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Cache-Control

IANA permanent response RFC 9111 reached by regulation 3 spellings

Declared by 144 providers across 8324 published specification files in the APIs.io network.

What this header is for, and how to use it →

A count here is providers whose published contract declares this header — not providers who send it. Response headers set at the edge rarely appear in an OpenAPI at all, so a low number can measure documentation practice rather than deployment.

Spelled 3 ways

HTTP field names are case-insensitive (RFC 9110 §5.1), so every spelling below is the same header on the wire. A contract is not the wire: generated clients key off the string, and a developer reading two of these sees two different headers.

Cache-Controlcache-controlCACHE-CONTROL

Reached by regulation

Basis: evidentiary. No law names this header; it is the deployed control for an obligation that regulation does impose. Observable at the edge, without credentials.

hipaa glba

The registry

Statuspermanent
ReferenceRFC 9111, Section 5.2: HTTP Caching

Providers declaring it (144)

73-strings acronis adanos-market-sentiment-api adobe-suite adp aib-group-uk aldermore algolia amazon-s3 apa apache-couchdb api-snap appsmax-rest-api-v1 backpack bank-of-ireland-uk bank-of-scotland barclays bazaarvoice bird blng bread-financial britive btc-war-live-market-data-api ccp-games chaoss chili-piper cloudflare-r2 co-operative-bank cohere columbia confident-cannabis confident-lims constructorio continuous-delivery-foundation coorpacademy coventry-building-society crob-at cyclecalcs daring-foods deliverect docker domscan dream-sports electric-sql engineering-platform entergram etoro euler eve-online extreme-networks ezoic factset first-direct game-of-thrones gb-bank gemini-trust gist halifax here heyform honeycomb-io hopper-com interchecks jp-morgan-chase just-eat kallyope keboola kimi-moonshot kudosity leap ledger leeds-building-society limble-cmms limitless-ai listmonk lloyds-banking-group mem mercedes-me method-financial methodfi metro-bank mettle microsoft-azure monument-bank moonshot-ai nationwide-building-society netbird newtqnia nhost oauth open-banking-uk opengov openmercantil openrelay oracle oracle-cloud oracle-hospitality oracle-platforms osmaura paragon-bank peertube planomy-tax-data podman primitive principality-building-society process-street prorataai pruna-ai punchh qfex recognise-bank render rentberry roadsync rocket-lawyer safello sageox salesforce saml santander-uk secure-trust-bank shawbrook-bank shyft skipton-building-society socialcrawl spectro-cloud starling-bank superrare tealium tenable totalis tradeverifyd tsb-bank understudy-labs usacallerlookup userpilot usertesting virgin-money-uk vtex waodao wazo weatherbys-bank worldcat xquik-api

Explore

All headers Caching Guidance on headers.apievangelist.com

Work with this as data

Every header here is available over the APIs.io API and to AI agents over MCP. HTTP Headers is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for http headers

3 MCP tools reach this
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
Search the catalog
curl "https://apis.io/api/v1/search?q=cache-control&limit=10"
Everything under a tag
curl "https://apis.io/api/v1/tags/cache-control"

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