Give your agent a real phone number, and an entire digital identity

Register accounts, get OTP codes, send texts, take calls all like a real human on the internet.

Stripe

Your 2FA code is 729 304. It expires in 10 minutes.

GitHub

Someone tried to sign in to your account from Chrome on macOS.

Google

Your OTP verification code is 482 913. It expires shortly.

Receive OTP and 2FA codes

Give each agent a dedicated line for signups, logins, OTP codes, and 2FA challenges across the services it needs to use, while VoIP numbers from Twilio get blocked.

Start verifying
+1 (617) 608-8932Message
Your OP agent confirmed the appointment for 2:30.
Great, can it send the address too?
Sent. It will follow up if anything changes.

Keep every text on the same line

Send outbound messages, receive replies, and keep the whole conversation tied to the number your agent already owns.

Try agent texting
+1 (415) 555-014200:22
This is the OP agent line. It can confirm details or route you to a person.

Add voice when chat is not enough

Take calls on the same trusted number when a workflow moves past SMS, without splitting identity across tools.

Enable agent calls
Feature comparison between OP, Twilio, and VoIP tools
FeatureOPTwilioVoIP tools
Real carrier numbersIncludedVoIPVoIP
OTP-friendlyYesOften blockedOften blocked
SMS and voiceYesYesVaries
Agent identity layerBuilt inCustom workLimited
Free to startYesUsage-basedUsually paid

Real numbers win where VoIP gets blocked.

OP gives agents a phone identity they can use across signups, messages, calls, and recovery flows.

Comparison based on common VoIP limitations and public product positioning.

A simple API for any agent.

Send a message, read inbound replies, or lease a dedicated number with the same API.

curl -X POST https://api.op.inc/v1/messages \  -H 'Authorization: Bearer op_live_…' \  -H 'Content-Type: application/json' \  -d '{"to": "+14155551234", "body": "hello from op"}'

FAQ