SMS · RCS · WhatsApp · AI agents
One API for SMS, RCS and WhatsApp, built on direct operator connectivity — with delivery receipts you can reconcile line by line against an invoice.
Same audience lists, same compliance layer, same delivery reporting — whichever way the message goes out.
DLT-registered A2P at carrier scale — promotional, transactional, service and OTP on one pipe.
Learn more →Verified sender, branded cards and suggested replies on Android, falling back to SMS automatically.
Learn more →Utility and marketing templates through the Cloud API, billed per conversation.
Learn more →Hand an inbound reply to your own model over webhook and send its answer back on the same thread. Two-way SMS, RCS and WhatsApp as an agent transport.
Learn more →REST for everything, SMPP when you need a bind. Receipts arrive on your webhook carrying the message id you sent us, so reconciliation is a join rather than a guess.
curl https://nexistxt.com/api/v1/send \
-H "Authorization: Bearer $NEXISTXT_KEY" \
-H "Content-Type: application/json" \
-d '{
"to": ["919820012345"],
"sender": "METNDE",
"template_id": "1777178539978637333",
"vars": ["GANGA", "1.96"]
}'Fund a wallet and send what you need. Cancel a campaign before it goes out and the unsent portion is refunded automatically.