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REST API and SDK that lets AI agents send iMessage, RCS, and SMS through one integration.
messages.dev gives developers a single REST API and TypeScript SDK for sending iMessage, RCS, and SMS messages, aimed specifically at AI agents that need to text people rather than traditional marketing use cases. It supports tapback reactions, typing indicators, and read receipts, and delivers incoming message notifications within milliseconds through webhooks. Infrastructure, including provisioning and scaling, is fully managed rather than something the developer runs. A free sandbox gives 50 messages a day for testing, a paid Line plan adds a dedicated phone number with unlimited messages, and larger deployments need a custom Enterprise agreement. The company does not disclose its founders or country on the site.
The Sandbox tier is free with 50 test messages a day; the Line plan is $99 per phone number per month with unlimited messages; Enterprise volume pricing is custom.
Use tool ↗messages.dev solves a real gap — iMessage has no official API — by wrapping iMessage, RCS, and SMS behind one endpoint aimed at AI agents that need to text people. The free sandbox makes it easy to test, but the product is new enough that neither the company behind it nor a track record for delivery reliability is publicly documented yet.
Watch out: Founder and company identity are not disclosed, so there is no track record to check before relying on it for production messaging.
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