Cursor escape hatch: BYO-key agent gateway with hard budget caps

dev tool weekend hack ••• trending

Cursor's June 2025 switch to credit-based billing has produced months of pricing-anxiety threads and bills 20x larger than expected. Most 'alternatives' just replace one opaque pricing model with another, or push you to a different IDE entirely. Demand is for a thin gateway that lets you keep Cursor (or any editor) but route through your own Anthropic/OpenAI keys with enforced per-day caps so the next invoice can't surprise you.

builder note

Hard cutoff is the feature. Soft warnings and dashboards already exist. Make it physically impossible to overspend, like a prepaid SIM card. That framing alone is the marketing.

landscape (3 existing solutions)

Every existing 'fix' either makes you change tools or still doesn't enforce a hard ceiling. Nobody ships the boring thing: a local proxy that masquerades as Cursor's backend, runs on the user's keys, and will literally stop responding at $20 today.

LiteLLM Proxy Has budget enforcement but is a generic LLM proxy. Doesn't natively present as a Cursor/Claude-Code-compatible endpoint, requires manual config, and no editor knows about it. No turn-key BYOK experience.

OpenRouter Lets you bring your own key for some models and gives spend visibility, but it's still a third-party hop, no hard daily cutoff, and Cursor's premium agent features don't route through it cleanly.

Cline / Aider (alternative editors) Solves the problem by making you switch editors. Not what the unhappy Cursor user wants. They want their workflow, with their bills.

sources (3)

other https://medium.com/@jimeng_57761/when-cursor-silently-raised... "Single heavy work session could generate $50+ in overages" 2026-04-12

other https://www.nxcode.io/resources/news/cursor-alternative-2026... "Users on Reddit and Medium described the credit counter as anxiety-inducing and opaque" 2026-05-08

other https://www.wearefounders.uk/cursor-pricing-2026-every-plan-... "Bills they didn't see coming. This is the part that has caused the most Reddit threads." 2026-04-29

cursorai-codingbyokpricingdeveloper-tools