Pixela vs WeCanTrack

Pixela is a single-developer, open-source habit- and effort-tracking service: every action goes through its REST API, turning daily counts, weight logs, or commit streaks into a GitHub-contribution-style graph. Callers register with a self-chosen token via `/v1/users`, then post daily values that render back as an embeddable SVG graph or badge — no dashboard beyond the API itself. Nearly every feature is free; a handful of extras (logo placement, priority support) are reserved for Patreon backers.

WeCanTrack is an affiliate-marketing attribution service whose Public Clickout API rewrites an outbound affiliate link with a tracking sub-ID before redirecting the shopper, letting merchants tie clicks back to conversions across 450+ affiliate networks. Every call carries a per-account API key (via header or query string), and the public clickout endpoint is IP-throttled to 30 requests/minute to keep redirect latency low. There's no ongoing free tier — plans start at $69/month after a 15-day trial.