Feature

Rate Limiting

Documented request quotas and throttling behavior.

77 providers 716 APIs 70 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.

77 API providers on the APIs.io network offer rate limiting. The highest-rated are Datadog, Canvas LMS, Anthropic, Shopify, Knock.

Providers

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

Exemplar 4 Complete, well-documented, and agent-ready
Datadog Datadog is a monitoring and analytics platform that helps organizations gain insight into their infrastruct... 85 APIs 73.6 Canvas LMS Canvas is the open, AGPLv3-licensed learning management system created and maintained by Instructure, Inc. ... 7 APIs 73.4 Anthropic Anthropic is an AI safety company and creator of the Claude family of large language models (Opus, Sonnet, ... 11 APIs 72.6 Shopify Shopify is a complete commerce platform that lets you start, grow, and manage a business. The Shopify API l... 20 APIs 70.5
Strong 18 Solid coverage with minor gaps
Knock Knock is notifications infrastructure as a service — a product and customer messaging platform you use to p... 14 APIs 69.3 GitHub The GitHub REST API allows developers to programmatically interact with GitHub resources including reposito... 65 APIs 69.2 Assembled Assembled is a San Francisco-headquartered support operations platform that unifies workforce management (W... 12 APIs 69.1 Slack Slack is a cloud-based team collaboration platform that provides chat, file sharing, and integrations with ... 39 APIs 68.1 Buildkite Buildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with se... 5 APIs 67.8 Okta Okta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Iden... 3 APIs 66.6 Hunter Hunter.io is an email-intelligence and outbound platform that finds, verifies, and enriches professional em... 8 APIs 65.9 Sendcloud Sendcloud is Europe's leading shipping platform for e-commerce, headquartered in Eindhoven, Netherlands. Th... 20 APIs 65.0 Didomi Didomi is a Paris-based consent and preference management platform (CMP/PMP) that helps publishers, adverti... 6 APIs 64.7 reducto-ai Reducto is an AI document-parsing platform that turns unstructured PDFs, images, spreadsheets, slides, and ... 10 APIs 64.7 WSO2 WSO2 API Manager is an open-source API management platform supporting REST, SOAP, and GraphQL with flexible... 8 APIs 64.5 Amazon DataSync AWS DataSync is an online data transfer service that simplifies, automates, and accelerates moving data bet... 1 API 63.1 Help Scout Help Scout is an email-first help desk platform with shared inboxes, live chat, knowledge bases, and a cust... 17 APIs 62.3 Greenhouse Greenhouse Software is an enterprise applicant tracking system (ATS) and end-to-end hiring platform spannin... 8 APIs 61.8 TensorDock TensorDock operates a global GPU cloud marketplace that connects independent hardware hosts with customers ... 3 APIs 61.8 Tyk Tyk is an open-source API gateway and management platform supporting REST, GraphQL, gRPC, and Async APIs wi... 4 APIs 61.2 Holiday API Holiday API is a commercial reference-data service that delivers verified public holidays, observances, cou... 4 APIs 61.0 Discord Discord is a voice, video and text communication service used by hundreds of millions of people to hang out... 9 APIs 60.6
Developing 31 Usable, with meaningful gaps to close
ankr Ankr is a Web3 infrastructure provider whose multichain RPC, Advanced API, liquid staking, contract automat... 5 APIs 59.5 StackOne StackOne is an AI-powered embedded integration platform as a service (iPaaS) designed to simplify and accel... 12 APIs 59.4 WHOOP WHOOP is a wearable health and performance company whose wrist-worn strap (WHOOP 5.0 and medical-grade WHOO... 2 APIs 59.2 Fitbit Fitbit is a wearable health and fitness platform — devices (trackers, smartwatches, smart scales) plus a co... 12 APIs 58.5 Apache James Apache James (Java Apache Mail Enterprise Server) is a portable and enterprise-ready mail server built enti... 2 APIs 58.1 Typesense Typesense is a fast, typo-tolerant, open-source search engine designed for developer productivity. It provi... 5 APIs 57.3 Thoughtly Thoughtly is an AI voice and chat agent platform that helps revenue and support teams contact every lead ac... 1 API 56.9 Supabase Supabase is an open-source Firebase alternative that provides a suite of backend services built on top of P... 6 APIs 55.9 APIPark APIPark is an open-source, cloud-native AI gateway and API developer portal that helps developers and enter... 1 API 55.7 API Snap API Snap is a developer utility platform that consolidates 13+ commonly needed REST APIs into a single, uni... 13 APIs 55.5 Track-POD Track-POD is a cloud-based delivery management platform that combines route planning and optimization with ... 1 API 55.1 TrackingMore TrackingMore is a multi-carrier shipment tracking platform offering a unified REST API that integrates with... 1 API 55.0 Australia Post Australia Post is Australia's primary postal operator, offering a developer platform with REST APIs for e-c... 5 APIs 54.9 Hostaway Hostaway is an AI-powered vacation rental management platform that consolidates property management, channe... 10 APIs 54.4 Jobber Jobber is field service management software for home and commercial service businesses, serving 100,000+ bu... 1 API 54.3 Lunar.dev Lunar.dev is an enterprise-grade gateway platform for AI governance and third-party API consumption control... 2 APIs 53.5 VTEX VTEX is a global enterprise digital commerce platform that provides end-to-end solutions for businesses to ... 44 APIs 53.2 Hatchet Hatchet is an open-source distributed task queue and workflow orchestration engine for background jobs, AI ... 1 API 53.1 Unkey Unkey is the developer platform for modern APIs, providing globally distributed API key management, rate li... 1 API 51.7 Ambassador Ambassador is a Kubernetes-native API Gateway built on Envoy Proxy, providing routing, load balancing, auth... 6 APIs 51.1 Apache Dubbo Apache Dubbo is a high-performance, Java-based open-source RPC framework that provides service discovery, t... 3 APIs 50.9 Apollo.io Apollo.io is a sales intelligence and engagement platform combining a 270M+ contact database with email and... 22 APIs 50.8 Microsoft Azure Cloud A comprehensive collection of Microsoft Azure cloud service APIs covering compute, storage, databases, AI, ... 10 APIs 50.3 Close Close is an inside-sales CRM with calling, email, SMS, and WhatsApp built in. The Close API exposes leads, ... 28 APIs 49.3 Solo.io Solo.io provides enterprise infrastructure for cloud-native and AI-native environments, including API gatew... 4 APIs 49.3 mlsgrid The MLS Grid is a normalized, RESO-compliant data distribution platform that gives brokers, MLSs, and appli... 1 API 49.1 Front Front is a customer operations platform unifying shared inboxes, chat, SMS, social, and CRM workflows. Fron... 25 APIs 49.0 Knit Knit is a unified API platform for B2B products, AI agents, and MCP clients, providing integrations infrast... 1 API 48.5 Mapbox Mapbox is a leading mapping and location data platform that provides tools and services to help developers ... 10 APIs 46.5 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... 1 API 46.2 Test Rate Limit Check Testing and validation of API rate limiting implementations to ensure that APIs correctly enforce request q... 6 APIs 45.8
Thin 19 Limited public surface area
launchdarkly LaunchDarkly is a feature management platform that enables development teams to deliver and control softwar... 3 APIs 44.6 Whereby Whereby is an embeddable video API plus standalone meetings product that lets developers add browser-based,... 2 APIs 44.6 Punk API Punk API is a free, no-auth REST API exposing BrewDog's "DIY Dog" open-source beer recipe collection — 325 ... 1 API 43.7 Ravelin Ravelin is a London-based fraud detection and prevention platform offering AI-native, real-time decisioning... 4 APIs 43.5 RocketReach RocketReach is a Seattle-based B2B contact data and sales intelligence provider that maintains a database o... 5 APIs 43.4 NOAA — National Oceanic and Atmospheric Administration The National Oceanic and Atmospheric Administration (NOAA) is the United States scientific and regulatory a... 12 APIs 42.2 TheMealDB TheMealDB is a comprehensive online platform offering a vast collection of recipes from around the world wi... 1 API 41.8 JSONPlaceholder JSONPlaceholder is a free, no-auth fake REST API for prototyping, tutorials, and testing. It exposes six re... 1 API 41.6 freshworks Freshworks is a software company that develops cloud-based business software including customer support, IT... 8 APIs 40.9 LAPIS LAPIS (Lightweight API Specification for Intelligent Systems) is a compact, LLM-native API description form... 1 API 40.3 Cloudflare AI Gateway Cloudflare AI Gateway is a managed LLM proxy that sits in front of 23+ AI providers (OpenAI, Anthropic, Goo... 4 APIs 40.0 Healthie Healthie is a cloud, API-first EHR and practice management platform purpose-built for digital health startu... 1 API 38.7 Ron Swanson Quotes A community-built, open source HTTP API that returns Ron Swanson quotes from the NBC television series Park... 1 API 38.2 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 34.7 Blynk Blynk is a low-code / no-code IoT software platform that helps companies prototype, deploy, and remotely ma... 3 APIs 32.5 Krea Krea is a real-time AI creative suite that lets designers, filmmakers, brand teams, and everyday creators g... 8 APIs 32.2 Volvo Cars Volvo Cars is a Swedish premium automotive OEM (headquartered in Gothenburg, owned by Geely) that operates ... 4 APIs 32.2 Drip Drip is a Minneapolis-based ecommerce marketing automation platform that combines email, SMS, popups, and w... 2 APIs 30.9 Fusio Fusio is an open source API management platform which helps to build and manage REST APIs. It provides capa... 3 APIs 30.0
Emerging 5 Early or largely undocumented
Glama Glama is an all-in-one AI workspace combining an MCP server marketplace and registry, a managed MCP gateway... 7 APIs 29.5 Polar Polar Electro Oy (operating as Polar Global) is a Finnish sports and fitness technology company founded in ... 3 APIs 29.3 Raken Raken is a San Diego-based construction technology company providing a field-first daily reporting and fiel... 1 API 27.1 Certn Certn is a Canadian background screening platform headquartered in Victoria, British Columbia, providing fa... 4 APIs 26.9 AI Gateway An API Evangelist landscape index of AI gateways — the LLM routers, prompt firewalls, model fallback proxie... 15 APIs 26.7

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 70 declared variants