Payments Stack Detector - Tech Stack for PSPs

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)

Use in Clay, Zapier, Make, n8n, Pipedream, Power Automate or Activepieces

All of them connect to Apify through their official Apify integrations, using your own Apify account: an API token from Apify Console > Settings > API & Integrations, or Apify sign-in for Power Automate. Runs bill to your Apify account at this Actor's pay-per-event price.

• Clay: save this Actor's input as an Apify task and copy it as JSON. In your Clay table, add the Run Apify Actor enrichment, choose it and paste the JSON into Input Data, mapping Clay columns into the fields. To pull a finished run into a new table, use the Import data from Apify Actor source.
• Zapier: use the Apify Run Actor action, or the Finished Actor run trigger followed by Fetch dataset items. Synchronous runs in Zapier stop after 30 seconds, so use the trigger for big batches.
• Make: add the Apify Run an Actor module with Run synchronously set to Yes, then Get Dataset Items with the run's dataset ID. For longer runs, use the Watch Actor Runs trigger.
• n8n: install the Apify node (@apify/n8n-nodes-apify, or search "Apify" on n8n Cloud) and use Run an Actor and get dataset.
• Pipedream: add the Apify app's Run Actor action, or Run Task Synchronously on one of this Actor's public example tasks (or your own saved task) to get the dataset items back in one step. For big batches, start from the New Finished Actor Run or New Finished Task Run trigger, then Get Dataset Items.
• Power Automate: add the Apify connector (a premium connector, currently in preview) and sign in with your Apify account. Use Run Actor with Enter custom value set to sterlingverify/payments-stack-detector and paste the input as JSON, then Get dataset items with the run's default dataset ID. For big batches, start the flow from the Actor run finished trigger instead.
• Activepieces: add the Apify piece and use Run Actor, or Run Task on one of this Actor's public example tasks (or your own saved task), then Get Dataset Items. For scheduled or big batches, use the Watch Actor Runs or Watch Task Runs trigger.
• Google Drive / Sheets: add Apify's Upload results to GDrive integration to a scheduled task to drop each run's CSV or XLSX into your team's Drive, or chain the Google Sheets Import & Export actor to append rows to a sheet.
• Slack alerts: add Apify's Slack integration to a scheduled task to post each run's results to your team channel, or start a check from Slack with /apify call and your task ID.
• Any HTTP tool or script: send one request and get the results back as JSON. Runs must finish within 5 minutes.

curl -X POST "https://api.apify.com/v2/acts/sterlingverify~payments-stack-detector/run-sync-get-dataset-items" \
  -H "Authorization: Bearer YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d @input.json

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