---
title: "KYE™ Developers — Quickstart"
description: "Three steps. One key. You ship."
url: https://kyeprotocol.com/developers/quickstart/
lang: en
source: "KYE Protocol"
---

# Quickstart

Three steps. One key. You ship.

[Quickstart →](https://kyeprotocol.com/developers/quickstart/) [API reference](https://kyeprotocol.com/developers/api/)

Five steps from `npm install` to a signed evidence pack.

Plain Q&A

## Plain Q&A

Short questions. Short answers.

- **What is KYE™?** A protocol for AI governance.
- **What does the SDK do?** It signs every call. It verifies every reply.
- **Which language?** TypeScript, Python, or Go.
- **Do I need a key?** Yes. You keep it.
- **Free to use?** Yes. Apache 2.0.
- **Sandbox tokens?** Free. One click.
- **Pilot tokens?** Free for 30 days.
- **Do you log my data?** No. Not ever.

### Install the SDK

```
npm install @kye/sdk
export KYE_API_KEY=sk_test_…
```

### Create a governed entity

```
import { KyeClient } from "@kye/sdk";
const kye = new KyeClient({ apiKey: process.env.KYE_API_KEY });

const agent = await kye.entities.create({
  entity_type: "ai_agent",
  display_name: "KYC Triage Agent",
  owner_entity_id: "kye:user:acme.compliance_lead",
  accountable_entity_id: "kye:org:acme",
  purpose: "Triage KYC packages and flag for human review when uncertain.",
  lifecycle_state: "pilot",
  approved_capabilities: ["kyc.verify", "kyc.read"],
  prohibited_capabilities: ["kyc.approve_final"]
});
```

### Grant a delegation

```
const delegation = await kye.delegations.create({
  actor: agent.entity_id,
  principal: "kye:user:acme.compliance_lead",
  subject: "kye:business:retail_customer_segment",
  scope: ["kyc.verify", "kyc.read"],
  expires_at: "2026-12-31T00:00:00Z"
});
```

### Make a decision

```
const decision = await kye.decisions.create({
  actor: agent.entity_id,
  principal: "kye:user:acme.compliance_lead",
  capability: "kyc.verify",
  action: "kyc.verify",
  context: { customer_id: "cust_001", region: "EU" }
});

console.log(decision.decision, decision.reason_code);
// → "allow" "policy_allow_default"
```

### Download an evidence pack

```
const pack = await kye.evidencePacks.create({
  use_case_id: "kye:use-case:acme.kyc_triage",
  period: { start: "2026-01-01", end: "2026-03-31" }
});

// Verify locally:
//   kye-cli evidence verify pack.json --key-id kye-evidence-signing-2026-q1
```

The pack contains: entity authority records, authority gates, commit boundaries, review paths, runtime decision examples, and a revocation drill log — all hash-anchored and Ed25519-signed.

[Browse the full API →](https://kyeprotocol.com/developers/api/)

Canonical KYE™ surfaces referenced on this page: [Evidence Pack™](https://kyeprotocol.com/evidence-pack/) · [KYE Protocol™](https://kyeprotocol.com/).