{"entry":{"slug":"mattermost-api","name":"Mattermost","category":"api","summary":"Self-hostable team chat with a full REST API for posts, channels and users.","description":"","auth_mode":"Bearer personal access token","endpoint":"https://<server>/api/v4/posts","docs_url":"https://api.mattermost.com/","tags":["chat","messaging"],"capabilities":["send chat message","team chat","post to channel"],"auth_params":[{"name":"Authorization","location":"header","required":true}],"input_format":"application/json","output_format":"application/json","rate_limit":"Server configured","pricing":"Free self-hosted edition","invocation_example":"","verified":false,"verified_at":null,"featured":false,"checks_total":52,"checks_ok":51,"avg_latency_ms":438,"reports_count":0,"health_ok":null,"health_status_code":null,"health_checked_at":"2026-11-06T03:17:13.303+00:00","health_latency_ms":null,"probe_url":null},"watch":{"hint":"Follow \"mattermost-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\":\"mattermost-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."}}