Datamuse vs GitHub Contribution Chart Generator

Datamuse is a free word-finding query engine for autocomplete, rhyme, and meaning-based lookups; a live unauthenticated GET against `api.datamuse.com/words` returned a 200 JSON array with `Access-Control-Allow-Origin` echoing the request Origin plus `Access-Control-Allow-Credentials: true`, resolving cors "unknown" to "yes". Its own homepage now states that starting January 1, 2027 an API key will be required on every request (capped at 100,000/day per key) after more than a decade of fully free access — as of this check the API still works with no key at all.

This is a keyless JSON API (not an image-rendering service, despite the name) with a single route, `/api/v1/{username}`, that returns a GitHub user's daily/yearly contribution counts — confirmed by inspecting the project's own source tree, which contains only one API file (`src/pages/api/v1/[username].js`); the actual chart image is drawn client-side from that JSON by a separate canvas library. A live unauthenticated GET returned a 200 JSON payload with no `Access-Control-Allow-Origin` header at all, correcting cors from "yes" to "no" (the header only appears on Vercel's default 404 page, not on the real route). Free and open-source, self-hostable on Vercel.