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Closient is a product data platform that connects brands, retailers, and developers to structured product information through GTINs (Global Trade Item Numbers). The platform combines product catalog management, GS1 Digital Link resolution, supply chain event tracking (EPCIS 2.0), and proximity-based local search into a unified API.

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Who Is This For

  • Brands managing product data, resolver rules, and supply chain visibility
  • Retailers connecting POS systems and managing local inventory
  • Developers integrating product lookup, barcode scanning, or Digital Link resolution

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Core Capabilities

Product Catalog

GTIN-based product records with images, certifications, dimensions, GPC classification, and data provenance tracking. Products are identified by GTIN-14 (zero-padded from GTIN-8/12/13).

GS1 Digital Link

Resolve any GTIN to structured product data via GS1-conformant URIs. Supports Application Identifiers for batch/lot (AI 10), serial (AI 21), expiry (AI 17), and more. Configurable resolution rules with time-based routing and scope hierarchy.

EPCIS 2.0

Capture and query supply chain visibility events per ISO/IEC 19987:2024. Five event types (Object, Aggregation, Transaction, Transformation, Association) with full CBV 2.0 vocabulary support.

Local Search

Hybrid search combining semantic embeddings, lexical matching, and geographic proximity ranking. Results ranked by distance with relevance gating — closest first, not most relevant first.

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API Design

All APIs share these conventions:
ConventionDetails
Base URLhttps://www.closient.com
AuthenticationX-API-Key header with format <prefix>_<body>_<checksum>
Rate limits300/min, 10,000/day per key (custom limits available)
Pagination?page=1&page_size=25 envelope with data + pagination
ErrorsStandard { "error": { "code", "message", "status", "details" } }
IDsPublic-facing IDs use nanoid (12 chars, alphabet: aceghjkpqrtwxy346789)
Each API domain (Products, Brands, Locations, etc.) has its own OpenAPI specification and interactive playground in the API Reference.

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For Users

If you’re managing products, brands, or integrations through the Dashboard:

Managing Products

Add, edit, and organize your product catalog.

Claiming Your Brand

Establish brand ownership and data authority.

Resolver Rules

Control where your barcodes direct consumers.

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For Developers

1

Create an account

Sign up at closient.com/accounts/signup.
2

Generate an API key

Go to Settings > API Keys in your Dashboard.
3

Make your first request

See the Quickstart for a working example.