Feature

Filtering & Querying

Server-side filters, sorting, and field selection.

45 providers 95 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.

45 API providers on the APIs.io network offer filtering & querying. The highest-rated are Bugsnag, Close, Buildkite, Commerce Layer, IPinfo.

Providers

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

Exemplar 3 Complete, well-documented, and agent-ready
BugsnagBugSnag is an application stability monitoring platform from SmartBear that helps software teams detect, di...5 published contracts78.4CloseClose is an inside-sales CRM with calling, email, SMS, and WhatsApp built in. The Close API exposes leads, ...4 published contracts75.8BuildkiteBuildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with se...2 published contracts72.1
Strong 13 Solid coverage with minor gaps
Commerce LayerCommerce Layer is the headless, multi-market commerce API used by global brands to sell everywhere — web, m...4 published contracts65.6IPinfoIPinfo is an IP address data and intelligence platform that provides geolocation (country, region, city, co...1 published contract64.6BarndoorBarndoor AI is the control plane for agentic AI, providing secure access and governance for AI agents and M...1 published contract62.0Amazon EventBridge PipesAmazon EventBridge Pipes helps you create point-to-point integrations between event producers and consumers...1 published contract61.7Amazon X-RayAWS X-Ray is a distributed tracing service that helps developers analyze and debug production applications,...2 published contracts61.1Adafruit IOAdafruit IO is a cloud Internet of Things platform from Adafruit Industries built for makers, hobbyists, st...2 published contracts60.4MediastackMediastack is a free and paid REST API by apilayer for live, historical, and blog news articles aggregated ...1 published contract59.7Amazon RedshiftAmazon Redshift is a fast, fully managed cloud data warehouse that makes it simple and cost-effective to an...2 published contracts58.8Amazon SNSAmazon Simple Notification Service (SNS) is a fully managed messaging service for both application-to-appli...1 published contract58.5SportmonksSportmonks is a Dutch sports data provider (Deventer, Netherlands) delivering developer-friendly REST APIs ...1 published contract58.5Amazon CloudSearchAmazon CloudSearch is a managed search service that makes it easy to set up, manage, and scale a search sol...1 published contract58.3AdaptAdapt (adapt.io) is a B2B lead intelligence and sales acceleration platform that provides a database of 250...1 published contract56.4CalendarificWorldwide public holidays REST API covering 230+ countries. Calendarific provides national, local, religiou...1 published contract54.8
Developing 13 Usable, with meaningful gaps to close
ChromaChroma (Chroma DB) is an open-source AI-native embedding database designed to make it easy to build LLM app...2 published contracts48.7arXivarXiv is the open-access e-print repository operated by Cornell Tech, hosting more than two million preprin...2 published contracts48.1StackOneStackOne is an AI-powered embedded integration platform as a service (iPaaS) designed to simplify and accel...1 published contract46.6HumaansHumaans is a London-headquartered modern HRIS (Human Resources Information System) for fast-growing, distri...1 published contract46.0PhonelyPhonely is an AI voice agent platform that answers business phone calls in real time with large-language-mo...2 APIs45.5BlockdaemonBlockdaemon is an institutional blockchain infrastructure company founded in 2017 by Konstantin Richter. It...11 APIs44.8NominatimNominatim is an open-source (BSD-2-Clause) search engine for OpenStreetMap data, supporting forward geocodi...1 published contract44.8MeilisearchMeilisearch is an open source, lightning-fast search engine API that brings AI-powered hybrid search to sit...1 published contract44.0Apache NutchApache Nutch is a highly extensible and scalable open-source web crawler software project built on Apache H...1 published contract42.8Apache SolrApache Solr is an open-source enterprise search platform built on Apache Lucene. It provides distributed in...1 published contract41.6IEEE XploreIEEE Xplore is the authoritative technical library operated by the Institute of Electrical and Electronics ...1 published contract41.4GutendexGutendex is a simple, self-hosted JSON-based web API for serving book catalog information from Project Gute...1 published contract41.0TypesenseTypesense is a fast, typo-tolerant, open-source search engine designed for developer productivity. It provi...2 published contracts40.3
Thin 11 Limited public surface area
Punk APIPunk API is a free, no-auth REST API exposing BrewDog's "DIY Dog" open-source beer recipe collection — 325 ...1 published contract37.0Youkiyouki is an open source container runtime written in Rust that implements the OCI runtime specification as ...2 APIs36.8Microsoft Entity FrameworkMicrosoft Entity Framework is an object-relational mapping (ORM) framework for .NET developers enabling dat...2 APIs36.1TrinoTrino is an open-source, distributed SQL query engine built for lightning-fast analytics over large, hetero...1 published contract35.6Ariba Guided BuyingSAP Ariba Guided Buying provides a consumer-like shopping experience for enterprise procurement, enabling e...2 APIs34.1KnitKnit is a unified API platform for B2B products, AI agents, and MCP clients, providing integrations infrast...1 published contract31.7JSONPlaceholderJSONPlaceholder is a free, no-auth fake REST API for prototyping, tutorials, and testing. It exposes six re...1 published contract31.3Lex MachinaLex Machina is a legal analytics platform owned by LexisNexis that transforms raw court documents and docke...2 published contracts29.9Bored APIThe Bored API is a free, open-source, no-authentication public API that serves suggestions for things to do...2 published contracts28.5Apache MahoutApache Mahout is an open-source framework for building scalable machine learning applications. The project ...2 APIs27.9Apache RocketMQApache RocketMQ is a distributed messaging and streaming platform with low latency, high performance, and r...1 published contract27.0
Emerging 3 Early or largely undocumented
Revel SystemsRevel Systems is a cloud iPad-based POS for restaurants and retailers. The Revel Open API exposes products,...7 APIs22.0Amazon Application Discovery ServiceAmazon Application Discovery Service helps enterprise customers plan application migration projects by auto...6 APIs21.4Bloomberg Query Language (BQL)Bloomberg Query Language (BQL) is a proprietary query language for accessing, filtering, aggregating, and c...2 APIs18.6
Minimal 2 Almost no public developer surface
AlternativeToAlternativeTo is a crowdsourced software discovery platform that helps users find alternatives to software ...10.5Descartes LabsDescartes Labs was a Santa Fe, New Mexico geospatial intelligence company founded in 2014 as a spin-out fro...6 APIs0.0

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.

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.
All 92 tools →

Call it yourself

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curl "https://apis.io/api/v1/tags/filtering-and-query"

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