Feature

JSON Responses

JSON as the primary request and response format.

11 providers 28 APIs 9 declared variants

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

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

Providers

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

Exemplar 1 Complete, well-documented, and agent-ready
Adobe LaunchAdobe Launch, now known as Adobe Experience Platform Tags, is a next-generation tag management system that ...7 APIs72.4
Developing 5 Usable, with meaningful gaps to close
Ally InvestAlly Invest is an online brokerage platform offering commission-free self-directed trading of US stocks, ET...1 API51.1WeatherAPIWeatherAPI.com provides real-time, forecast, historical, marine, future, astronomy, air quality, pollen, sp...1 API50.0Australia PostAustralia Post is Australia's primary postal operator, offering a developer platform with REST APIs for e-c...2 APIs46.5IEEE XploreIEEE Xplore is the authoritative technical library operated by the Institute of Electrical and Electronics ...1 API44.4Weather.govWeather.gov is the official website of the National Weather Service (NWS), operated by NOAA within the US D...1 API39.5
Thin 4 Limited public surface area
Apache CouchDBApache CouchDB is an open-source distributed document-oriented NoSQL database governed by the Apache Softwa...9 APIs39.1agcoAGCO is a global leader in the design, manufacture, and distribution of agricultural machinery and precisio...1 API36.4Numbers APINumbers API by David Hu and Mack Duan — a free, community-contributed HTTP API for interesting facts about ...1 API30.7U.S. Geological SurveyThe U.S. Geological Survey (USGS) is a scientific agency of the U.S. government that conducts research and ...1 API30.1
Emerging 1 Early or largely undocumented
Varnish CacheVarnish Cache is a high-performance HTTP accelerator and reverse proxy designed for content-heavy dynamic w...3 APIs20.7

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

Scroll for all 9

Work with this as data

Every feature here is available over the APIs.io API and to AI agents over MCP. Features is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.

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Tools for features

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.
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Call it yourself

curl for this page
Search the catalog 
curl "https://apis.io/api/v1/search?q=json-responses&limit=10"
Everything under a tag 
curl "https://apis.io/api/v1/tags/json-responses"

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