Last updated: April 16, 2026
This policy explains what data QuickSilverPro (operated by MachineFi Inc.) collects when you use our API, how we use it, and your rights. We aim to collect the minimum needed to operate the service.
Account data: email address you provide on sign-up.
API keys: we store only a cryptographic hash; the raw secret is shown once at creation and not recoverable.
Usage metadata: timestamps, model name, token counts (prompt and completion), request duration, and per-request cost — for billing and abuse detection.
Payment data: handled by Stripe. We see the last four digits of the card and the billing email; we do not see full card numbers.
We do not persist the contents of your API prompts or model completions. Requests are processed in memory during the call and discarded on completion. Infrastructure partners we use for compute may have their own retention policies — see Section 5.
We use collected data to: operate and bill the service, enforce usage limits, investigate abuse, send transactional emails (receipts, security notices), and comply with legal obligations. We do not sell your data to third parties, and we do not train machine-learning models on your prompts or completions.
Account metadata is kept while your account is active and for 12 months after closure (for tax and accounting records). Usage logs are kept for 90 days. You can request earlier deletion by emailing hello@quicksilverpro.io; we will honor verified requests within 30 days subject to legal retention requirements.
We share data only with the providers required to operate the service.
| Provider | Purpose | Data |
|---|---|---|
| Stripe (USA) | Payment processing | Email, card last4, billing address |
| Cloudflare (USA) | Edge / DDoS / DNS | IP addresses, request metadata |
| Railway (USA) | Application hosting | Account data, usage logs |
| Compute partners | Model execution | Prompt/completion contents for each call |
Compute partner selection may vary by model and region; we publish a current list on request for enterprise customers under NDA. Each partner has its own privacy and retention policy.
Data in transit is protected with TLS 1.2+. API keys are stored as SHA-256 hashes. Stripe webhook signatures are verified against an HMAC secret. Our backend runs on Railway (SOC 2 Type II baseline). We do not persist prompt content.
You can request access to, correction of, export of, or deletion of your personal data by emailing hello@quicksilverpro.io. California residents have additional rights under the CCPA, and EU/UK residents under the GDPR, including the right not to be subject to unlawful automated decision-making. We will verify your identity before acting on requests.
We use localStorage only, to remember your signed-in API key across visits. We do not use tracking cookies, analytics cookies, or ad networks.
The service is not intended for use by anyone under 18.
We will announce material changes to this policy by email at least 30 days before taking effect.
MachineFi Inc., 68 Willow Road, Menlo Park, CA 94205, USA — hello@quicksilverpro.io