CONTINUOUSLY CRAWLED & HAND-CLAIMED

Every API on the internet, indexed.

We file public APIs as registry entries. Search the index, claim your listing, and — when you're ready — sell access through our marketplace.

FROM THE INDEX № APD-00346 · detect language № APD-01442 · 1password events api № APD-00085 · art institute of chicago № APD-01414 · yu-gi-oh! № APD-01170 · steam

The Index

54 CATEGORIES · 2,360 LISTINGS
FOR DEVELOPERS
Find the API that actually fits.
01Search and filter the whole index — by auth model, spec format and category.
02Registry records show what the crawler actually observed — dead links included.
03Structured endpoint pages, built from each API's own OpenAPI spec.
BROWSE THE INDEX →
FOR API OWNERS
Your API is probably already in here.
01Claim your listing — one click with an email on your domain, or a DNS record.
02The stamp flips to VERIFIED OWNER and the entry is yours.
03Get seen: featured entries and one sponsored slot per category.
FIND YOUR API →
Get your API in front of the people searching for one.
SEE THE RATE CARD →