Feature

Rate Limiting

Documented request quotas and throttling behavior.

80 providers 2291 APIs 71 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.

80 API providers on the APIs.io network offer rate limiting. The highest-rated are Solo.io, Anthropic, Knock, Okta, Buildkite.

Providers

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

Exemplar 14 Complete, well-documented, and agent-ready
Solo.io Solo.io is a cloud-native application-networking company founded in 2017 that builds enterprise and open-so... 15 APIs 81.9 Anthropic Anthropic is an AI safety company and creator of the Claude family of large language models (Opus, Sonnet, ... 24 APIs 75.0 Knock Knock is notifications infrastructure as a service — a product and customer messaging platform you use to p... 35 APIs 72.2 Okta Okta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Iden... 28 APIs 72.0 Buildkite Buildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with se... 23 APIs 71.8 Canvas LMS Canvas is the open, AGPLv3-licensed learning management system created and maintained by Instructure, Inc. ... 16 APIs 71.7 GitHub The GitHub REST API allows developers to programmatically interact with GitHub resources including reposito... 350 APIs 71.3 Slack Slack is a cloud-based team collaboration platform that provides chat, file sharing, and integrations with ... 115 APIs 70.6 Datadog Datadog is a monitoring and analytics platform that helps organizations gain insight into their infrastruct... 290 APIs 69.9 Assembled Assembled is a San Francisco-headquartered support operations platform that unifies workforce management (W... 27 APIs 68.4 reducto-ai Reducto is an AI document-parsing platform that turns unstructured PDFs, images, spreadsheets, slides, and ... 10 APIs 67.1 Sendcloud Sendcloud is Europe's leading shipping platform for e-commerce, headquartered in Eindhoven, Netherlands. Th... 24 APIs 67.0 Didomi Didomi is a Paris-based consent and preference management platform (CMP/PMP) that helps publishers, adverti... 37 APIs 66.6 Amazon DataSync AWS DataSync is an online data transfer service that simplifies, automates, and accelerates moving data bet... 6 APIs 66.4
Strong 23 Solid coverage with minor gaps
Hunter Hunter.io is an email-intelligence and outbound platform that finds, verifies, and enriches professional em... 8 APIs 65.7 Shopify Shopify is a complete commerce platform that lets you start, grow, and manage a business. The Shopify API l... 213 APIs 64.8 ankr Ankr is a Web3 infrastructure provider whose multichain RPC, Advanced API, liquid staking, contract automat... 9 APIs 64.5 Tyk Tyk is an open-source API gateway and management platform supporting REST, GraphQL, gRPC, and Async APIs wi... 39 APIs 63.1 Fitbit Fitbit is a wearable health and fitness platform — devices (trackers, smartwatches, smart scales) plus a co... 3 APIs 62.6 WSO2 WSO2 API Manager is an open-source API management platform supporting REST, SOAP, and GraphQL with flexible... 90 APIs 62.6 Greenhouse Greenhouse Software is an enterprise applicant tracking system (ATS) and end-to-end hiring platform spannin... 27 APIs 62.1 Help Scout Help Scout is an email-first help desk platform with shared inboxes, live chat, knowledge bases, and a cust... 25 APIs 62.0 Discord Discord is a voice, video and text communication service used by hundreds of millions of people to hang out... 29 APIs 61.5 TensorDock TensorDock operates a global GPU cloud marketplace that connects independent hardware hosts with customers ... 9 APIs 61.5 Deel Deel is a global workforce platform combining payroll, Employer of Record (EOR), independent contractor man... 39 APIs 61.3 WHOOP WHOOP is a wearable health and performance company whose wrist-worn strap (WHOOP 5.0 and medical-grade WHOO... 7 APIs 61.0 StackOne StackOne is an AI-powered embedded integration platform as a service (iPaaS) designed to simplify and accel... 33 APIs 60.4 Holiday API Holiday API is a commercial reference-data service that delivers verified public holidays, observances, cou... 4 APIs 59.1 Track-POD Track-POD is a cloud-based delivery management platform that combines route planning and optimization with ... 8 APIs 58.6 Thoughtly Thoughtly is an AI voice and chat agent platform that helps revenue and support teams contact every lead ac... 4 APIs 58.4 API Snap API Snap is a developer utility platform that consolidates 13+ commonly needed REST APIs into a single, uni... 5 APIs 57.7 Unkey Unkey is the developer platform for modern APIs, providing globally distributed API key management, rate li... 8 APIs 57.6 Lunar Lunar is an enterprise-grade API management and AI control plane platform that provides a unified gateway f... 8 APIs 57.0 Lunar.dev Lunar.dev is an enterprise-grade gateway platform for AI governance and third-party API consumption control... 5 APIs 57.0 Typesense Typesense is a fast, typo-tolerant, open-source search engine designed for developer productivity. It provi... 25 APIs 56.7 Hatchet Hatchet is an open-source distributed task queue and workflow orchestration engine for background jobs, AI ... 27 APIs 56.5 Australia Post Australia Post is Australia's primary postal operator, offering a developer platform with REST APIs for e-c... 4 APIs 56.1
Developing 26 Usable, with meaningful gaps to close
Jobber Jobber is field service management software for home and commercial service businesses, serving 100,000+ bu... 1 API 55.9 Microsoft Azure Cloud A comprehensive collection of Microsoft Azure cloud service APIs covering compute, storage, databases, AI, ... 13 APIs 55.9 Supabase Supabase is an open-source Firebase alternative that provides a suite of backend services built on top of P... 21 APIs 55.8 mlsgrid The MLS Grid is a normalized, RESO-compliant data distribution platform that gives brokers, MLSs, and appli... 7 APIs 55.4 Apache James Apache James (Java Apache Mail Enterprise Server) is a portable and enterprise-ready mail server built enti... 9 APIs 54.7 Hostaway Hostaway is an AI-powered vacation rental management platform that consolidates property management, channe... 16 APIs 54.6 Cloudflare AI Gateway Cloudflare AI Gateway is a managed LLM proxy that sits in front of 23+ AI providers (OpenAI, Anthropic, Goo... 7 APIs 54.5 Ambassador Ambassador is a Kubernetes-native API Gateway built on Envoy Proxy, providing routing, load balancing, auth... 11 APIs 54.2 Apollo.io Apollo.io is a sales intelligence and engagement platform combining a 270M+ contact database with email and... 35 APIs 53.3 APIPark APIPark is an open-source, cloud-native AI gateway and API developer portal that helps developers and enter... 4 APIs 52.9 Front Front is a customer operations platform unifying shared inboxes, chat, SMS, social, and CRM workflows. Fron... 39 APIs 52.2 TrackingMore TrackingMore is a multi-carrier shipment tracking platform offering a unified REST API that integrates with... 3 APIs 52.2 Whereby Whereby is an embeddable video API plus standalone meetings product that lets developers add browser-based,... 8 APIs 51.8 Mapbox Mapbox is a leading mapping and location data platform that provides tools and services to help developers ... 12 APIs 50.2 Knit Knit is a unified API platform for B2B products, AI agents, and MCP clients, providing integrations infrast... 7 APIs 49.5 Close Close is an inside-sales CRM with calling, email, SMS, and WhatsApp built in. The Close API exposes leads, ... 62 APIs 49.3 VTEX VTEX is a global enterprise digital commerce platform that provides end-to-end solutions for businesses to ... 142 APIs 49.3 Apache Dubbo Apache Dubbo is a high-performance, Java-based open-source RPC framework that provides service discovery, t... 16 APIs 47.2 Test Rate Limit Check Testing and validation of API rate limiting implementations to ensure that APIs correctly enforce request q... 9 APIs 46.7 Punk API Punk API is a free, no-auth REST API exposing BrewDog's "DIY Dog" open-source beer recipe collection — 325 ... 1 API 46.2 Ravelin Ravelin is a London-based fraud detection and prevention platform offering AI-native, real-time decisioning... 13 APIs 45.9 freshworks Freshworks is a software company that develops cloud-based business software including customer support, IT... 44 APIs 44.4 launchdarkly LaunchDarkly is a feature management platform that enables development teams to deliver and control softwar... 27 APIs 44.0 Solo.io Solo.io provides enterprise infrastructure for cloud-native and AI-native environments, including API gatew... 4 APIs 43.8 RocketReach RocketReach is a Seattle-based B2B contact data and sales intelligence provider that maintains a database o... 3 APIs 43.4 NOAA — National Oceanic and Atmospheric Administration The National Oceanic and Atmospheric Administration (NOAA) is the United States scientific and regulatory a... 24 APIs 43.1
Thin 13 Limited public surface area
Ron Swanson Quotes A community-built, open source HTTP API that returns Ron Swanson quotes from the NBC television series Park... 1 API 40.6 JSONPlaceholder JSONPlaceholder is a free, no-auth fake REST API for prototyping, tutorials, and testing. It exposes six re... 6 APIs 39.6 Krea Krea is a real-time AI creative suite that lets designers, filmmakers, brand teams, and everyday creators g... 7 APIs 38.3 Healthie Healthie is a cloud, API-first EHR and practice management platform purpose-built for digital health startu... 1 API 37.9 Polar Polar Electro Oy (operating as Polar Global) is a Finnish sports and fitness technology company founded in ... 19 APIs 37.6 LAPIS LAPIS (Lightweight API Specification for Intelligent Systems) is a compact, LLM-native API description form... 1 API 35.3 Agify.io Agify.io is a simple REST API that predicts the age of a person based on their first name. Using a large da... 2 APIs 35.1 AI Gateway An API Evangelist landscape index of AI gateways — the LLM routers, prompt firewalls, model fallback proxie... 38 APIs 34.8 TheMealDB TheMealDB is a comprehensive online platform offering a vast collection of recipes from around the world wi... 4 APIs 33.1 Kong AI Gateway Kong AI Gateway is the AI-native capability layer built on top of Kong Gateway and managed through Kong Kon... 21 APIs 32.5 Blynk Blynk is a low-code / no-code IoT software platform that helps companies prototype, deploy, and remotely ma... 3 APIs 29.8 Volvo Cars Volvo Cars is a Swedish premium automotive OEM (headquartered in Gothenburg, owned by Geely) that operates ... 4 APIs 28.6 Drip Drip is a Minneapolis-based ecommerce marketing automation platform that combines email, SMS, popups, and w... 2 APIs 28.4
Emerging 4 Early or largely undocumented
Fusio Fusio is an open source API management platform which helps to build and manage REST APIs. It provides capa... 3 APIs 27.7 Glama Glama is an all-in-one AI workspace combining an MCP server marketplace and registry, a managed MCP gateway... 7 APIs 27.2 Raken Raken is a San Diego-based construction technology company providing a field-first daily reporting and fiel... 1 API 24.7 Certn Certn is a Canadian background screening platform headquartered in Victoria, British Columbia, providing fa... 4 APIs 24.6

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 APIAdvanced 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 LimitsFree public meal recipe API. Patreon supporters get premium API key with no rate limits.Leaky-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-minute and per-hour API rate limits scaled by plan tierPer-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 limits

Showing 40 of 71 declared variants