Feature

JSON Responses

JSON as the primary request and response format.

12 providers 101 APIs 9 declared variants

Requests and responses are JSON, the format every HTTP client and language runtime handles natively. Baseline expectation for modern integrations.

12 API providers on the APIs.io network offer json responses. The highest-rated are WeatherAPI, Adobe Launch, Australia Post, Ally Invest, Abstract API.

Providers

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

Strong 3 Solid coverage with minor gaps
WeatherAPI WeatherAPI.com provides real-time, forecast, historical, marine, future, astronomy, air quality, pollen, sp... 7 APIs 62.3 Adobe Launch Adobe Launch, now known as Adobe Experience Platform Tags, is a next-generation tag management system that ... 16 APIs 61.2 Australia Post Australia Post is Australia's primary postal operator, offering a developer platform with REST APIs for e-c... 4 APIs 56.1
Developing 6 Usable, with meaningful gaps to close
Ally Invest Ally Invest is an online brokerage platform offering commission-free self-directed trading of US stocks, ET... 11 APIs 55.4 Abstract API Abstract API is a platform that offers a wide range of API services for developers to easily integrate vari... 14 APIs 54.0 Weather.gov Weather.gov is the official website of the National Weather Service (NWS), operated by NOAA within the US D... 13 APIs 48.6 agco AGCO is a global leader in the design, manufacture, and distribution of agricultural machinery and precisio... 3 APIs 48.3 Apache CouchDB Apache CouchDB is an open-source distributed document-oriented NoSQL database governed by the Apache Softwa... 9 APIs 47.7 IEEE Xplore IEEE Xplore is the authoritative technical library operated by the Institute of Electrical and Electronics ... 5 APIs 45.6
Thin 2 Limited public surface area
Numbers API Numbers API by David Hu and Mack Duan — a free, community-contributed HTTP API for interesting facts about ... 5 APIs 36.6 U.S. Geological Survey The U.S. Geological Survey (USGS) is a scientific agency of the U.S. government that conducts research and ... 11 APIs 36.1
Emerging 1 Early or largely undocumented
Varnish Cache Varnish Cache is a high-performance HTTP accelerator and reverse proxy designed for content-heavy dynamic w... 3 APIs 23.4

What Providers Actually Declared

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

GeoJSON OutputGeoJSON ResponsesJSON API ProfilesJSON API specification-based programmatic managementJSON OutputJSON ResponsesJSON and XML ResponsesRESTful APIs using JSON payloads; GET, POST, PUT, PATCH, and DELETE methods supportedRESTful HTTP/JSON API

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