CardNexus Public API

The CardNexus Public API provides programmatic access to the CardNexus marketplace and catalogue — games, expansions, and products across Magic: The Gathering, Pokémon, One Piece, and the other games CardNexus supports, plus your own inventory, listings, and orders.

Base URL and versioning

All endpoints sit under /v1. The production base URL is https://public-api.cardnexus.com/v1.

Authentication

Every request carries a single bearer token (an API key) in the Authorization header. See Authentication and API keys.

Language

Send an Accept-Language header to work in another language — en, fr, it, es, or de, with or without a region (fr and fr-FR,fr;q=0.9 both work). On search endpoints your name text is matched in that language where a translation exists, falling back to English, and product and expansion names in product results come back in it where a translation exists. Without the header, everything is English.

Guides

Start with the Quickstart. The full documentation hub has guides and recipes for every part of the API.