Was it the cold, or a defect? Signed.
EV range and charging disputes and warranty claims hinge on the ambient conditions during the trip. Cold and headwind cut range without any defect, so before anyone argues the battery is faulty, the neutral starting point is what the weather actually was at the route and time. This page returns one signed, independently re-verifiable record of the conditions at a city right now, produced at the moment it mattered. Every reading Dynamic Feed serves is archived, so what the source said at time T stays re-checkable when the claim lands months later.
The conditions on the trip, right now.
Enter the city on the route. Dynamic Feed evidences the cold threshold with a signed trigger receipt (temperature at or below your threshold), and observes the full live conditions (temperature, wind and precipitation) through /v1/answer. When a second independent source responded, the concordance line shows it as corroboration. Nothing is mocked and nothing is stored about you.
full signed receipts (JSON)
Range loss is decided on records.
Cold ambient temperature, wind chill and headwind reduce usable range and slow charging, and none of that is a fault in the vehicle. When an owner reports lost range or a warranty claim reaches dispute, the first question is what the conditions were during the trip, because environmental loss and a defect look the same on a dashboard. Screenshots of a weather app after the fact do not survive scrutiny. A contemporaneous record from an independent witness, signed at the moment, carrying its source and observation time, and verifiable years later against a published key, is corroboration both sides can test. Our records work for owners, manufacturers and their insurers alike: anyone can re-check them, including the other side, and the archived reading for time T does not change when the dispute does.
Evidence, not a verdict on the battery.
Dynamic Feed is a neutral witness, not a manufacturer, insurer or adviser. This receipt is an advisory record of the ambient conditions a named public source reported for the city at that moment. It does not rule on whether the battery or vehicle is defective, does not measure the vehicle's own range or state of charge, and does not replace the vehicle's telemetry or a technician's inspection; range models, warranty terms and consumer laws vary by maker, product and country, so the interpretation stays with your people. It sits beside the vehicle's own telemetry as one independent input. Advisory evidence, tamper-evident not tamper-proof, zero personal data, and not legal advice.
One API call per range claim.
Warranty and fleet platforms can mint a signed conditions receipt the moment a range complaint is logged, keyless to try, self-serve to scale.