Key Takeaways
- A wait-for-OTP agent flow on an Android SMS gateway is send → poll/webhook → verify — with hard timeouts, not endless resends.
- Not a first-party Cursor plugin. You host MCP/REST adapters. Confirm fields in Developer Center.
- Idempotent client_ref; never mint a new code on every “still waiting.”
- You bring the Android and operator credit. Platform pricing is devices plus send volume.
- Agent automation does not remove carrier fair-use or plan meters.
wait for otp agent flow android sms gateway is orchestration, not magic delivery. Sibling: wait-for-OTP failure modes. Agentic OTP: agentic OTP. Product: OTP. Live JSON: Developer Center.
Pricing: devices and send volume. App: Downloads.
send · wait · verify
1. send_otp
2. wait_for_otp (timeout)
3. verify — or stop
Send, wait, verify — with timeouts
Bound the wait. Escalate to support or a second factor. Do not treat “still waiting” as “send again.” DLR, webhooks.
An agent that resends OTP every ten seconds until the inbox pings is not resilient — it is a prepaid shredder.
Agent OTP flow table
| Step | Pass | Fail closed |
|---|---|---|
| send_otp | Accepted + client_ref | No mint on HTTP flake without key |
| wait_for_otp | Webhook/DLR or bounded poll | Infinite loop |
| verify | Hash match | Echo plaintext to the model |
| timeout | Human path | Auto-resend storm |
| device_id | Quiet OTP SIM | Promo device |
Waiting is not resending
send_sms tool design. Agentic OTP failures.
MCP tools stay thin
REST wrappers only. MCP. Messaging practices.
Next steps
Implement a hard timeout and a single client_ref. Spend 300 lifetime SMS proving the flow — then a funded OTP SIM.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- OTP and 2FA SMS on AndroidAuthentication flows
- SMS API documentationLive endpoint reference
- device and SMS volume pricingPlans and allowances
- Android SMS gateway product guideDefinition, product, and how to buy
