Content Negotiation
The process where client and server agree on the response format using HTTP Accept headers. Enables serving JSON, XML, or HTML from the same endpoint.
What is Content Negotiation?
The process where client and server agree on the response format using HTTP Accept headers. Enables serving JSON, XML, or HTML from the same endpoint.
Content Negotiation is a intermediate-level concept that sits in the Web & Content Delivery area of system design. Engineers reach for it whenever they need to reason about real-world trade-offs in that space — not just for textbook correctness, but because real production systems at companies like Netflix, Amazon, and Google make these decisions every day.
If you want to go deeper than this definition — with diagrams, code, and a quiz to lock it in — work through the "Content Negotiation" lesson linked below. It walks through the why, the mechanism, the trade-offs, and how the giants actually use it in production.
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See also
Related glossary terms you might want to look up next.
HTTP
The protocol powering the web. A request-response model where clients ask for resources and servers respond. Stateless by design.
REST API
An architectural style for building APIs using standard HTTP methods (GET, POST, PUT, DELETE). Resources are identified by URLs.
JSON
JavaScript Object Notation: a lightweight text format for data interchange using key-value pairs and arrays. The lingua franca of web APIs.