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token

de facto — unregistered request 3 spellings

Declared by 46 providers across 1086 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.

tokenTokenTOKEN

Providers declaring it (46)

51offer abortion-policy-api activecampaign beds24 buk chaitin choozle coorpacademy devtron domob ezrentout finnhub fullcast getir gitea gloo hildebrand jp-morgan-chase jupyter-notebook magic-eden mem murf opkey oracle origami-risk orion-advisor-solutions picus-security postex qase seamless-ai securonix seldon shift4 slack smart-pension sofar-ocean solo-io solscan tago-io thordata twilio upsie versusgame vwo wageningen-university-research webex

Explore

All headers Authentication 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=token&limit=10"

Everything under a tag

curl "https://apis.io/api/v1/tags/token"

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