An enterprise SMS API lets software teams send, receive, monitor, and automate text messages programmatically. Tells combines API access — SMS, MMS, RCS, AI voice calls, call announcements, and number-intelligence lookups over REST with OAuth2 and webhooks — with operational support for high-volume US and Canada messaging programs. Buyers should verify endpoint coverage, authentication, webhooks, rate limits, sender support, and implementation assistance before selecting a provider.
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