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API3 provides data feeds and pays dApps for using them. It reports more than 100 data feeds on every chain. AirnodeHub is described as a marketplace where agents discover, call and pay for APIs, with the data source paid for each response. It is in early access and expected to keep changing and pivot.
NASA API is a developer tool, library, or framework for building, testing, or maintaining software.
A generator that produces random, fictional identities including names, addresses, phone numbers, emails, usernames and passwords, described for software testing, sample data and writing. It is free and needs no account; signing in allows saving identities, bulk orders and API use. An API returns identities as JSON repeatable with a seed.
Telegram Bot API is an HTTP-based interface created for developers to build bots for Telegram. Bots are small applications that run entirely within the Telegram app, and users interact with them through flexible interfaces supporting various tasks and services. The platform is free for both users and developers, and bots can use commands, keyboards, inline buttons and Mini Apps built with JavaScript.
Ampache is a web-based audio and video streaming application and file manager that provides access to a music and video collection from internet-enabled devices. It is free and open source under AGPLv3 and serves one catalog over its native API, Subsonic and OpenSubsonic, a Jellyfin-compatible backend, UPnP/DLNA and DAAP.
The GitHub organization for AnimeThemes hosts the software behind its anime opening and ending theme database, including the website, server and API documentation.
Brandfetch is a brand data platform that provides access to logos, colors, fonts and brand assets for millions of companies. Brand data can be integrated into applications through APIs, with plans covering free, monthly and custom enterprise options.
Google Codelabs are guided, hands-on coding tutorials. Most step through building a small application or adding a new feature to an existing application. Topics covered include Android Wear, Google Compute Engine, ARCore and Google APIs on iOS.
Google Speech Gen helps build, test, automate, or manage AI agents, prompts, models, and API workflows.
Hyper-V documentation from Microsoft covering the top level functional specification and APIs for developers. It describes interfaces used by guest software to detect a hypervisor and query its capabilities, features and version information, including CPUID leaves, model-specific registers and hypercalls.
Library Genesis (libgen.la) is a digital library providing access to a wide range of materials including scientific articles, fiction, comics, magazines, and standards. It offers search functionality, content downloads via multiple methods, mirror sites, and supplementary tools such as an API, RSS feeds, and bibliographic search services.
A cloud GPU password recovery and credential auditing service for data the user owns or is authorized to test. It supports Office, ZIP, PDF, Wi-Fi captures, NTLM and AD hashes, with a free Basic Search and optional paid custom GPU jobs and unlocks. An authenticated REST API and MCP tools are documented. Uploaded files are deleted after hash extraction.
Weather data platform offering forecasts, current conditions, maps, and weather APIs.
PrivacySpy is an open project that grades and monitors privacy policies on a ten-point scale for convenience and accountability. It maintains a directory of products with scores, offers a free browser extension and API, and is maintained by volunteers. It is a project of Politiwatch, a registered 501(c)(3) organization.
Python tool for scraping public posts and profiles from social networks without using official platform APIs.
Developer Q&A site for programming problems, debugging, APIs, frameworks, and software engineering.
Tinify maintains repositories for smart image compression for PNG and JPEG. Its public repositories include API client libraries for Node.js, PHP, Java, Python, Ruby and .NET, plus a WordPress plugin that optimizes JPEG and PNG images with TinyPNG. The organization also shares a list of third-party integrations.
The Twitch Developers site provides documentation and products for building third-party experiences with Twitch. Products include Twitch API, EventSub, Extensions, Chat and Chatbots, PubSub, Embedding Twitch, Drops, game engine plugins and authentication.
