BYOK Architecture: Why Your API Keys Should Never Leave Your Infrastructure

Most LLM API gateways are man-in-the-middle proxies. Here's why direct connection matters — and how Correctover achieves reliability without ever seeing your data.

The Gateway Problem

When you use an LLM API gateway, your requests flow through their infrastructure:

Your App → Gateway Server → LLM Provider
                ↑
         They see everything

This means the gateway provider can observe:

• Your prompts — every question, instruction, and context you send
• Your responses — every generated answer
• Your API keys — you gave them your credentials or they issued their own
• Your usage patterns — when, how often, which models
• Your costs — they can add markup you'll never see

Three Lies Gateways Tell

"We don't log your data"

Even without intentional logging, infrastructure processes every request. Logs, backups, and debug traces exist. A subpoena or breach exposes everything.

"We pass through at cost"

Most gateways add markup — some transparent, most hidden. When they control billing, you never see the actual provider invoice.

"We need to see traffic for reliability"

False Contract validation and failover can happen entirely client-side. You don't need a middleman to verify schema compliance or manage provider switches.

The BYOK Direct Connection Model

Your App → LLM Provider (Direct)
    ↕
Correctover (Local SDK)
    - 6-dimension contract validation
    - Drift detection
    - Failover management
    - Never sees your data

Key properties:

• Your keys connect directly to OpenAI, Anthropic, DeepSeek, etc.
• Correctover runs locally as a Python/JS SDK, not a proxy
• Zero data passes through any third-party server
• Zero markup — you pay what the provider charges, nothing more

Cost Comparison

Processing 1M tokens/day through a gateway with 20% markup:

Enterprise Implications

For organizations building AI features:

• Data residency — routing through a third party may violate data sovereignty requirements
• Compliance — SOC 2, HIPAA, GDPR all require control over who accesses data
• Vendor lock-in — gateway downtime = your entire AI pipeline downtime
• Audit trails — can't prove data wasn't accessed if it passed through someone else's servers

Correctover: BYOK by Architecture

from correctover import CorrectoverEngine

engine = CorrectoverEngine.create({
    "providers": [
        {"name": "openai", "api_key": os.environ["OPENAI_API_KEY"]},
        {"name": "anthropic", "api_key": os.environ["ANTHROPIC_API_KEY"]},
    ],
    "contract": {
        "max_latency_ms": 5000,
        "require_complete_response": True,
    }
})

# Your key connects directly. Correctover validates locally.
result = await engine.chat("Your prompt here")

• Never has been a token relay, distributor, or reseller
• Never will be — the architecture makes it impossible
• 6-dimension contract validation: 22µs (P50)
• MAPE-K failover decisions: 50-100µs