Toolkit Atlas
A builder's map of reusable building blocks — free public APIs, UI toolkits, and security-reviewed Claude skills. Find the right piece for your next project.
Spotlight — useful for business & ops work
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51 of 51 categories
Pet, wildlife, and animal-fact APIs.
20 free·26 APIs
Anime, manga, and character databases.
10 free·19 APIs
Threat intelligence and malware scanning.
1 free·15 APIs
Museum collections, color, and design assets.
12 free·22 APIs
Login, identity, and access-control providers.
0 free·7 APIs
On-chain data, wallets, and smart contracts.
6 free·13 APIs
Book metadata, catalogs, and reading data.
20 free·27 APIs
Company data, invoicing, and lead enrichment.
8 free·27 APIs
Events, holidays, and scheduling.
12 free·18 APIs
Upload, store, and deliver files.
4 free·18 APIs
Build pipelines and CI status.
0 free·6 APIs
Crypto prices, markets, and exchange data.
25 free·70 APIs
Fiat FX rates, current and historical.
10 free·19 APIs
Validate emails, phones, addresses, and more.
2 free·7 APIs
Developer tooling and utility APIs.
60 free·134 APIs
Definitions, synonyms, and word data.
5 free·13 APIs
Generate, convert, and manage documents.
2 free·36 APIs
Send, validate, and manage email.
8 free·20 APIs
Jokes, trivia, and fun content.
14 free·16 APIs
Climate, air quality, and sustainability data.
8 free·18 APIs
Concerts, meetups, and ticketing.
0 free·3 APIs
Stocks, markets, banking, and economic data.
10 free·53 APIs
Recipes, nutrition, and restaurant data.
11 free·25 APIs
Game data, comics, and gaming stats.
64 free·97 APIs
Addresses, maps, and location lookup.
46 free·94 APIs
Public records, census, and civic data.
74 free·97 APIs
Medical, nutrition, and wellness data.
27 free·36 APIs
Job listings and recruitment data.
5 free·20 APIs
AI models, NLP, and inference APIs.
5 free·30 APIs
Tracks, lyrics, and music metadata.
11 free·35 APIs
Headlines, articles, and media feeds.
6 free·21 APIs
Government and public open datasets.
25 free·44 APIs
Repos, packages, and project metadata.
8 free·9 APIs
Patent search and intellectual property.
2 free·4 APIs
Quotes, horoscopes, and personality content.
20 free·25 APIs
Phone validation, lookup, and SMS.
1 free·7 APIs
Stock photos and image services.
6 free·29 APIs
Code, coding challenges, and dev content.
1 free·5 APIs
Scientific data and computation.
31 free·35 APIs
Vulnerabilities, breaches, and security data.
17 free·42 APIs
Products, pricing, and e-commerce.
0 free·16 APIs
Social platforms and community data.
9 free·43 APIs
Scores, stats, and fitness data.
20 free·41 APIs
Fake data and placeholder generators.
22 free·27 APIs
NLP: sentiment, translation, extraction.
1 free·18 APIs
Shipment and package tracking.
3 free·11 APIs
Transit, flights, and mobility data.
34 free·74 APIs
Shorten links and track clicks.
10 free·20 APIs
VIN decoding, specs, and vehicle data.
4 free·10 APIs
Video metadata, streaming, and clips.
28 free·45 APIs
Forecasts, conditions, and historical weather.
12 free·34 APIs