Capstop
A hard dollar cap for every AI agent run
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A local proxy between your agent and OpenAI. Give each run a dollar cap; when the next call could cross it, your code gets a 402 and the call never goes out. Key goes only to OpenAI. Open source, early, OpenAI chat calls only, tested on Linux.
PH · launched Nov 3, 2026 · 2 upvotes (top 19%) · 0 views
Niche: ai api gateways and proxies · 336 launches, 7 in the last 7 days ▼ -46% · Explore this niche →
Category and tags
- Horizontal
- Model & infra
- Developer
- AI-native
- Commercial product
- Open Source
- Developer Tools
- Artificial Intelligence
- GitHub
Visit website ↗ Source listing ↗
More like this: all 336 launches in ai api gateways and proxies →
Could you build this?
Yes A local HTTP proxy that counts tokens or estimated cost per run and returns 402 when a cap would be exceeded is a small, self-contained service. Vibe coding handles it well.
Competitors
Other products that read as similar to this one : 520 launches clear the similarity bar, closest 8 shown.
Attention rank: #122 of 521 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 326 days after the earliest competitor.
- unused.market · ph · 2026-10-25 · 1 upvotes · similarity 0.46
- Tokencap · hn · 2026-04-04 · 7 upvotes · similarity 0.45
- OSPA Fuse · ph · 2026-11-09 · 1 upvotes · similarity 0.45
- Credlier - The Financial OS for AI · ph · 2026-09-23 · 8 upvotes · similarity 0.45
- Cap.Guru MCP · ph · 2026-11-12 · 1 upvotes · similarity 0.44
- BillCurfew · ph · 2026-11-11 · 1 upvotes · similarity 0.44
- Citadel Predict · ph · 2026-09-15 · 2 upvotes · similarity 0.43
- ai-api-relay-no-vpn-fr · github · 2026-09-29 · 26 upvotes · similarity 0.43
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.