Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 2 Complete, well-documented, and agent-ready

Dropbox Sign (HelloSign) Fax APIThe Fax API from Dropbox Sign (HelloSign) — 4 operation(s) for fax.71.4 Zoom Phone Fax APIThe Fax API from Zoom Phone — 6 operation(s) for fax.69.5

Strong 4 Solid coverage with minor gaps

Genesys Fax APIThe Fax API from Genesys — 5 operation(s) for fax.65.6 Phone Com Fax APIPhone.com customers can fax outbound documents via the Control Panel or API; They can also receive incoming...64.6 RingCentral Fax APIThe RingCentral Fax API enables developers to add programmable and customizable fax sending and receiving c...61.5 Emboss Fax APIThe Fax API from Emboss — 2 operation(s) for fax.60.3

Developing 2 Usable, with meaningful gaps to close

Dropbox Fax APIThe Fax API from Dropbox — 4 operation(s) for fax.47.9 noerrands-com Fax APIFaxing46.0

Thin 1 Limited public surface area

Documo Fax APISend, resend, retrieve, list, and download faxes.30.6

Companies reaching this through an API (6)

These companies publish an API, specification or operation carrying “Fax” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Dropbox Dropbox Sign (HelloSign) Genesys noerrands-com Phone Com Zoom Phone

Score breakdown

Frequency

39.5

log-scaled weighted occurrences

Breadth

0.2

spread across providers

Quality lift

38.4

mean composite of providers using it

Cohesion

2.6

strength of nearest seed neighbor

Where this tag comes from

Provider tag15

Api tag9

Openapi tag5

Openapi op tag26

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

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

https://apis.io/mcp

Tools for tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
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

This tag

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

All tags

curl "https://apis.io/api/v1/tags?limit=25"

As a scored cohort (paid plan)

The distribution (Pro)

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

Fax

Providers using this tag (15)

APIs with this tag (9)