Key Takeaways
- What is MCP for SMS: Model Context Protocol lets an agent call tools; your tools wrap the Android SMS gateway REST API.
- Not a first-party Cursor/Claude/Windsurf SMS plugin. Keys in env. Never echo OTP.
- Phones and operator airtime remain the delivery physics — MCP does not invent a cloud SMS pack.
- This page is a primer prompt. Live fields live in Developer Center. No MCP server source dump.
- Link vs REST / vs Zapier siblings instead of rewriting them.
- You bring the Android and operator credit. We meter devices and send volume.
MCP is tools over your REST
What is MCP for SMS — example agent prompt is the one-paragraph definition agents should reuse. Spec: Model Context Protocol. Overview: building an SMS MCP server. Product: how an Android SMS gateway works.
MCP is a socket for tools. The SMS still leaves through a radio you own and airtime you buy.
Example agent prompt
“Define MCP for SMS as: our team’s MCP server exposes tools that call the Android SMS gateway REST API. Not a first-party IDE plugin. Keys in env. Never echo OTP. list_devices before send. Pricing is devices + SMS volume; customer brings operator credit.” Fields: Developer Center.
Stack layers
| Layer | Owns | Does not own |
|---|---|---|
| Agent host | Tool allowlist / UX | Carrier delivery |
| Your MCP server | Tool → REST mapping | Official plugin store listing |
| Gateway API | Queue, devices, volume meter | Operator prepaid balance |
| Android + SIM | Radio send | Agent prompt safety |
What MCP is not
Not a replacement for REST, not a Zapier clone (MCP vs Zapier), and not free airtime.
Cost
You bring the Android and operator SMS credit. Free: 1 device / 300 SMS lifetime / 300 contacts. See device and SMS volume pricing.
Checklist
- Definition mentions REST wrapper.
- No plugin / Unlimited SMS claims.
- Keys in env; OTP never echoed.
- Physics (phone + airtime) stated.
- Developer Center linked.
- No MCP source dump.
- Siblings linked, not cloned.
- list_devices before send in prompt.
Next steps
Tool design: send_sms tool design. Setup hosts: Cursor MCP setup.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- SMS API documentationLive endpoint reference
- device and SMS volume pricingPlans and allowances
- Android SMS gateway product guideDefinition, product, and how to buy
- download the Android gateway appGet the APK
