Feature
Rate Limiting
Documented request quotas and throttling behavior.
76 providers
518 APIs
68 declared variants
The API publishes request quotas, throttling rules, and rate-limit headers so clients can back off predictably. Undocumented limits are one of the most common causes of production incidents.
76 API providers on the APIs.io network offer rate limiting. The highest-rated are Messagebird, Shopify, Didomi, Close, Klaviyo.
Providers
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 16 Complete, well-documented, and agent-ready
MessagebirdMessageBird, which trades as Bird, is a Dutch cloud communications company whose platform carries email, SM...ShopifyShopify is a complete commerce platform that lets you start, grow, and manage a business, selling online, i...DidomiDidomi is a Paris-based consent and preference management platform (CMP/PMP) that helps publishers, adverti...CloseClose is an inside-sales CRM with calling, email, SMS, and WhatsApp built in. The Close API exposes leads, ...KlaviyoKlaviyo is a marketing automation and customer data platform built for ecommerce. Build custom integrations...LaunchDarklyLaunchDarkly is a feature management and runtime control platform. Development teams use it to wrap release...AnthropicAnthropic is an AI safety company and the creator of the Claude family of large language models (Opus, Sonn...GitHubThe GitHub REST API allows developers to programmatically interact with GitHub resources including reposito...Canvas LMSCanvas is the open, AGPLv3-licensed learning management system created and maintained by Instructure, Inc. ...AvailityAvaility is a healthcare information network and clearinghouse providing REST APIs for real-time HIPAA EDI ...KnockKnock is notifications infrastructure as a service — a product and customer messaging platform you use to p...SendcloudSendcloud is Europe's leading shipping platform for e-commerce, headquartered in Eindhoven, Netherlands. Th...HealthieHealthie is a cloud, API-first EHR and practice management platform purpose-built for digital health startu...WSO2WSO2 API Manager is an open-source API management platform supporting REST, SOAP, and GraphQL with flexible...DatadogDatadog is a monitoring and analytics platform that helps organizations gain insight into their infrastruct...DeelDeel is a global workforce platform combining payroll, Employer of Record (EOR), independent contractor man...
Strong 20 Solid coverage with minor gaps
SlackSlack is a cloud-based team collaboration platform that provides chat, file sharing, and integrations with ...FitbitFitbit is a wearable health and fitness platform — devices (trackers, smartwatches, smart scales) plus a co...BuildkiteBuildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with se...Apollo.ioApollo.io is a sales intelligence and go-to-market platform combining a database of 240M+ contacts and 30M+...MlsgridThe MLS Grid is a normalized, RESO-compliant data distribution platform that gives brokers, MLSs, and appli...AnkrAnkr is a Web3 infrastructure provider whose multichain RPC, Advanced API, liquid staking, contract automat...OktaOkta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Iden...Solo.ioSolo.io is a cloud-native application-networking company founded in 2017 that builds enterprise and open-so...WalmartWalmart is a multinational retail corporation that operates a chain of hypermarkets, discount department st...RocketReachRocketReach is a Seattle-based B2B contact data and sales intelligence provider that maintains a database o...AssembledAssembled is a San Francisco-headquartered support operations platform that unifies workforce management (W...WHOOPWHOOP is a fitness and recovery wearable platform providing a REST API for accessing sleep, recovery, strai...TykTyk is an open-source API gateway and management platform supporting REST, GraphQL, gRPC, and Async APIs wi...TensorDockTensorDock operates a global GPU cloud marketplace that connects independent hardware hosts with customers ...JobberJobber is field service management software for home and commercial service businesses, serving 100,000+ bu...Track-PODTrack-POD is a cloud-based delivery management platform that combines route planning and optimization with ...HatchetHatchet is an open-source distributed task queue and workflow orchestration engine for background jobs, AI ...FusioFusio is Apache-2.0, self-hosted API management from apioo (Christoph Kappestein, Germany). An operator ins...Amazon DataSyncAWS DataSync is an online data transfer service that simplifies, automates, and accelerates moving data bet...ThoughtlyThoughtly is an AI voice and chat agent platform that helps revenue and support teams contact every lead ac...
Developing 24 Usable, with meaningful gaps to close
Cloudflare AI GatewayCloudflare AI Gateway is a managed LLM proxy that sits in front of 23+ AI providers (OpenAI, Anthropic, Goo...GreenhouseGreenhouse Software is an enterprise applicant tracking system (ATS) and end-to-end hiring platform spannin...WherebyWhereby is an embeddable video API plus standalone meetings product that lets developers add browser-based,...LunarLunar is an enterprise-grade API management and AI control plane platform that provides a unified gateway f...Holiday APIHoliday API is a commercial reference-data service that delivers verified public holidays, observances, cou...HostawayHostaway is an AI-powered vacation rental management platform that consolidates property management, channe...API SnapAPI Snap is a developer utility platform that consolidates 13+ commonly needed REST APIs into a single, uni...VTEXVTEX is a global enterprise digital commerce platform that provides end-to-end solutions for businesses to ...FrontFront is a customer operations platform unifying shared inboxes, chat, SMS, social, and CRM workflows. Fron...StackOneStackOne is an AI-powered embedded integration platform as a service (iPaaS) designed to simplify and accel...Help ScoutHelp Scout is an email-first help desk platform with shared inboxes, live chat, knowledge bases, and a cust...TrackingMoreTrackingMore is a multi-carrier shipment tracking platform offering a unified REST API that integrates with...Australia PostAustralia Post is Australia's primary postal operator, offering a developer platform with REST APIs for e-c...DiscordDiscord is a voice, video and text communication service used by hundreds of millions of people to hang out...Apache DubboApache Dubbo is a high-performance, Java-based open-source RPC framework that provides service discovery, t...NOAA — National Oceanic and Atmospheric AdministrationThe National Oceanic and Atmospheric Administration (NOAA) is the United States scientific and regulatory a...UnkeyUnkey is the developer platform for modern APIs, providing globally distributed API key management, rate li...FreshworksFreshworks is a software company that develops cloud-based business software including customer support, IT...PolarPolar Electro Oy (operating as Polar Global) is a Finnish sports and fitness technology company founded in ...SupabaseSupabase is an open-source Firebase alternative that provides a suite of backend services built on top of P...TypesenseTypesense is a fast, typo-tolerant, open-source search engine designed for developer productivity. It provi...MapboxMapbox is a leading mapping and location data platform that provides tools and services to help developers ...Punk APIPunk API is a free, no-auth REST API exposing BrewDog's "DIY Dog" open-source beer recipe collection — 325 ...Kong AI GatewayKong AI Gateway is the AI-native capability layer built on top of Kong Gateway and managed through Kong Kon...
Thin 13 Limited public surface area
KreaKrea is a real-time AI creative suite that lets designers, filmmakers, brand teams, and everyday creators g...AI GatewayAn API Evangelist landscape index of AI gateways — the LLM routers, prompt firewalls, model fallback proxie...Apache JamesApache James (Java Apache Mail Enterprise Server) is a portable and enterprise-ready mail server built enti...RavelinRavelin is a London-based fraud detection and prevention platform offering AI-native, real-time decisioning...AmbassadorAmbassador is a Kubernetes-native API Gateway built on Envoy Proxy, providing routing, load balancing, auth...Ron Swanson QuotesA community-built, open source HTTP API that returns Ron Swanson quotes from the NBC television series Park...JSONPlaceholderJSONPlaceholder is a free, no-auth fake REST API for prototyping, tutorials, and testing. It exposes six re...LAPISLAPIS (Lightweight API Specification for Intelligent Systems) is a compact, LLM-native API description form...APIParkAPIPark is an open-source, cloud-native AI gateway and API developer portal that helps developers and enter...KnitKnit is a unified API platform for B2B products, AI agents, and MCP clients, providing integrations infrast...GlamaGlama is an all-in-one AI workspace combining an MCP server marketplace and registry, a managed MCP gateway...Volvo CarsVolvo Cars is a Swedish premium automotive OEM (headquartered in Gothenburg, owned by Geely) that operates ...BlynkBlynk is a low-code / no-code IoT software platform that helps companies prototype, deploy, and remotely ma...
Emerging 2 Early or largely undocumented
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.
100 requests per minute API rate limit; subscriber 429s retried once with Retry-After100 requests per minute per organization on the v2 API202 per-operation rate limits published, token-bucket, allotted per seller; headers x-current-token-count + X-Next-Replenishment-TimeAdvanced ThrottlingAuth signup rate limits: 30/hr Free, 150/hr ProBandwidth ThrottlingBuilt-in rate limiting and retry logicCatalog/Search/Order Management with own rate limitsConfigurable per-key rate limitsDefault 150 requests-per-hour-per-user quota; 429 + Retry-After on overageDefault rate limit of 300 requests per minute (5 req/s) with bursts up to 20Default rate limits 600 req/min on most endpointsDocumented rate limits (2 RPS, 7,200/hour, 40,000/24h, 4 GB/hour) with HTTP 429 on violationDocumented rate limits — 15 req/10s per IP and 20 req/10s per accountDynamic rate limiting on AccessLink based on registered user count (15-minute and 24-hour windows)Enterprise plan: custom pricing and custom rate limitsFirst-Class Rate LimitsLeaky-Bucket Query Cost ThrottlingNCEI CDO v2 — token-based legacy climate API with 5 req/sec, 10k req/day rate limitsNo Rate LimitsNo Rate Limits DocumentedNo Velocity ThrottlingNo rate limits under 1B tokens/day; higher quotas negotiable within 48 hoursOnboarding GraphQL API with query-complexity rate limitingPer-Consumer Rate LimitingPer-Customer Rate LimitingPer-endpoint REST API rate limits with X-RateLimit-* headersPer-endpoint-group rate limits; org limits 3x individual key limitsPer-method tiered rate limits (Tier 1-4)Per-route bucket-based rate limits with X-RateLimit-Bucket headersPer-route rate limits + global 200 req/10sPer-token, per-endpoint rate limits (60-1,250 req/min defaults)Per-user API rate limits with org-wide capsPer-user-per-host throttling with X-Request-Cost and X-Rate-Limit-Remaining response headersPlan-tiered rate limits with job-backlog queueing instead of hard rejectionPoint-based rate limiting (100/min Build, 1000/min Enterprise)Predictable Rate Limit HeadersPublic Plan free with anonymous IP-scoped throttling — production should use PremiumQuery complexity scoring (max 2000) and 25-level depth limit instead of fixed RPS rate limitsQuota Management
Showing 40 of 68 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.