Feature
Multiple Output Formats
JSON, XML, CSV, and other selectable representations.
24 providers
68 APIs
12 declared variants
The API can return more than one representation — commonly JSON plus XML, CSV, GeoJSON, or Parquet — via content negotiation or a format parameter. Saves integrators a transformation step.
24 API providers on the APIs.io network offer multiple output formats. The highest-rated are positionstack, LALAL.AI, Onfleet, Soracom, Workday Report Writer.
Providers
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Strong 4 Solid coverage with minor gaps
positionstackForward and Reverse Batch Geocoding REST API by positionstack (an apilayer product, owned by Idera, Inc.). ...LALAL.AILALAL.AI is an AI-powered audio separation and voice technology platform operated by OmniSale GmbH. It uses...OnfleetOnfleet is an AI-powered last-mile delivery management platform that orchestrates fleet operations, dispatc...SoracomSoracom is a global IoT cellular connectivity and platform provider headquartered in Tokyo, founded in 2014...
Developing 11 Usable, with meaningful gaps to close
Workday Report WriterAPIs for Workday Report Writer - a tool for creating custom reports and data extracts from Workday HCM and ...MockarooMockaroo is a realistic mock data generator and API mocking service used by developers and QA teams to prod...Amazon Kinesis Data FirehoseAmazon Kinesis Data Firehose is the easiest way to reliably load streaming data into data lakes, data store...Bright DataBright Data is an Israeli web data platform and operator of the world's largest legitimate residential prox...Holiday APIHoliday API is a commercial reference-data service that delivers verified public holidays, observances, cou...NominatimNominatim is an open-source (BSD-2-Clause) search engine for OpenStreetMap data, supporting forward geocodi...Radio BrowserRadio Browser is a free, community-driven directory of internet radio stations. The project publishes a pub...NOAA — National Oceanic and Atmospheric AdministrationThe National Oceanic and Atmospheric Administration (NOAA) is the United States scientific and regulatory a...FrankfurterFrankfurter is an open-source (MIT) currency exchange rates API that blends foreign-exchange reference rate...Wolfram|AlphaWolfram|Alpha is a computational knowledge engine that provides answers to natural language queries using a...Weather.govWeather.gov is the official website of the National Weather Service (NWS), operated by NOAA within the US D...
Thin 7 Limited public surface area
Agricultural Statistics ServiceThe National Agricultural Statistics Service (NASS) is an agency of the United States Department of Agricul...Apache HttpComponentsApache HttpComponents is a set of Java HTTP components, including a feature-rich HTTP client (HttpClient 5....AllianzAllianz is one of the world's largest insurance and financial services companies, serving over 86 million c...APIs.guruAPIs.guru is an open source, community-driven directory of public REST API definitions in OpenAPI 2.0/3.x f...Arrow ElectronicsArrow Electronics is a global provider of products, services, and solutions to industrial and commercial us...Random User GeneratorFree random user data API for generating realistic fake user profiles with names, addresses, photos, and co...CataasCataas (Cat as a Service) is a free, open-source REST API that returns random cat images and GIFs with opti...
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.
24-character URL-safe resource IDs; GeoJSON [longitude, latitude] coordinates; Unix-millisecond timestamps; E.164 phone numbersContent NegotiationDirect billing endpoints (/v1/bills) with daily and monthly granularity and CSV exportFormat ConversionGeoJSON, JSON-LD, CAP, ATOM, and DWML response formats via content negotiation on NWS APIJSON, NDJSON, CSV, XLSX, and Parquet output formatsMulti-Format OutputMulti-Format SupportMulti-format outputMultiple Output FormatsMultiple Response FormatsOutput formats MP3, WAV, FLAC, AAC, OGG (defaults to source format)
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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.