{"service":"Fax","brand":"zfax","description":"Fax is the agent-native fax API powered by zfax. Send PDF documents to real fax numbers from AI agents, workflows, and automations without a Sinch account, fax hardware, or a subscription. Upload or link a PDF, pay per page with Zero metered MPP, and receive a faxId, tracking URL, delivery status lookup, and temporary PDF preview. Built for reliable business fax delivery across forms, authorizations, contracts, records, finance paperwork, legal documents, healthcare administration, and government workflows.","discovery":"/openapi.json","endpoints":{"/v1/faxes":"POST - paid Zero route to send a PDF fax","/v1/faxes/:faxId":"GET - check fax status","/upload":"POST - compatibility helper for multipart PDF upload","/api/track/:token":"GET - tracking data for status page","/file/:key":"GET - temporary uploaded PDF","/healthz":"GET - service health"}}