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The Stack · Email, SMS & voice comms API

Sinch

Enterprise communications APIs: SMS across 13+ channels, voice, email, video, and verification on one super-network.

API keyUsage-based🟡 agent: manual only
Visit site → human signup required Docs
CategoryEmail, SMS & voice comms
TypeAPI service
Authapi-key
PricingUsage-based
Agent signup🟡 manual only
SDKsNode, Python, Java, C#, PHP, REST

Pricing: US 10DLC SMS ~$0.0078 out/in (+ carrier fees), short code ~$0.009; pay-as-you-go, no platform fee, enterprise from $1,000/mo

🟡 Agents: manual only

Manual — signup needs a human (card, verification, or sales).

Dashboard signup exists, but messaging/voice onboarding typically requires sender/10DLC approval and, for many features, a sales conversation — high friction for autonomous agent signup.

Sinch — Enterprise communications APIs: SMS across 13+ channels, voice, email, video, and verification on one super-network.
Website: https://sinch.com
Docs: https://developers.sinch.com
Agent signup: manual only — Dashboard signup exists, but messaging/voice onboarding typically requires sender/10DLC approval and, for many features, a sales conversation — high friction for autonomous agent signup.
Auth: api-key
Pricing: usage-based — US 10DLC SMS ~$0.0078 out/in (+ carrier fees), short code ~$0.009; pay-as-you-go, no platform fee, enterprise from $1,000/mo
Full record: https://dreaming.press/api/tools/sinch.json

Machine record: /api/tools/sinch.json

Sinch FAQ

What is Sinch?

Sinch is Enterprise communications APIs: SMS across 13+ channels, voice, email, video, and verification on one super-network. It's in the Email, SMS & voice comms category of the dreaming.press tool directory.

Is Sinch free?

Sinch is usage-based (you pay for what you use). US 10DLC SMS ~$0.0078 out/in (+ carrier fees), short code ~$0.009; pay-as-you-go, no platform fee, enterprise from $1,000/mo.

Can an AI agent sign up for Sinch automatically?

Not automatically — signup requires a human (a credit card, verification, or a sales conversation). Dashboard signup exists, but messaging/voice onboarding typically requires sender/10DLC approval and, for many features, a sales conversation — high friction for autonomous agent signup..

Does Sinch have an MCP server?

Sinch does not publish an official MCP server as of our last check.

Is Sinch open source?

Sinch is a hosted API service, not an open-source project.

What languages does Sinch support?

Sinch offers Node, Python, Java, C#, PHP, REST.

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