Feature
Filtering & Querying
Server-side filters, sorting, and field selection.
46 providers
91 APIs
42 declared variants
Queries can be narrowed with filters, sort orders, date ranges, and sparse fieldsets. Cuts payload size and the amount of client-side post-processing an integrator has to write.
46 API providers on the APIs.io network offer filtering & querying. The highest-rated are Close, Bugsnag, Commerce Layer, IPinfo, Buildkite.
Providers
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 4 Complete, well-documented, and agent-ready
CloseClose is an inside-sales CRM with calling, email, SMS, and WhatsApp built in. The Close API exposes leads, ...BugsnagBugSnag is an application stability monitoring platform from SmartBear that helps software teams detect, di...Commerce LayerCommerce Layer is the headless, multi-market commerce API used by global brands to sell everywhere — web, m...IPinfoIPinfo is an IP address data and intelligence platform that provides geolocation (country, region, city, co...
Strong 12 Solid coverage with minor gaps
BuildkiteBuildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with se...BarndoorBarndoor AI is the control plane for agentic AI, providing secure access and governance for AI agents and M...MediastackMediastack is a free and paid REST API by apilayer for live, historical, and blog news articles aggregated ...Adafruit IOAdafruit IO is a cloud Internet of Things platform from Adafruit Industries built for makers, hobbyists, st...Amazon EventBridge PipesAmazon EventBridge Pipes helps you create point-to-point integrations between event producers and consumers...SportmonksSportmonks is a Dutch sports data provider (Deventer, Netherlands) delivering developer-friendly REST APIs ...Amazon X-RayAWS X-Ray is a distributed tracing service that helps developers analyze and debug production applications,...Amazon CloudSearchAmazon CloudSearch is a managed search service that makes it easy to set up, manage, and scale a search sol...AdaptAdapt (adapt.io) is a B2B lead intelligence and sales acceleration platform that provides a database of 250...Amazon RedshiftAmazon Redshift is a fast, fully managed cloud data warehouse that makes it simple and cost-effective to an...Amazon SNSAmazon Simple Notification Service (SNS) is a fully managed messaging service for both application-to-appli...CalendarificWorldwide public holidays REST API covering 230+ countries. Calendarific provides national, local, religiou...
Developing 15 Usable, with meaningful gaps to close
arXivarXiv is the open-access e-print repository operated by Cornell Tech, hosting more than two million preprin...AWS RedshiftAmazon Redshift is a fast, fully managed, petabyte-scale data warehouse service that makes it simple and co...ChromaChroma (Chroma DB) is an open-source AI-native embedding database designed to make it easy to build LLM app...PhonelyPhonely is an AI voice agent platform that answers business phone calls in real time with large-language-mo...BlockdaemonBlockdaemon is an institutional blockchain infrastructure company founded in 2017 by Konstantin Richter. It...NominatimNominatim is an open-source (BSD-2-Clause) search engine for OpenStreetMap data, supporting forward geocodi...StackOneStackOne is an AI-powered embedded integration platform as a service (iPaaS) designed to simplify and accel...MeilisearchMeilisearch is an open source, lightning-fast search engine API that brings AI-powered hybrid search to sit...GutendexGutendex is a simple, self-hosted JSON-based web API for serving book catalog information from Project Gute...HumaansHumaans is a London-headquartered modern HRIS (Human Resources Information System) for fast-growing, distri...IEEE XploreIEEE Xplore is the authoritative technical library operated by the Institute of Electrical and Electronics ...Apache NutchApache Nutch is a highly extensible and scalable open-source web crawler software project built on Apache H...TypesenseTypesense is a fast, typo-tolerant, open-source search engine designed for developer productivity. It provi...Apache SolrApache Solr is an open-source enterprise search platform built on Apache Lucene. It provides distributed in...Punk APIPunk API is a free, no-auth REST API exposing BrewDog's "DIY Dog" open-source beer recipe collection — 325 ...
Thin 10 Limited public surface area
Youkiyouki is an open source container runtime written in Rust that implements the OCI runtime specification as ...TrinoTrino is an open-source, distributed SQL query engine built for lightning-fast analytics over large, hetero...Microsoft Entity FrameworkMicrosoft Entity Framework is an object-relational mapping (ORM) framework for .NET developers enabling dat...JSONPlaceholderJSONPlaceholder is a free, no-auth fake REST API for prototyping, tutorials, and testing. It exposes six re...KnitKnit is a unified API platform for B2B products, AI agents, and MCP clients, providing integrations infrast...Lex MachinaLex Machina is a legal analytics platform owned by LexisNexis that transforms raw court documents and docke...Bored APIThe Bored API is a free, open-source, no-authentication public API that serves suggestions for things to do...Ariba Guided BuyingSAP Ariba Guided Buying provides a consumer-like shopping experience for enterprise procurement, enabling e...Apache RocketMQApache RocketMQ is a distributed messaging and streaming platform with low latency, high performance, and r...Apache MahoutApache Mahout is an open-source framework for building scalable machine learning applications. The project ...
Emerging 5 Early or largely undocumented
Revel SystemsRevel Systems is a cloud iPad-based POS for restaurants and retailers. The Revel Open API exposes products,...Amazon Application Discovery ServiceAmazon Application Discovery Service helps enterprise customers plan application migration projects by auto...Bloomberg Query Language (BQL)Bloomberg Query Language (BQL) is a proprietary query language for accessing, filtering, aggregating, and c...Descartes LabsDescartes Labs was a Santa Fe, New Mexico geospatial intelligence company founded in 2014 as a spin-out fro...AlternativeToAlternativeTo is a crowdsourced software discovery platform that helps users find alternatives to software ...
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.
Account activities log with type filteringBatch retry API for failed jobs with optional state filteringCase Query API with filtering by participants, dates, events, resolutions, findings, remedies, and damagesCategory FilteringCollaborative FilteringConfigurable URL FilteringContent FilteringContext FilteringCountry And Layer FilteringDate-Range FilteringDynamic filteringEvent FilteringFaceted SearchFaceted search and filteringFederated QueryField FilteringField-Lookup FilteringFilters, Includes, Field SelectionGeosearch and faceted searchGlobal Query FiltersHoliday Type FilteringIncremental sync with updated_after filteringMessage FilteringMetadata FilteringMulti-dimensional filteringPlatform FilteringQuery FilteringRecipe-Oriented Query FiltersRich FilteringRich filtering operators ($in, $nin, $gt, $gte, $lt, $lte, $or) on most collectionsSeccomp FilteringSecurity Universe FilteringSensitive data filteringSpam filtering on inbound callsTag-based filtering and organization of discovered assetsTagging across resources; sparse fieldsets; filtering, sorting, pagination, and include parameters per JSON:APITechnographic filtering (technology stack) and exact-title matchingToken Pricing & Metadata API (Beta) with tag-based filteringTool FilteringTrace Filtering and Groups
Showing 40 of 42 declared variants
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.