SendAPI
One REST API and one key for WhatsApp, SMS, OTP and transactional email, with QR-based WhatsApp and no Meta review
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sendapi.coAbout SendAPI
SendAPI is a unified messaging API that puts WhatsApp, SMS, OTP verification and transactional email behind one REST endpoint and one API key, which is the specific pain it targets: most teams end up with a separate account, a separate SDK and a separate billing relationship per channel. WhatsApp connects through your own number with a QR scan and requires no Meta application, which removes the approval step that normally blocks small teams from the channel entirely; it supports notifications, rich media including images, PDFs and video, and two-way conversations. SMS reaches carriers in over 190 countries, with built-in OTP verification flows and multi-channel failover that escalates SMS to WhatsApp to email when a message does not land. Transactional email runs on dedicated IP pools with DKIM, SPF and DMARC configured and real-time delivery webhooks for password resets, receipts and notifications. The developer experience is the pitch: self-serve signup with no sales call, type-safe SDKs for TypeScript, Python and other languages, and flat monthly pricing rather than per-message metering, so the bill is predictable at planning time. SMS is billed separately through top-up credit packages, with bonus credits on the larger packs, so the recurring plan covers email and WhatsApp volume while carrier costs stay a variable line the buyer controls directly.
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