Payments Stack Detector

Payments Stack Detector finds which payment provider a website uses, in bulk. Paste a list of online store URLs and get each store's PSPs, gateways, wallets and buy-now-pay-later options, plus its e-commerce platform. It's built for PSP lead lists: finding merchants that use a given provider (for example, every store in your list that runs Stripe or Klarna) and competitor research for payments sales teams.

Best for: PSP, acquirer and payment gateway sales teams, ISOs and agents prospecting merchants, and anyone sizing up a competitor's merchant base or migration targets.

Build a PSP lead list: find merchants using a given provider

1. Collect a list of store URLs (from your CRM, a directory, a trade show list or a market you want to enter).
2. Run them through Payments Stack Detector.
3. Filter the results by providers.provider (for example Adyen, Stripe, Klarna or Worldpay) to get the merchants on that provider, or by platform (for example Shopify or WooCommerce).
4. Export to CSV or Excel for your CRM, or schedule the run to re-check the list regularly and spot changes.

Competitor research for payments sales teams

• Competitive displacement: list the merchants in your target segment that use a competitor's gateway.
• Wallet and BNPL coverage: see which stores already offer Apple Pay, Google Pay, Klarna or Clearpay and which don't (an upsell opening).
• Platform targeting: find Shopify, WooCommerce or Magento stores for platform-specific payment offers.
• Account research: check a prospect's current setup before a sales call.

What does Payments Stack Detector do?

For each URL it returns the payment service providers, gateways, wallets and BNPL it can see in public HTML, script tags and response headers (homepage plus /cart and /checkout). It detects about 30 providers, including Stripe, Adyen, Checkout.com, PayPal/Braintree, Klarna, Clearpay/Afterpay, Shopify Payments, Square, Worldpay, Opayo, GoCardless, Mollie, Amazon Pay, Apple Pay, Google Pay, Trustly, Revolut, SumUp, Laybuy, Zip, Affirm and Paddle, plus platforms (Shopify, WooCommerce, Magento, BigCommerce, Wix, Squarespace). Each detection includes the evidence found and a confidence level.

How to find which payment provider a website uses

1. Add store URLs to Store URLs (startUrls).
2. Leave Also check /cart and /checkout on for better coverage.
3. Click Start, then download the results as JSON, CSV or Excel.

Input

startUrls (list), crawlExtraPages (bool), maxConcurrency.

Output (per site)

url, platform, providers[{provider, category, evidence[], confidence}], pagesChecked, error

Limits

Only static HTML is fetched (no JS execution, no checkout submission). Providers loaded only after login/checkout steps may be missed. Respect site terms; low request rate.

Pricing (pay-per-event)

• site-analysed: $0.004 per site ($4 / 1,000).
• Example: 10,000 sites cost $40.00.

Example input

{
  "startUrls": [
    "https://www.allbirds.com"
  ],
  "crawlExtraPages": true
}

Example output

Values below are illustrative.

{
  "url": "https://www.allbirds.com",
  "platform": "Shopify",
  "providers": [
    {
      "provider": "Shopify Payments",
      "category": "psp",
      "evidence": [
        "shopify-payment-button"
      ],
      "confidence": "high"
    },
    {
      "provider": "PayPal",
      "category": "wallet",
      "evidence": [
        "paypal-button"
      ],
      "confidence": "medium"
    }
  ],
  "pagesChecked": [
    "https://www.allbirds.com/"
  ],
  "error": null
}

Use it via API, schedules and integrations

Run it in Apify Console, or call it from your own code with the Apify API or the Python and JavaScript clients. Save an input as a task and add a schedule to run it regularly, and send results to Slack, email, webhooks, Zapier, Make or n8n with Apify integrations. AI agents can find and run it through the Apify MCP server.

from apify_client import ApifyClient

client = ApifyClient("YOUR_APIFY_TOKEN")
run = client.actor("sterlingverify/payments-stack-detector").call(run_input={"startUrls": ["https://www.allbirds.com"]})
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item)

FAQ

Which payment providers can it detect?

About 30, including Stripe, Adyen, Checkout.com, PayPal/Braintree, Klarna, Clearpay/Afterpay, Shopify Payments, Square, Worldpay, Opayo, GoCardless, Mollie, Amazon Pay, Apple Pay and Google Pay, plus platforms such as Shopify, WooCommerce and Magento.

Can I find all merchants using Stripe (or Adyen, Klarna...)?

It checks the URLs you give it; it doesn't discover stores on its own. Supply a list of stores in your target market, then filter the output by provider to build your lead list.

Does it run JavaScript or place test orders?

No. It reads only publicly served HTML, script tags and headers, so providers that appear only after login or later checkout steps can be missed.

Disclaimer

Detection is heuristic, based only on publicly served page code. Use responsibly and in line with target sites' terms.

Platform usage is included in the per-event price; you pay only for results.

Related sterlingVerify tools

Part of the sterlingVerify UK payments, KYB and data toolkit on Apify Store:

• Merchant Website Compliance Checker for Onboarding: onboarding review of a merchant's website
• PCI Readiness Scanner: passive checkout security check with a likely SAQ type
• MCC Checker: check a merchant's MCC against its website or description
• PSP Status Monitor: outage alerts from payment provider status pages
• UK Company Check: Companies House, VAT and UK sanctions KYB check in one call