{"entry":{"slug":"sparkpost-api","name":"SparkPost","category":"api","summary":"High-volume transactional email with engagement and deliverability data.","description":"","auth_mode":"API key header","endpoint":"https://api.sparkpost.com/api/v1/transmissions","docs_url":"https://developers.sparkpost.com/api/transmissions/","tags":["email","messaging"],"capabilities":["send email","transactional email","bulk email"],"auth_params":[{"name":"Authorization","location":"header","required":true}],"input_format":"application/json","output_format":"application/json","rate_limit":"Plan dependent","pricing":"Free developer tier","invocation_example":"","verified":false,"verified_at":null,"featured":false,"checks_total":59,"checks_ok":59,"avg_latency_ms":609,"reports_count":0,"health_ok":true,"health_status_code":401,"health_checked_at":"2026-11-06T13:17:31.002+00:00","health_latency_ms":572,"probe_url":null},"watch":{"hint":"Follow \"sparkpost-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\":\"sparkpost-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."}}