{"entry":{"slug":"open-topo-data-api","name":"Open Topo Data","category":"api","summary":"Elevation from multiple public DEM datasets over a keyless endpoint.","description":"","auth_mode":"None","endpoint":"https://api.opentopodata.org/v1/<dataset>","docs_url":"https://www.opentopodata.org/api/","tags":["geo","open-data"],"capabilities":["elevation lookup","terrain data"],"auth_params":[],"input_format":"Query parameters","output_format":"application/json","rate_limit":"1 req/s, 1k calls/day on the public instance","pricing":"Free (MIT, self-hostable)","invocation_example":"","verified":false,"verified_at":null,"featured":false,"checks_total":56,"checks_ok":56,"avg_latency_ms":56,"reports_count":0,"health_ok":true,"health_status_code":404,"health_checked_at":"2026-11-06T14:17:34.81+00:00","health_latency_ms":58,"probe_url":null},"watch":{"hint":"Follow \"open-topo-data-api\": get alerted when it goes down, comes back, or changes shape. Free, 3 tools per key. Email follows are confirmed by a one-click email before alerts start.","how":"POST https://agentnexus.app/api/public/watch with {\"slug\":\"open-topo-data-api\"} and your x-api-key (the key's email gets the alerts), or add \"email\" / \"webhook_url\". Email follows must be confirmed from the inbox before alerts start."}}