Your storefront or existing lifecycle tool supplies the cart event and eligibility decision. Blocx delivers the messages that your integration submits.
Who creates the checkout link?
Your store generates the destination and enforces access to the correct cart. Recheck its validity before sending rather than using a generic or stale link.
How do we stop reminders after a purchase?
Your application should check current order and cart state before each send and cancel its pending follow-ups when checkout completes. This is not a native cart sequence promised by the messaging platform.
Can we use a phone number captured at checkout?
Only where the intended communication is permitted by applicable consent, carrier, and marketing rules. Capturing a number is not itself blanket permission to send promotional reminders.
Make the reminder relevant before you make it automatic.
Start with a valid basket destination, a clear eligibility rule, and a reliable stop condition. Then connect the permitted message.
Blocx is the programmable messaging product from OtterBlocx, LLC, headquartered in Cheyenne, Wyoming, United States.
Channels
Live today: SMS, MMS, RCS, Email, Telegram.
Blocx also offers separate Voice services: VoIP, voicemail, call routing, 2FA via AI caller, and a voice dialer. These are not channels on the messaging or Verify API.
Plans
Starter — self-serve, 14-day free trial, then $49/month credited toward usage. SMS $0.0079/segment, email $0.001/email (1 sending domain), 1 API key. No MMS, RCS, Telegram, SHAFT or restricted verticals. Trial includes dashboard and sandbox access; sends only to your own verified number, with a trial prefix and no 10DLC registration. Add a card to start the paid plan and message customers; on day 14 without a card, the account locks.
Scale — $1,000/month minimum platform spend (starts on day 31; no minimum for the first 30 days), on an annual contract. Every channel and route type at the published rate card — all rates listed on this site are Scale rates. Signup starts with a call. Required tier for SHAFT and other restricted verticals.
Volume — custom volume-based pricing negotiated on your traffic profile. Contact sales.
Published rate card (+ carrier passthrough on SMS/MMS)
SMS: 10DLC $0.0045, toll-free $0.0055, short code $0.007.
MMS: 10DLC $0.0135, toll-free $0.016, short code $0.018.