# Show HN: SentinelGate – Drop prompt injections at Token 0 before LLM inference

> Source: <https://sentinelgate.dev>
> Published: 2026-10-20 12:38:01+00:00

### Developer

For individual builders, staging environments, and prototype validation.

- 50,000 requests / month
- 0-token prefill veto
- .sent attestation hashes
- Public notary lookups

[Checkout Developer](https://buy.stripe.com/00w4gA7ta8Vq5PMeQj2Ry05)

            Cryptographic execution control for high-stakes AI. SentinelGate halts adversarial injections and tool hijacks at Token 0—evaluating prompt kinematics in-memory with sub-millisecond overhead, before execution, and before token spend. Every action is sealed with tamper-evident Ed25519 evidence bags engineered for **ISO 20022 financial rails**.
          

Run a public kinematic preview — no API key required. Emerald = permit. Coral = Phase III topological collapse.

```
{
  "status": "resting",
  "note": "Awaiting audit — Run Audit or select a preset"
}
```

Provisioned automatically via billing webhooks — keys minted as `sk-sent-XXXX` into the Sentinel ledger.

For live production systems requiring high throughput and strict veto enforcement.

Dedicated clusters, custom kinematic threshold tuning, and financial rail SLAs.

`XDP_DROP` sub-50µs socket severing)
            or email directly: [\[email protected\]](https://sentinelgate.dev/cdn-cgi/l/email-protection#71181f171e3105191e19100507141f05040314025f121e1c)

Point any OpenAI-compatible client at SentinelGate — swap the base URL and keep your existing SDK.

``` python
from openai import OpenAI

client = OpenAI(
    api_key="sk-sent-XXXX",
    base_url="https://api.sentinelgate.dev/v1",
)

completion = client.chat.completions.create(
    model="meta-llama/Llama-3.3-70B-Instruct",
    messages=[{"role": "user", "content": "Execute financial database reconciliation."}],
)
```

Differentiation, financial rails, integration, retention, veto mechanics, and key operations.

`SplmtryData`) envelopes.
          `base_url` to `https://api.sentinelgate.dev/v1` and pass your `sk-sent-...` API key. Prompts, schemas, streaming, and tool calls work out of the box with zero code refactoring.
          `kinematic_security_veto`, and drops the socket before upstream tokens are consumed. The client receives an Ed25519-signed evidence bag detailing the thermodynamic state coordinates and attestation hash for audit logging.