--- layout: default ---
Header category

Representation Metadata

Headers describing the payload itself — its type, length, encoding, disposition, location.

33 headers
1710 provider declarations
HeaderProvidersStatus
Content-Type 433 permanent
Location 346 permanent
Link 168 permanent
Content-Disposition 131 permanent
X-WP-Total 121 de-facto
X-WP-TotalPages 121 de-facto
Content-Length 83 permanent
Content-Encoding 51 permanent
Date 50 permanent
Range 49 permanent
X-Total-Count 46 de-facto
Content-Range 26 permanent
Content-Language 23 permanent regulated
Allow 14 permanent
Server 13 permanent
Accept-Ranges 12 permanent
Content-MD5 12 obsoleted
OData-EntityId 5 permanent
Label 3 permanent
SLUG 2 permanent
Position 1 permanent
Content-Script-Type obsoleted
Content-Style-Type obsoleted
Default-Style obsoleted
Link-Template permanent
Ordering-Type permanent
ProfileObject obsoleted
Schedule-Reply permanent
Cal-Managed-ID permanent
CalDAV-Timezones permanent
Content-Base obsoleted
Content-ID deprecated
URI obsoleted

All categories

Authentication Authorization & Scope Caching Conditional Requests & Concurrency Content Negotiation Representation Metadata Connection & Transport CORS Security Policy Privacy & Consent Rate Limiting & Quota Tracing & Correlation Idempotency & Reliability Versioning & Lifecycle Integrity & Signing Async & Long-Running Cost & Metering Agent & Bot Identity

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=representation&limit=10"
Everything under a tag
curl "https://apis.io/api/v1/tags/representation"

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