{"entry":{"slug":"smtp2go-api","name":"SMTP2GO","category":"api","summary":"Transactional email over a JSON endpoint or plain SMTP relay.","description":"","auth_mode":"API key header","endpoint":"https://api.smtp2go.com/v3/email/send","docs_url":"https://apidoc.smtp2go.com/documentation/","tags":["email","messaging"],"capabilities":["send email","transactional email","smtp relay"],"auth_params":[{"name":"X-Smtp2go-Api-Key","location":"header","required":true}],"input_format":"application/json","output_format":"application/json","rate_limit":"Plan dependent","pricing":"1k emails/month free","invocation_example":"","verified":false,"verified_at":null,"featured":false,"checks_total":59,"checks_ok":59,"avg_latency_ms":1056,"reports_count":0,"health_ok":true,"health_status_code":405,"health_checked_at":"2026-11-06T14:17:33.724+00:00","health_latency_ms":828,"probe_url":null},"watch":{"hint":"Follow \"smtp2go-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\":\"smtp2go-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."}}