API lifecycle platforms, GraphQL runtimes, gateways, frontend data layers, transactional APIs, and webhook infrastructure for modern product and AI teams.
23 tools found
40M developers, 98% of Fortune 500
AI-native API platform for designing, testing, documenting, cataloging, and automating APIs and services across shared team workspaces.
78K GitHub stars, 3M+ developers
Open-source API client for quickly testing REST, GraphQL, and realtime endpoints with a fast web interface and optional self-hosted deployment.
Trusted by Netflix, Nasdaq, Red Bull
Collaborative API client by Kong for debugging, testing, and designing REST, GraphQL, gRPC, and event-driven interfaces across local and team workflows.
5M+ developers using world's largest API hub
API marketplace and distribution hub for discovering, publishing, monetizing, and governing third-party APIs through one developer-facing catalog.
28.7K GitHub stars, industry standard
OpenAPI-first toolkit for editing, documenting, visualizing, and generating code from API contracts across spec-driven development teams.
35K+ stars, used by Netflix & PayPal
End-to-end TypeScript API framework that keeps client and server types in sync without code generation, making internal product APIs faster to evolve safely.
43K+ developers using GraphQL Yoga
GraphQL server runtime for modern JavaScript stacks with subscriptions, streaming, and adapters for Node, serverless, and edge environments.
351K+ websites using Apollo GraphQL
GraphQL orchestration platform for federated supergraphs with governance, routing, observability, and an API layer that serves web, mobile, and agent experiences.
Trusted by Airbus, Pipe, Philips
GraphQL API platform that turns operational data into governed APIs with authorization rules, realtime capabilities, connectors, and production-ready delivery.
World's most adopted open-source API gateway
Cloud-native API gateway for traffic control, policy enforcement, observability, and AI-era connectivity across APIs, services, LLM gateways, and MCP-style access.
335K+ enterprises trust Stripe
Financial infrastructure API for payments, billing, subscriptions, platform monetization, and commerce workflows with global scale and deep developer tooling.
290K+ companies, 10M+ developers
Communications platform API for messaging, voice, email, verification, and customer engagement workflows with global delivery infrastructure.
1M+ users, 1.4M weekly npm downloads
Developer-first transactional email API with React email workflows, event webhooks, and fast delivery primitives for modern product teams.
99.9% reliability trusted at scale
Serverless messaging and scheduling layer that sits in front of your HTTP endpoints to guarantee delivery, retries, fan-out, and delayed execution for API workflows.
Enterprise AI model routing
Unified API gateway for 200+ AI models. Access OpenAI, Anthropic, Google, Meta, and open-source models through one endpoint.
100+ LLMs unified interface
Open-source AI gateway and proxy. Call 100+ LLM APIs in the OpenAI format with load balancing, fallbacks, and spend tracking.
500+ AI models in single API
Unified API for AI services. Access NLP, vision, speech, and generative AI from multiple providers through one platform.
5,100+ companies using Axios
Promise-based HTTP client for browser and Node.js apps with interceptors, cancellation, and a simple request layer for REST and GraphQL calls.
48K+ GitHub stars, 16M weekly downloads
Async state and data-fetching layer for TS/JS apps with caching, invalidation, optimistic updates, retries, and server-state tooling across major frontend frameworks.
Postman alternative with API mocking & testing
API lifecycle workspace for designing, mocking, testing, documenting, and collaborating on REST, GraphQL, and gRPC APIs from one place.
37.8K GitHub stars, 31M weekly downloads
TypeScript-first schema validation library for defining API contracts once and reusing them for runtime checks, type inference, and JSON-schema-style tooling.
40K GitHub stars, 600K monthly users
Git-native API client for exploring and testing REST, GraphQL, and gRPC endpoints with local collections that stay in your filesystem instead of a hosted workspace.
Used by 527k developers
React data layer built around stale-while-revalidate caching, focus-based revalidation, optimistic mutation flows, and simple API fetching ergonomics.
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