Introducing Privacy Firewall: Zero-Storage PII Redaction

January 8, 2026 • 3 min read

Today we're launching Privacy Firewall, a real-time PII redaction API built on one principle: we never store your data.

The Problem

Every application handles sensitive data. Email addresses, phone numbers, credit cards, social security numbers—it all flows through your systems. And most of it ends up somewhere it shouldn't: log files, analytics platforms, third-party services.

When (not if) a breach happens, that data becomes your liability.

Our Solution

Privacy Firewall detects and redacts 7 core PII types (plus optional person-name detection) in milliseconds. Send us text, get back clean text. We don't log requests. We don't store responses. We process everything in memory and forget it immediately.

How It Works

One API call:

curl -X POST https://zero-node.com/api/v1/redact \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Contact John at [email protected] or 555-123-4567"
  }'

Response:

{
  "redacted": "Contact John at [EMAIL] or [PHONE]",
  "findings": [
    {"type": "email", "confidence": 0.99},
    {"type": "phone", "confidence": 0.97}
  ],
  "processing_time_ms": 3
}

What We Detect

Contact info: Email, phone, fax
Identity: SSN, passport, driver's license
Financial: Credit cards, bank accounts, IBAN
Medical: MRN, health records
Technical: IP addresses, MAC addresses
Location: Physical addresses, coordinates

Performance

Latency: <5ms average
Throughput: benchmark pending; no unverified SLA claim
Availability: no SLA in the MVP; uptime will be measured before offering one
Footprint: <20MB container

Pricing

Bronze (Free): 1,000 requests/day, 2 PII types
Silver ($29/mo): 10,000 requests/day, all PII types
Gold ($99/mo): Unlimited requests, dedicated support

Get Started

Sign up at zeronode.dev/firewall
Get your API key
Start redacting

No credit card required for the free tier. No contracts. Cancel anytime.

Why Zero Node?

We're developers who got tired of building the same security infrastructure for every project. Privacy Firewall is the API we wished existed—simple, fast, and privacy-respecting by design.

Your data is yours. We just help you protect it.

Questions? Reach out at [email protected] or check out our API documentation.