Free tools

Try Onekey on real public data, no account needed. Every tool runs real endpoints and shows the exact API call behind its result, the credits it used and the response as it came back.

Creator cardType one handle and see the profile it has on nine platforms side by side: name, bio, followers and following, with honest nulls where a platform does not publish a number.creator/cardBuild a creator card
Profile viewerPick a platform and a handle and get the profile in the unified schema: the same field names on every platform, the raw API call shown next to it.bluesky/profile, hackernews/user, devto/profile and six moreView a profile
Engagement rate calculatorMeasure the engagement rate of a Bluesky account or of one post link, using the computed block. Shows the formula, and a null wherever the source gives nothing to divide by.bluesky/posts, bluesky/profile, lookupMeasure engagement
Brand mention checkerSee where a brand or product is mentioned across Hacker News, Bluesky, DEV, Lemmy and Stack Exchange: volume per platform, the top mentions and the top authors.reports/brand-mentionsCheck a brand
Package and repo lookupLook up a package or project on npm, PyPI, crates.io, RubyGems, Docker Hub, GitLab or Hugging Face: latest version, downloads, stars, dates and links in one shape.npm/package, pypi/package, crates/crate and four moreLook up a package
Trend snapshotEnter a topic and get what Hacker News, DEV and Bluesky are saying about it, fused into one ranked list, with a free dry-run cost preview before you spend anything.search/universalTake a snapshot
URL to dataPaste a public link to a profile, post, package or project and see which endpoint answers it and the unified data it returns, with the lookup call behind it.lookupGet data from a URL

The tools use a shared demo key with small limits, and only endpoints that are free to serve. Your own key has no such limits: get 1,000 free credits.

Developer utilities

Small helpers that run in your browser and never call the API.

Webhook signature verifier: Check a signed webhook in your browser.
URL to endpoint finder: Which endpoint answers this URL?.
Credit cost calculator: Estimate credits and pick a pack.
Schema field explorer: Browse the canonical fields.

There is no cursor decoder. Pagination cursors are opaque on purpose: send next_cursor back verbatim, with the same other parameters, and the next page comes back. See Pagination.