Guest WiFi for EPOS and POS resellers: sell it with the till

When four people pay on one card, the till records one transaction and at most one name, while all four can pass through the guest WiFi sign-in page. A dealer who already has a monthly support contract with the venue can put guest WiFi on the same invoice.

Why guest WiFi pairs with a till

The till knows what was spent and the WiFi knows who walked in. On CaptiFi, guests answer the marketing question separately from getting online, and those who say no still get on. Put the resulting guest list next to the till data and the venue can see which named guests spend the most and which have stopped coming in, something a dealer can show the owner at renewal.

What the Square and SumUp connections match

Square connects natively and matches orders to WiFi guests. SumUp connects one way, through Zapier. Both need the venue on Growth or above.

Square POS

The Square connection runs both ways. Every guest who opts in to marketing is created in the venue's Square Customer Directory, in a group called CaptiFi WiFi Guests, and with Square Loyalty enrolment on, a guest who gives a mobile number and accepts texts is enrolled under it. Orders sync every 15 minutes and match through the customer record attached to the sale at the till, or the email on the order. Order access is read-only: CaptiFi never takes payments or changes prices or orders in Square, and the only things it adds are customer profiles, the CaptiFi WiFi Guests group and, if switched on, Loyalty enrolments (see the Square POS integration page).

ResumUp

There is no native CaptiFi to SumUp connector. A Webhooks by Zapier Catch Hook passes each opted-in guest (email, name, venue, visit date and consent) to the venue's email tool or CRM. SumUp sales are not read back, and the venue needs its own Zapier account (limits on the SumUp page).

At CaptiFi's public prices, Essentials is from $69 a month and Growth is $129 a month.

Connecting a till you sell yourself

Dealers who write till software have two documented APIs. With the Rewards till API (app.captifi.io/api/v1/rewards-pos) a till can check a reward code against the bill, redeem it once with a reference for the receipt, reverse that sale within 30 minutes, find a member and award points. Each terminal has its own key and a limit of 120 requests a minute, amounts travel as whole pence or cents, and every redeem carries an Idempotency-Key, so a till retrying after a dropped connection never redeems twice. The Loyalty and Rewards page lists the endpoints.

WiFi vouchers have two POS endpoints of their own, authenticated with a per-venue key: one creates up to 50 codes in a call, each keeping a guest online for the hours you set, and the other checks a code without using it. Put the venue in voucher mode and the till can print a WiFi code on every receipt.

Keeping guests away from card terminals

Guest WiFi belongs on its own SSID and VLAN with client isolation, with no route to the tills, card terminals or office machines, which is CaptiFi's standing advice.

The PCI Security Standards Council's information supplement, Guidance for PCI DSS Scoping and Network Segmentation (December 2016), says isolating the cardholder data environment (CDE) "is not a PCI DSS requirement", then strongly recommends it as a method that may reduce the scope and cost of an assessment. Without adequate segmentation, "the entire network is in scope". A device on the same subnet or VLAN as systems that store, process or transmit cardholder data counts as a CDE system, so a guest phone on the till VLAN is in scope by that test. And "the existence of separate network segments alone does not automatically create PCI DSS segmentation": the separation needs controls such as firewall and router rules that stop traffic passing between out-of-scope networks and the CDE.

Scoping is the merchant's decision, and the supplement (written against PCI DSS v3.2) sends merchants to their acquirer for compliance programmes, so check with them before calling a network compliant.

CaptiFi never needs the guest network to reach a till: the Square connection runs between the cloud platforms, and on existing access points CaptiFi is the external portal on the guest SSID only. Plug the CaptiFi device into a port on a VLAN of its own with internet access; it needs outbound HTTPS (TCP 443) and WireGuard (UDP 51820), plus DNS and NTP.

Selling guest WiFi on the till invoice

Reselling fits a dealer that already bills the venue monthly. You buy CaptiFi at wholesale in your account currency, set your own retail price and put guest WiFi on the same invoice as the till. Sold at CaptiFi's public price, your margin is more than a third of that price, and first-line support is yours, with CaptiFi as second line. If you would rather not take the calls, refer the venue instead and earn 20% of every payment it makes to CaptiFi for the client's lifetime ($25.80 a month on Growth). White label adds your brand at the same wholesale rates plus a minimum monthly commitment, though clients still use CaptiFi's dashboard sign-in page at my.captifi.io (the white-label page lists what is branded). The hub guide to guest WiFi for MSPs and resellers compares the three, and the rate card is on the MSP programme page.

As a reseller, client tickets raised in the dashboard come to your support address and a morning digest flags client venues that need attention. Where a venue has no suitable access points, the CaptiFi device (a WiFi 5 access point) plugs into its router by Ethernet. It comes with every plan for a refundable deposit when a venue signs up directly; resellers order it from the client's page and it is billed through the partner agreement.

Where a POS dealer starts

Start with your existing client list.

1. Sort your venues by till: Square sites can match spend on Growth, SumUp sites get the Zapier route, and other tills can use the voucher and Rewards APIs.
2. On your next site visit, check that guest WiFi sits on its own SSID and VLAN, away from the till and card terminals.
3. Decide whether you will refer or resell, then apply to the CaptiFi partner programme.

Sources: PCI Security Standards Council, Information Supplement: Guidance for PCI DSS Scoping and Network Segmentation (December 2016); CaptiFi's partner programme pages and customer documentation, October 2026. Square, SumUp, Zapier and the other product names here are trade marks of their owners; CaptiFi is not affiliated with or endorsed by them.