Developer builds GeoPulse API for fast city autocomplete with 800,000+ global locations

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A developer has built GeoPulse, a city search API covering over 800,000 populated places worldwide, designed to address the limitations of existing public location services such as strict rate limits and high latency. The API combines GeoNames records with Wikidata entities to provide city search, radius lookups, and administrative hierarchies including coordinates, timezones, and elevation data. A tutorial published on DEV Community demonstrates how to implement a debounced city autocomplete input in vanilla JavaScript using the GeoPulse endpoint hosted on RapidAPI. The implementation waits 250 milliseconds after a user stops typing before firing a request, returning results sorted by population so major cities appear first. The guide also covers radius-based distance queries, making it suited for use cases like address forms, shipping calculators, and travel applications.

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