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Brandfetch publishes the standard discovery documents at their well-known locations, so that an agent, a crawler or an assistant can learn what exists, how to authenticate and where the APIs are without a person reading this site for it. Every document below is live and cacheable, needs no credential, and is served with permissive CORS.

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Documents

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Hints in every response

Pages on brandfetch.com carry an HTTP Link header pointing at the API catalog (rel="api-catalog"), the OpenAPI description (rel="service-desc"), this documentation (rel="service-doc") and llms.txt (rel="describedby"), so a client that fetches any page learns where the rest is. Append .md to a page’s path, https://brandfetch.com/pricing.md for example, to receive it as Markdown. robots.txt declares the site’s content signals, search=yes, ai-input=yes, ai-train=no: indexing and use as model input are welcome, training is not.

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Paying without an account

The Brand API and the Brand Context API describe their own price to anyone who asks without a credential: the 402 they answer with carries an x402 challenge and MPP challenges in WWW-Authenticate. The OpenAPI description states each paid operation’s terms in MPP’s x-payment-info extension (and the service in x-service-info), and the payment routes declare themselves to x402 discovery services. Pay per request explains the flow; standing access is the same payment buying a prepaid API key.