# Flex Forward API

> Unified shipping label platform API — create labels, retrieve documents, and track shipments across multiple couriers.

## Docs

- [Create a shipping label](https://openapidocs.flexforwardship.com/api-reference/labels/create-label.md): Call this endpoint after shipment details are finalized to create a shipping label. The request is idempotent — repeating a request with the same `idempotencyKey` returns the original result without creating a duplicate label.
- [Get label document URL](https://openapidocs.flexforwardship.com/api-reference/labels/get-label.md): Use this endpoint when a printable shipping document is needed after label creation. Retrieves the airway bill document (PDF or PNG) URL for a previously created shipping label. The label must belong to the authenticated caller.
- [Get shipment tracking](https://openapidocs.flexforwardship.com/api-reference/tracking/get-tracking.md): Use this endpoint to retrieve the latest shipment status for downstream systems or customer notifications. Retrieves real-time tracking status in a unified format. The label must belong to the authenticated caller.
- [Authentication](https://openapidocs.flexforwardship.com/authentication.md): How to authenticate with the Flex Forward API
- [Changelog](https://openapidocs.flexforwardship.com/changelog.md): API and documentation updates
- [Core Concepts](https://openapidocs.flexforwardship.com/core-concepts.md): Key concepts and mental model for the Flex Forward API
- [Environments](https://openapidocs.flexforwardship.com/environments.md): Production and development environment details
- [Error Handling](https://openapidocs.flexforwardship.com/error-handling.md): HTTP status codes, error response formats, and troubleshooting guidance
- [Create an International Shipment](https://openapidocs.flexforwardship.com/guides/international-shipment.md): End-to-end guide for creating a cross-border shipping label
- [Retrieve Label Documents](https://openapidocs.flexforwardship.com/guides/label-documents.md): How to retrieve and use printable airway bill documents after label creation
- [Poll Tracking Updates](https://openapidocs.flexforwardship.com/guides/tracking-updates.md): How to retrieve and use normalized tracking data for customer notifications
- [Idempotency and Retries](https://openapidocs.flexforwardship.com/idempotency-and-retries.md): How to retry requests safely and prevent duplicate label creation
- [Flex Forward API](https://openapidocs.flexforwardship.com/introduction.md): Unified shipping API for label creation, document retrieval, and shipment tracking
- [Quickstart](https://openapidocs.flexforwardship.com/quickstart.md): Go from zero to your first shipping label in minutes
- [Support](https://openapidocs.flexforwardship.com/support.md): How to get help with the Flex Forward API
- [Versioning](https://openapidocs.flexforwardship.com/versioning.md): How the Flex Forward API handles changes and backward compatibility

## OpenAPI Specs

- [flex-forward](https://openapidocs.flexforwardship.com/flex-forward.yaml)
- [flex-forward-zh-Hant](https://openapidocs.flexforwardship.com/flex-forward-zh-Hant.yaml)
- [flex-forward-zh-Hans](https://openapidocs.flexforwardship.com/flex-forward-zh-Hans.yaml)
- [flex-forward-ja](https://openapidocs.flexforwardship.com/flex-forward-ja.yaml)
- [openapi](https://openapidocs.flexforwardship.com/api-reference/openapi.json)