API Management service catalog

Video conferencing SDK and infrastructure platform for embedding real-time video, audio, and interactive live streaming.

Real-time messaging platform providing reliable pub/sub, presence, and data streaming infrastructure for developers.

Real-time engagement API platform for adding voice, video, interactive live streaming, and messaging to applications.

Full-lifecycle API management platform for designing, securing, and scaling APIs.

Open-source low-code platform for building internal tools and admin panels with drag-and-drop UI builders.

Open-source API client designed to replace Postman and Insomnia, storing collections directly in the file system.

Notification infrastructure API for designing and delivering user notifications across email, SMS, push, and Slack.

Crossref runs open infrastructure to link research objects, entities, and actions, creating a lasting and reusable scholarly record that underpins open science. Together with our 24,000 members in 166 countries, we drive metadata exchange and support 2 billion monthly API queries, facilitating global research communication, for the benefit of society.

Open-source headless CMS and data platform wrapping any SQL database with a real-time API and app builder.

GeoJS is a free, public IP geolocation API returning country, region, timezone, and ASN details through JSON, JSONP, and GeoIP-style HTTP endpoints for developer use.

IP geolocation software and plugin to detect visitor location in real time. Personalize content, redirect users, show local currency. Works with any website.

Accelerate API development with Postman's all-in-one platform. Streamline collaboration and simplify the API lifecycle for faster, better results. Learn more.

Grafbase provides secure, self-hosted deployment options, unmatched query speed, and unified data access for reliable, enterprise-grade GraphQL API management.

Open-source API platform for creating, managing, and monitoring REST, GraphQL, and event-driven APIs.

Instant GraphQL and REST APIs over new or existing databases providing real-time subscriptions and fine-grained access control.

From webhooks to external event streams, Hookdeck ensures every event is received, processed, and monitored reliably at scale, giving you complete visibility and control.

Open-source lightweight API development suite with REST, GraphQL, WebSocket, and gRPC support.

We maintain and develop the Hypertext Transfer Protocol - the core protocol of the World Wide Web

ifconfig.me is a free web service that returns the visitor's public IP address, user agent, and HTTP headers in plain text or JSON, commonly used in shell scripts to query egress IP from CLI.

Open-source REST and GraphQL API client providing a rich GUI for designing, debugging, and testing APIs.

IP-API is a geolocation and IP lookup API service that returns geographic and network information for any IP address, including country, region, city, latitude/longitude, ISP, and organization. It offers a free tier for non-commercial use and paid plans for higher request volumes and commercial applications.

KVK biedt informatie, voorlichting en ondersteuning aan ondernemers. Betrouwbaar advies en praktische tools voor het starten en runnen van je bedrijf.

Powerful open-source CMS and app framework for Node.js providing a GraphQL API and a beautiful admin UI.

Cloud-native API gateway and service mesh platform for managing, securing, and observing APIs.