{"entry":{"slug":"clicksend-api","name":"ClickSend","category":"api","summary":"SMS, voice, fax and postal letters from one REST API.","description":"","auth_mode":"HTTP Basic","endpoint":"https://rest.clicksend.com/v3/sms/send","docs_url":"https://developers.clicksend.com/docs/rest/v3/","tags":["sms","messaging"],"capabilities":["send sms","send letter","send fax"],"auth_params":[{"name":"Authorization","location":"header","required":true}],"input_format":"application/json","output_format":"application/json","rate_limit":"Account dependent","pricing":"Per message","invocation_example":"","verified":false,"verified_at":null,"featured":false,"checks_total":58,"checks_ok":58,"avg_latency_ms":331,"reports_count":0,"health_ok":true,"health_status_code":404,"health_checked_at":"2026-11-05T21:17:04.424+00:00","health_latency_ms":315,"probe_url":null},"watch":{"hint":"Follow \"clicksend-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\":\"clicksend-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."}}