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Spend Brake icon

Spend Brake

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Spend Brake is a self-hosted egress proxy that puts hard dollar caps on paid APIs. Swap one base URL and one key: every request is priced per SKU before it leaves, checked against your caps in one atomic step, and refused with a clear 402 once a cap would be crossed.

Live budget per scope with kill switch

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Since

  • New

Updated

  • Updated Nov 2026

Platforms

  • Online
  • Self-Hosted
  • Docker
  • Software as a Service (SaaS)
Events log showing requests blocked at the cap
Hard caps per org and per key
+2
Spend over time by key
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What is Spend Brake?

Spend Brake is a self-hosted egress proxy that puts hard dollar caps on paid APIs. Swap one base URL and one key: every request is priced per SKU before it leaves, checked against your caps in one atomic step, and refused with a clear 402 once a cap would be crossed. Caps can be set per org, key, SKU, environment, agent and agent session, per day and per month. Google Maps Platform, Twilio, Mapbox, HERE, Tavily, Exa, Brave and SerpApi are built in, and any other API can be added as a custom API. Your real provider keys never leave Spend Brake; clients only hold revocable virtual keys. Self-host the Apache-2.0 core with docker compose, or use the hosted free plan (1 key, $50/month of protected spend, no card).