Prompt Proxy
The billing back-end for your AI apps
SubscriptionPayments267 impressions#26 of its week
More Payments tools →74 free dev tools →
Prompt Proxy provides billing, credit management, and auth integration for AI apps with three lines of code.
- for
- AI app developers who need quick payment and usage tracking.
- pricing
- freemium · free trial
Key features
- Payment Provider Sync — Connect Stripe, Polar, Google Play or Apple App Store to sell credits and handle webhooks automatically.
- Credit Management — Deduct user credits per LLM call with usage-based pricing (per-token, per-request, or rate-limited).
- Auth Integration — Link existing Firebase, Supabase or Auth0 JWTs to user credits without writing auth code.
- Fraud Protection — Built-in rate limiting and abuse detection to protect revenue.
- LLM Provider Support — Proxy calls to OpenAI, Anthropic or OpenRouter via any SDK such as Langchain.
- Developer Dashboard — Real-time credit tracking, subscription management and 99.9% SLA monitoring.
Use cases
- Charge users per token for a chatbot built on OpenAI.
- Sell AI credits in a mobile app distributed via Google Play or Apple App Store.
- Add usage-based billing to an internal tool using existing Firebase auth.
- Prevent over-use of costly LLM calls with per-user rate limits.
Prompt Proxy vs alternatives
 Prompt Proxy | .png?width=64) Dodo Payments | .png?width=64) Saaslogic |  Webhook Watch |  Serial Subscriptions | |
|---|---|---|---|---|---|
| Best for | Plug-and-play AI billing backend | General e-commerce payments | Full-stack SaaS billing | Stripe webhook monitoring | Unified SaaS integration |
| Pricing | Freemium | Free | Subscription | Subscription | Subscription |
| DevHunt upvotes | 0 | 17 | 1 | 4 | 1 |
| Launched | Jan 2026 | Feb 2025 | May 2026 | Mar 2024 | May 2026 |
- Prompt Proxy vs Dodo Payments: Focuses on global payment processing, not specialized for AI credit billing.
- Prompt Proxy vs Saaslogic: Provides broader SaaS subscription management beyond AI usage tracking.
- Prompt Proxy vs Webhook Watch: Monitors Stripe webhooks only, without auth or credit management for AI.
- Prompt Proxy vs Serial Subscriptions: Unifies auth, payments and usage but targets generic SaaS, not AI-specific credit flows.
Prompt Proxy FAQ
How do I connect my payment provider?+
Link Stripe, Polar, Google Play or Apple App Store in the PromptProxy dashboard; payments and webhooks are synced automatically.
Do I need to write authentication code?+
No, just add the user's JWT to the X-PromptProxy-AuthToken header; PromptProxy validates it and tracks credits.
Can I set custom pricing models?+
Yes, you can price per token, per request, or apply rate-limited plans.
Which LLM APIs are supported?+
OpenAI, Anthropic and OpenRouter are supported; you can use any SDK like Langchain or the OpenAI SDK.
Is there an SLA for uptime?+
PromptProxy offers a 99.9% uptime SLA included in all plans.
What happens if I exceed my request quota?+
Requests beyond the plan limit are blocked, preventing unexpected charges.
Summarized by DevHunt from prompt-proxy.com · Sep 29, 2026. Details may change; check the official site.
