11 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Use when an agent needs base block number. Returns Fetch the current Base mainnet block number from redundant public RPCs and return structured JSON with source and freshness metadata. $0.002.
Cheapest endpoint: liveness plus x402 payment pipeline check — Returns ok with the server time and whether this call was paid. Use it to verify your x402 client end to end before spending on data endpoints.
Solve constant-acceleration motion from any three of u, v, a, t, s
Orbital speed, period, escape velocity and Hohmann transfer delta-v between circular orbits
Velocities after a 1D collision with restitution, momentum, energy lost and impact force
Telescope magnification, exit pupil, field of view, limiting magnitude, resolution and camera image scale
Heat to warm, melt or boil a mass, final temperature of mixtures, heater time and wall conduction
Sound speed, wavelength, Doppler shift, decibel addition, distance attenuation and echo distance
Gamma factor, time dilation, length contraction, relativistic energy and velocity addition
Stellar distance, distance modulus, luminosity, radius, spectral class and lifetime
Pipe velocity, Reynolds number, friction, pressure drop, pump power, Torricelli speed and buoyancy