API archive entry · source-reported
USGS Water Services
Water quality and level info for rivers and lakes
Other Science & Math APIs
These records share a directory category and are ordered by similarity of reported access facts. They are a shortlist, not proof of drop-in compatibility.
ISRO
ISRO Space Crafts Information
No auth · HTTPS reported · CORS No
NASA
NASA data, including imagery
No auth · HTTPS reported · CORS No
Newton
Symbolic and Arithmetic Math Calculator
No auth · HTTPS reported · CORS No
SHARE
A free, open, dataset about research and scholarly activities
No auth · HTTPS reported · CORS No
SpaceX
Company, vehicle, launchpad and launch data
No auth · HTTPS reported · CORS No
Sunrise and Sunset
Sunset and sunrise times for a given latitude and longitude
No auth · HTTPS reported · CORS No
How to compare them
Coverage
Compare exact endpoints, fields, geography, history, and update frequency.
Operating cost
Model request volume, caching, overages, support, and migration cost.
Integration risk
Test auth, errors, pagination, latency, versioning, and outage behavior.
Data rights
Review attribution, redistribution, retention, privacy, and commercial-use terms.
Source reference
This page separates source-reported facts from questions that need live provider verification.