AgentGuard sits in front of your agent's API calls with a hard spend cap and a kill switch — so a runaway loop costs you a few dollars, not a few thousand.
Get your AgentGuard key — freeNo code rewrite. Point your existing agent at AgentGuard instead of calling your AI provider directly.
Sign up, pick a spend cap in dollars. We never see or store your provider's API key — you send it with every call, we just pass it through.
Swap one URL. Your agent calls AgentGuard instead of OpenAI/Anthropic directly, with your usual API key and your AgentGuard key attached.
The instant your spend hits your cap, we return an error before the call reaches your provider. Hit the kill switch yourself anytime from the dashboard.
POST https://agentguard.allmomentumlab.com/api/v1/proxy
Authorization: Bearer <your OpenAI key>
x-agentguard-key: <your AgentGuard key>
Content-Type: application/json
{ "model": "gpt-4o-mini", "messages": [...] }
Pick the highest spend cap you want available to you. Downgrade or cancel anytime.