Pixela vs UPS

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.

UPS's REST APIs cover package tracking, rating, address validation, and label creation, authenticated via OAuth 2.0 client-credentials bearer tokens issued by the developer portal — the legacy Access Key scheme was retired for all UPS REST APIs in 2024. Calls carry no separate API fee: access is free for UPS account holders, who instead pay UPS directly for the shipments and services the calls represent.