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

# API Reference

> Explore 18 domain-specific APIs with interactive playgrounds.

Closient exposes 18 RESTful APIs, each with its own OpenAPI specification and interactive playground. Browse the full reference in the **[API Reference](/api-reference/overview)** tab above.

## Most Used APIs

<CardGroup cols={2}>
  <Card title="Products" icon="barcode" href="/api-reference/products">
    GTIN-based product catalog with automatic normalization, data provenance, and confidence scores.
  </Card>

  <Card title="Search" icon="magnifying-glass" href="/api-reference/search">
    Hybrid search combining semantic embeddings, lexical matching, and geographic proximity.
  </Card>

  <Card title="GS1 Digital Link" icon="link" href="/api-reference/resolver">
    Resolve GTINs via Digital Link URIs with configurable scope hierarchy and time-based routing.
  </Card>

  <Card title="Integrations" icon="plug" href="/api-reference/integrations">
    POS connections (Shopify, Square, Clover, Lightspeed) and webhook management.
  </Card>
</CardGroup>

## All APIs

| API                                             | Description                                       |
| ----------------------------------------------- | ------------------------------------------------- |
| [Account](/api-reference/account)               | Users, organizations, memberships, API keys, RBAC |
| [Products](/api-reference/products)             | GTIN product catalog, images, categories, groups  |
| [Brands](/api-reference/brands)                 | Brand ownership, claiming, verification           |
| [Locations](/api-reference/locations)           | Physical locations with PostGIS coordinates       |
| [Retailers](/api-reference/retailers)           | Offers, inventory, pricing, regional overrides    |
| [Search](/api-reference/search)                 | Hybrid search with conversational sessions        |
| [GS1 Digital Link](/api-reference/resolver)     | GTIN resolution, scope hierarchy, routing rules   |
| [EPCIS 2.0](/api-reference/epcis)               | Supply chain events per ISO/IEC 19987:2024        |
| [Integrations](/api-reference/integrations)     | POS connections, webhooks, delivery tracking      |
| [Billing](/api-reference/billing)               | Subscriptions, resolver tiers, usage metering     |
| [Scanner](/api-reference/scanner)               | Barcode and image scanning, vision extraction     |
| [Compliance](/api-reference/compliance)         | Recalls, safety notices, traceability             |
| [Certifications](/api-reference/certifications) | Certification management and verification         |
| [Sustainability](/api-reference/sustainability) | Environmental data and certifications             |
| [Notifications](/api-reference/notifications)   | Multi-channel delivery (email, Slack, SMS)        |
| [Advertising](/api-reference/advertising)       | Ad campaigns, impressions, reporting              |
| [Dashboard](/api-reference/dashboard)           | Analytics and performance snapshots               |
| [Content](/api-reference/content)               | Product readiness and content management          |

<Card title="Explore the Full API Reference →" icon="arrow-right" href="/api-reference/overview">
  Interactive playgrounds, request/response examples, and complete parameter documentation for all 18 APIs.
</Card>