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REST API Methods and Idempotency/HEAD fetches headers only

Check resource metadata without the body.

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Section: HTTP method semantics

HEAD fetches headers only

http
http
HEAD /reports/monthly.pdf
Explanation

HEAD can be useful for existence checks, cache validation, or content-length inspection.

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GET retrieves data
Read without changing server state.
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POST creates or triggers processing
Submit a new resource or command-like workflow.
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PUT replaces state
Send a full replacement representation.
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PATCH partially updates state
Send only the fields that change.
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DELETE removes a resource
Delete one item by ID.
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OPTIONS advertises supported interactions
Inspect available methods or CORS capabilities.
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