loop at 3 AM
Burns through $5,000 before you wake up
Zero Visibility
Agents consume dozens of paid APIs
No idea where money is actually going
Manual Monitoring
Constantly checking spend logs
Living in fear of the next invoice
There's a better way to manage agent spending...
Your Agent's Financial Guardian
Transform any API endpoint into a revenue stream with enterprise-grade infrastructure.
Hard Spending Limits
Set daily, weekly, monthly caps
Agent stops when limit reached
Real-Time Alerts
Instant notifications at 50%, 80%, 100%
SMS, email, Slack alerts
Per-Agent Budgets
Assign unique budgets to each agent
Track spend across your entire fleet
AWS Proxy Endpoint
Simple 1-line code change
Route all agent traffic through us
Spending Analytics
See exactly which APIs cost the most
Identify optimization opportunities
Team Controls
Role-based spending policies
Department-level budget allocation
Protected in 3 Minutes
Simple setup process that doesn't require changes to your existing agent code.
Connect Your Agent
Replace your endpoint with our proxy
Simple one-line change to route all agent traffic through our protection layer
Set Your Limits
Configure spending rules in our dashboard
Use our intuitive dashboard to set spending limits and notification preferences
Deploy with Confidence
Your agent runs normally, we handle protection
Your agents continue working as expected with complete financial protection
Start Free, Scale As You Grow
Choose the perfect plan for your agent protection needs.
Developer
1 agent
Up to $100/month in x402 spend
Basic alerts
Email support
7-day transaction history
Team
Up to 10 agents
Unlimited x402 spend
Advanced analytics
Slack integration
Real-time alerts
Priority support
30-day transaction history
Enterprise
Unlimited agents
Custom policies
SLA support
SOC2 compliant
Custom integrations
Dedicated success manager
Unlimited transaction history
Trusted by 500+ Teams
See what developers are saying about Agent Firewall.
Saved us from a $12,000 accident when our agent hit a recursive loop. This tool is absolutely essential.
Sarah Chen
CTO, AI Startup
Essential day-one infrastructure. Should be mandatory for any x402 agent deployment.
Michael Rodriguez
Lead Engineer, TechCorp
Finally, I can sleep at night knowing our agents have proper financial guardrails in place.
Jessica Kim
Founder, AgentLabs
We've got the answers
Everything you need to know about protecting your agents from overspending.
When your agent reaches the configured spending limit, all x402 transactions are immediately blocked. You'll receive instant alerts via your preferred channels (email, SMS, Slack), and the agent will receive proper error responses to handle gracefully.
No performance impact. SmartProxy adds less than 5ms latency to x402 requests and uses a globally distributed network for optimal speed. Your agents will perform exactly the same while being protected from runaway costs.
Absolutely! You can assign unique spending limits to each agent, set department-level budgets, and create custom policies based on agent types or use cases. Each agent gets its own protection profile with independent monitoring and alerts.
We maintain 99.9% uptime with global redundancy across multiple cloud providers. In the unlikely event of an outage, you can instantly switch back to direct x402 endpoints. Enterprise customers get failover options and SLA guarantees.
- Real-time spending breakdown by agent, API, and time period
- Cost attribution to specific customers or projects
- Performance metrics including response times and success rates
- Anomaly detection for unusual spending patterns
- Exportable reports for accounting and optimization
Yes, we're SOC2 Type II compliant with enterprise-grade security. All transaction data is encrypted in transit and at rest. We only store metadata necessary for monitoring and never access your actual API request/response content. You maintain full control over your data.
Yes! SmartProxy integrates with popular tools like Datadog, New Relic, Grafana, PagerDuty, and Slack. We provide webhooks, REST APIs, and pre-built integrations to connect with your existing infrastructure and workflow.
Still have questions?
Our security team is here to help you protect your agents effectively.
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