Use Case

API Discovery & Cataloging

Finding and inventorying the APIs you already have.

11 providers 130 APIs 6 declared variants

Building a picture of every API in an estate or market — inventory and catalogs, indexing specs, classification, and the discovery surfaces humans and agents search.

11 API providers on the APIs.io network offer api discovery & cataloging. The highest-rated are APIs.io, Postman, APIPark, Akamai API Security, APIs.guru.

Providers

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 2 Complete, well-documented, and agent-ready
APIs.io APIs.io is an open-source API search engine and federated discovery network built on the APIs.json specific... 11 APIs 81.8 Postman Postman is the world's leading API platform, used by 35+ million developers to design, build, test, documen... 39 APIs 75.8
Developing 3 Usable, with meaningful gaps to close
APIPark APIPark is an open-source, cloud-native AI gateway and API developer portal that helps developers and enter... 4 APIs 52.9 Akamai API Security Akamai API Security (formerly Noname Security) provides comprehensive API discovery, posture management, an... 65 APIs 51.4 APIs.guru APIs.guru is an open source, community-driven directory of public REST API definitions in OpenAPI 2.0/3.x f... 1 API 49.4
Thin 3 Limited public surface area
APIClarity APIClarity is an open source API security and observability tool that analyzes API traffic to reconstruct O... 4 APIs 36.6 APIs.json APIs.json is an open, machine-readable specification that API providers can use to describe their API opera... 1 API 36.6 Apinity.io Apinity empowers organisations to run their compliant API marketplace that simplifies integration, drives a... 1 API 32.2
Emerging 3 Early or largely undocumented
Akita Software Akita Software was an API observability and analysis platform that used passive traffic monitoring to autom... 2 APIs 20.8 API Harmony API Harmony was an API discovery and recommendation tool from IBM Research that used graph-based search, ma... 1 API 19.7 Apivault Apivault is an open-source directory and gateway for discovering public APIs. The platform catalogs thousan... 1 API 17.9

What Providers Actually Declared

This use case is a canonical term. These are the free-text strings providers wrote in their own apis.yml that map onto it.

API DiscoveryAPI Discovery and CatalogCloud API DiscoveryInternal API CatalogInternal API MarketplaceShadow API Discovery

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