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

Cloudflare WAF APIThe Cloudflare Web Application Firewall API checks incoming web and API requests and filters undesired traf...80.6 IBM Cloud Internet ServicesProvide DDoS protection, global load balancing, DNS management, WAF, and CDN capabilities for internet-faci...69.1

Strong 3 Solid coverage with minor gaps

Azure Application Gateway APIWeb traffic load balancer with application-level routing and SSL termination.62.6 Azure Front Door APIGlobal load balancer and application delivery network that provides fast, reliable, and secure access to we...62.6 Azure Web Application Firewall APICloud-native web application firewall service that provides centralized protection for web applications fro...62.6

Developing 1 Usable, with meaningful gaps to close

CloudGuard WAF APICloudGuard WAF (formerly CloudGuard AppSec) protects web applications and APIs with contextual machine-lear...51.9

Thin 1 Limited public surface area

F5 Distributed Cloud Services APIComprehensive REST API for managing F5 Distributed Cloud Services including load balancers, WAF/WAAP polici...28.1

Minimal 1 Almost no public developer surface

Signal Sciences Core APIThe Signal Sciences Core API (now the Fastly Next-Gen WAF control-plane API) is a REST API served at https:...10.9

Companies reaching this through an API (4)

These companies publish an API, specification or operation carrying “Web Application Firewall” 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.

Azure Networking Services Cloudflare CloudGuard IBM

Score breakdown

Frequency

36.4

log-scaled weighted occurrences

Breadth

0.3

spread across providers

Quality lift

35.0

mean composite of providers using it

Cohesion

2.2

strength of nearest seed neighbor

Where this tag comes from

Provider tag13

Api tag9

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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

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This tag

curl "https://apis.io/api/v1/tags/web-application-firewall"

All tags

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

As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/web-application-firewall"

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/web-application-firewall/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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Web Application Firewall

Providers using this tag (13)

APIs with this tag (8)