Grow your users by paying only for the ones who arrive.
Affiliate program software for SaaS and marketplaces. Decide what a signup or a paying subscriber is worth, prepay the budget, and let creators bring you customers while you ship.
Pay per signup or per subscriber
$0.50 for a verified free account. $4.00 when they first pay. $10.00 for your highest tier only. You set the rate and the monthly cap.
Keep paying while they stay
Pay the rate every month for up to twelve months, and it stops automatically the moment the subscription cancels.
Never overspend
Fund the budget up front. A commission is never accrued that your balance cannot cover, enforced inside the database transaction.
Three ways to connect, one afternoon of work.
One POST from your backend when a referred user signs up or pays. Idempotent, so retries are free.
POST /api/v1/conversions
Authorization: Bearer sk_live_…
{ "ref": "…",
"event": "subscription.paid",
"externalEventId": "evt_123" }Connect your Stripe account, put the ref in your Checkout metadata, and write nothing else. We read your payments and your cancellations — which is what keeps a twelve-month commission honest.
Point Claude or any MCP client at your program to read campaign performance, review applicants and report conversions without leaving the conversation.
Questions founders ask.
How do I track which affiliate brought a user?
Every affiliate link redirects through ShopSlash, which sets a signed ss_ref token as a first-party cookie and appends it to your destination URL. Capture that token at signup, store it against the user, and post it back to our Conversion API when they sign up or pay. If you use Stripe, you can skip the code entirely: put the ref in your Checkout or subscription metadata and we read your webhooks directly.
Can I pay a commission every month while a subscriber stays?
Yes. Set a campaign's recurring months to any value up to twelve and the affiliate earns the rate every month for that long. Accrual stops the moment the subscription cancels, which we learn from your Stripe cancellation webhook or a subscription.canceled event on the Conversion API.
How do I stop affiliate spend from running away?
Two limits, both enforced in the database rather than the UI. Each campaign has a monthly budget cap, and your whole program runs on a prepaid balance — a commission is never accrued that your funded balance cannot cover.
What does ShopSlash cost?
A monthly plan from $0 to $100 for the software, plus a 5% platform fee and card processing whenever you fund a campaign budget. The fees are charged on top of the budget, so the full budget reaches your affiliates. Affiliates are never charged.
Can I restrict a campaign to certain countries?
Yes. Set the eligible markets on a campaign and clicks from anywhere else are recorded but issue no referral token, so no commission can accrue from a market you did not want to pay for.
Do I need to build an affiliate dashboard?
No. Affiliates sign up on ShopSlash, browse your campaign, generate their own tagged links and see their clicks, conversions and earnings. You only build the conversion reporting.
Start free, upgrade when it works.
The free plan runs one signup campaign with up to ten affiliates — enough to prove the channel before you pay for it.