> ## Documentation Index
> Fetch the complete documentation index at: https://synapse-docs.apart.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Build governed assessment and alignment journeys with deterministic, version-pinned results.

# Turn customer evidence into explainable alignment

Synapse is a multi-tenant assessment and alignment platform. Build governed
experiences, sync people from your product, run adaptive evaluations, and
receive deterministic, version-pinned results through an SDK or HTTP API.

```text Tenant and evaluation model theme={null}
Organization
  └─ App
      ├─ test environment
      └─ live environment
          └─ Subject → Enrollment → Evaluation → Result
```

<Tip>
  Your server holds an environment key. A browser receives only a short-lived
  participant token for one evaluation. Scores, answers, and profiles never
  cross apps or environments.
</Tip>

## One platform, three integration surfaces

<CardGroup cols={3}>
  <Card title="Server SDKs" icon="server">
    Use the typed TypeScript or Python client to sync subjects, enroll them,
    create sessions, and receive results.
  </Card>

  <Card title="Participant SDK" icon="window">
    Embed the governed journey in your product, or open a hosted journey with
    consent, pause and resume, and offline-safe event buffering.
  </Card>

  <Card title="Direct HTTP API" icon="brackets-curly">
    Integrate from any stack using versioned contracts, stable errors, cursor
    pagination, and idempotent writes.
  </Card>
</CardGroup>

## What Synapse owns

<CardGroup cols={3}>
  <Card title="Governed definitions" icon="diagram-project">
    Immutable experience, scorecard, context, guardrail, adaptive-policy, and
    report versions are published together as a version bundle.
  </Card>

  <Card title="Deterministic evidence" icon="fingerprint">
    Every result pins its inputs, scoring science, context fingerprint,
    guardrails, selector trace, coverage, and confidence.
  </Card>

  <Card title="Longitudinal alignment" icon="chart-line">
    One-time or recurring programs can reuse trusted evidence, detect drift,
    and deliver privacy-safe webhooks and analytics.
  </Card>
</CardGroup>

## Choose your next step

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Sync a subject and start a participant session from your backend.
  </Card>

  <Card title="Platform model" icon="sitemap" href="/concepts/platform">
    Understand tenant scope and versioned resources.
  </Card>

  <Card title="SDK guides" icon="code" href="/sdk/typescript">
    Use the Node.js, Python, browser, and React clients.
  </Card>

  <Card title="API reference" icon="book-open" href="/api/reference">
    Explore the canonical OpenAPI operations and schemas.
  </Card>
</CardGroup>