Feature

Rate Limiting

Documented request quotas and throttling behavior.

70 providers 407 APIs 63 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.

70 API providers on the APIs.io network offer rate limiting. The highest-rated are Anthropic, LaunchDarkly, Shopify, WSO2, GitHub.

Providers

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

Exemplar 14 Complete, well-documented, and agent-ready
AnthropicAnthropic is an AI safety company and the creator of the Claude family of large language models (Opus, Sonn...5 published contracts89.0LaunchDarklyLaunchDarkly is a feature management and runtime control platform. Development teams use it to wrap release...4 published contracts84.8ShopifyShopify is a complete commerce platform that lets you start, grow, and manage a business, selling online, i...3 published contracts84.6WSO2WSO2 API Manager is an open-source API management platform supporting REST, SOAP, and GraphQL with flexible...7 published contracts84.4GitHubThe GitHub REST API allows developers to programmatically interact with GitHub resources including reposito...39 published contracts81.8OktaOkta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Iden...2 published contracts80.2DidomiDidomi is a Paris-based consent and preference management platform (CMP/PMP) that helps publishers, adverti...1 published contract80.0DatadogDatadog is a monitoring and analytics platform that helps organizations gain insight into their infrastruct...6 published contracts79.2CloseClose is an inside-sales CRM with calling, email, SMS, and WhatsApp built in. The Close API exposes leads, ...2 published contracts75.3KlaviyoKlaviyo is a marketing automation and customer data platform built for ecommerce. Build custom integrations...1 published contract73.6SlackSlack is a cloud-based team collaboration platform that provides chat, file sharing, and integrations with ...32 published contracts73.2BuildkiteBuildkite is a hybrid CI/CD platform that combines a hosted control plane (pipelines.buildkite.com) with se...2 published contracts72.8SendcloudSendcloud is Europe's leading shipping platform for e-commerce, headquartered in Eindhoven, Netherlands. Th...20 published contracts68.3HealthieHealthie is a cloud, API-first EHR and practice management platform purpose-built for digital health startu...1 API67.6
Strong 19 Solid coverage with minor gaps
AvailityAvaility is a healthcare information network and clearinghouse providing REST APIs for real-time HIPAA EDI ...14 published contracts65.8RocketReachRocketReach is a Seattle-based B2B contact data and sales intelligence provider that maintains a database o...5 published contracts64.3Apollo.ioApollo.io is a sales intelligence and go-to-market platform combining a database of 240M+ contacts and 30M+...5 published contracts63.6WalmartWalmart is a multinational retail corporation that operates a chain of hypermarkets, discount department st...27 published contracts63.1MlsgridThe MLS Grid is a normalized, RESO-compliant data distribution platform that gives brokers, MLSs, and appli...1 published contract63.0DeelDeel is a global workforce platform combining payroll, Employer of Record (EOR), independent contractor man...9 published contracts62.9Amazon DataSyncAWS DataSync is an online data transfer service that simplifies, automates, and accelerates moving data bet...1 published contract62.8Australia PostAustralia Post is Australia's primary postal operator, offering a developer platform with REST APIs for e-c...12 published contracts61.7AnkrAnkr is a Web3 infrastructure provider whose multichain RPC, Advanced API, liquid staking, contract automat...4 published contracts60.3Solo.ioSolo.io is a cloud-native application-networking company founded in 2017 that builds enterprise and open-so...5 published contracts60.2KnockKnock is notifications infrastructure as a service — a product and customer messaging platform you use to p...2 published contracts59.7TykTyk is an open-source API gateway and management platform supporting REST, GraphQL, gRPC, and Async APIs wi...4 published contracts59.6FusioFusio is Apache-2.0, self-hosted API management from apioo (Christoph Kappestein, Germany). An operator ins...4 published contracts59.4HatchetHatchet is an open-source distributed task queue and workflow orchestration engine for background jobs, AI ...1 published contract57.9AssembledAssembled is a San Francisco-headquartered support operations platform that unifies workforce management (W...4 published contracts56.4JobberJobber is field service management software for home and commercial service businesses, serving 100,000+ bu...1 published contract55.1TensorDockTensorDock operates a global GPU cloud marketplace that connects independent hardware hosts with customers ...1 published contract54.8Cloudflare AI GatewayCloudflare AI Gateway is a managed LLM proxy that sits in front of 23+ AI providers (OpenAI, Anthropic, Goo...1 published contract54.5FitbitFitbit is a wearable health and fitness platform — devices (trackers, smartwatches, smart scales) plus a co...11 published contracts54.3
Developing 20 Usable, with meaningful gaps to close
Track-PODTrack-POD is a cloud-based delivery management platform that combines route planning and optimization with ...1 published contract52.2WherebyWhereby is an embeddable video API plus standalone meetings product that lets developers add browser-based,...1 published contract52.2Help ScoutHelp Scout is an email-first help desk platform with shared inboxes, live chat, knowledge bases, and a cust...17 APIs51.7KnitKnit is a unified API platform for B2B products, AI agents, and MCP clients, providing integrations infrast...1 published contract51.6FrontFront is a customer operations platform unifying shared inboxes, chat, SMS, social, and CRM workflows. Fron...2 published contracts51.3SupabaseSupabase is an open-source Firebase alternative that provides a suite of backend services built on top of P...5 published contracts49.1ThoughtlyThoughtly is an AI voice and chat agent platform that helps revenue and support teams contact every lead ac...1 published contract48.9MapboxMapbox is a leading mapping and location data platform that provides tools and services to help developers ...12 APIs47.7LunarLunar is an enterprise-grade API management and AI control plane platform that provides a unified gateway f...3 published contracts47.5VTEXVTEX is a global enterprise digital commerce platform that provides end-to-end solutions for businesses to ...44 published contracts47.5WHOOPWHOOP is a fitness and recovery wearable platform providing a REST API for accessing sleep, recovery, strai...2 published contracts47.2UnkeyUnkey is the developer platform for modern APIs, providing globally distributed API key management, rate li...1 published contract47.0HostawayHostaway is an AI-powered vacation rental management platform that consolidates property management, channe...16 APIs46.8DiscordDiscord is a voice, video and text communication service used by hundreds of millions of people to hang out...1 published contract46.4Holiday APIHoliday API is a commercial reference-data service that delivers verified public holidays, observances, cou...1 published contract44.5FreshworksFreshworks is a software company that develops cloud-based business software including customer support, IT...6 published contracts41.9Apache DubboApache Dubbo is a high-performance, Java-based open-source RPC framework that provides service discovery, t...1 published contract41.5NOAA — National Oceanic and Atmospheric AdministrationThe National Oceanic and Atmospheric Administration (NOAA) is the United States scientific and regulatory a...1 published contract40.9PolarPolar Electro Oy (operating as Polar Global) is a Finnish sports and fitness technology company founded in ...2 published contracts39.7API SnapAPI Snap is a developer utility platform that consolidates 13+ commonly needed REST APIs into a single, uni...1 published contract39.6
Thin 14 Limited public surface area
TypesenseTypesense is a fast, typo-tolerant, open-source search engine designed for developer productivity. It provi...2 published contracts38.8Apache JamesApache James (Java Apache Mail Enterprise Server) is a portable and enterprise-ready mail server built enti...1 published contract38.6TrackingMoreTrackingMore is a multi-carrier shipment tracking platform offering a unified REST API that integrates with...1 published contract38.1KreaKrea is a real-time AI creative suite that lets designers, filmmakers, brand teams, and everyday creators g...1 published contract37.7RavelinRavelin is a London-based fraud detection and prevention platform offering AI-native, real-time decisioning...2 published contracts37.7AI GatewayAn API Evangelist landscape index of AI gateways — the LLM routers, prompt firewalls, model fallback proxie...1 published contract37.4Kong AI GatewayKong AI Gateway is the AI-native capability layer built on top of Kong Gateway and managed through Kong Kon...21 APIs37.0Ron Swanson QuotesA community-built, open source HTTP API that returns Ron Swanson quotes from the NBC television series Park...1 published contract34.4AmbassadorAmbassador is a Kubernetes-native API Gateway built on Envoy Proxy, providing routing, load balancing, auth...1 published contract34.3APIParkAPIPark is an open-source, cloud-native AI gateway and API developer portal that helps developers and enter...1 published contract30.9GlamaGlama is an all-in-one AI workspace combining an MCP server marketplace and registry, a managed MCP gateway...7 APIs29.7Volvo CarsVolvo Cars is a Swedish premium automotive OEM (headquartered in Gothenburg, owned by Geely) that operates ...4 APIs29.5BlynkBlynk is a low-code / no-code IoT software platform that helps companies prototype, deploy, and remotely ma...3 APIs27.5RakenRaken is a San Diego-based construction technology company providing a field-first daily reporting and fiel...1 API26.6
Emerging 2 Early or largely undocumented
JSONPlaceholderJSONPlaceholder is a free, no-auth fake REST API for prototyping, tutorials, and testing. It exposes six re...1 published contract25.3Agify.ioAgify.io is a simple REST API that predicts the age of a person based on their first name. Using a large da...2 APIs18.8
Minimal 1 Almost no public developer surface
Punk APIPunk API is a free, no-auth REST API exposing BrewDog's "DIY Dog" open-source beer recipe collection — 325 ...1 published contract0.0

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.

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 hoursPer-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 capsPlan-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 ManagementREST Admin API with leaky-bucket throttling (40 req/app/store)Rate Limit HeadersRate Limiting

Showing 40 of 63 declared variants

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