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Send_sms Mcp Tool Design Android Sms Gateway: In-Depth Guide

Featured illustration for Send_sms Mcp Tool Design Android Sms Gateway: In-Depth Guide

Send_sms Mcp Tool Design Android Sms Gateway: In-Depth Guide. Long-tail article focused on exact query "send_sms mcp tool design android sms gateway". Expand with examples, limits, FAQ, and links to hub C. Priced by devices and SMS send volume; BYO phone and operator credit. Developer Center owns live API parameters.

Written by the SMS Gateway team for operators who run phones and airtime themselves — not for theoretical cloud SMS demos.

InformationAndroid SMS GatewayIn-DepthHub C
Article
Published
February 21, 2026
Updated
February 24, 2026
Reading time
16 minute read

Key Takeaways

  • Designing a send_sms MCP tool for an Android SMS gateway means wrapping HTTPS/JSON — not inventing a first-party Cursor plugin.
  • Required: destination, text, client_ref, optional device_id. Confirm live names in Developer Center.
  • Failure modes are ops (timeouts, missing args, retry storms) — not exploit PoCs.
  • You bring the Android and operator credit. Platform pricing is devices plus send volume.
  • Return message id and accepted state — never the plaintext OTP to the model.

send_sms MCP tool design for an Android SMS gateway is schema discipline. Concepts: What is MCP for SMS. Failure twin: send_sms failure modes. Spec: MCP. Live JSON: Developer Center.

Pricing: devices and send volume. App: Downloads.

to · text · client_ref · device_id

Optional client_ref is how agents double-send.

send_sms is REST in a costume

MCP does not replace pairing or the radio. MCP overview. curl.

A tool that returns the OTP “so the agent can confirm” is a logger with a SIM attached. Return ids, not secrets.

Tool design table

Design choiceRiskPrefer
Optional toHallucinated MSISDNRequired + allowlist in staging
No client_refTimeout → duplicate SMSRequired idempotency key
No device_idOTP on promo SIMPin quiet device
Echo bodyCodes in tracesid + accepted only
Blind retriesAirtime drainMap errors to your store

Require client_ref

Same key on retry. OTP. MCP auth failures.

Do not echo OTP text

Securing tools. DLR. Messaging practices.

Next steps

Make client_ref required in the schema. Fail closed if missing. Spend 300 lifetime SMS proving one send — then a funded SIM.

Related product pages

Jump to the live product docs for this topic—not another long-form article.

FAQ

Frequently asked questions

Direct answers about send_sms mcp tool design android sms gateway.

How should I design a send_sms MCP tool for an Android SMS gateway?

Thin REST wrapper: required to/text/client_ref, pin device_id for OTP, map 429/timeouts without minting new codes, redact bodies in tool results. Live fields in Developer Center.

Is MCP an official SMS SDK?

No. You host an adapter over HTTPS. Not a Complete SDK product.

Does a tool call include carrier credit?

No. Free is 300 SMS lifetime for proofs.

Should send_sms return the SMS body?

No. Return id + accepted.

Where are live send fields?

Developer Center.
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Browse the full Android SMS gateway knowledge base or return to how an Android SMS gateway works.

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Test the gateway on your own Android phone

Install the app, pair one device, and validate your API flow before choosing a paid plan.

You supply the phone, SIM, and operator SMS credit.

Download the Android appView pricing