Online Payments arenaBuyer checklist
Every requirement we judge online payments products against, as a ready-to-send RFP checklist — with each item's priority, why it matters, and how the top-ranked products score on it today.
54 requirements · 12 themes · verdicts for 10 products · updated 2026-09-15 · priorities mirror the story weights our scoring uses (methodology)
Show the markdown export
# Online Payments — buyer checklist (RFP) Derived from ProductArena's evidence-graded user-story taxonomy for Online Payments: 54 judged requirements. Priorities mirror story weights (3 = must-have, 2 = should-have, 1 = nice-to-have). ## Agenticness - [ ] **[must-have]** Plug MCP servers into this product so it can use their tools - [ ] **[must-have]** Connect an agent via an official MCP server - [ ] **[must-have]** Drive the product through a documented public API - [ ] **[must-have]** Delegate tasks to a built-in AI assistant inside the product - [ ] **[should-have]** Point an agent at llms.txt or agent-oriented docs - [ ] **[should-have]** Run the product headlessly / in CI for automation - [ ] **[should-have]** Use an official CLI - [ ] **[should-have]** Issue scoped/least-privilege API credentials for an agent - [ ] **[should-have]** Build against official SDKs - [ ] **[should-have]** Subscribe to events via webhooks - [ ] **[should-have]** Get AI-generated insights and suggestions from my data inside the product - [ ] **[should-have]** Set up automations that run autonomously in the background - [ ] **[should-have]** Operate the product with natural-language commands - [ ] **[should-have]** Explore an interactive API reference with runnable examples - [ ] **[should-have]** Download a machine-readable API spec (OpenAPI or equivalent) - [ ] **[should-have]** Rely on versioned APIs with a documented deprecation policy - [ ] **[nice-to-have]** Test against a sandbox environment without touching production data ## Automation depth - [ ] **[must-have]** Define rules that trigger actions automatically on events - [ ] **[should-have]** Perform bulk operations across many items at once - [ ] **[should-have]** Schedule recurring jobs or workflows - [ ] **[nice-to-have]** Version, review, and roll back my automations ## Billing invoicing - [ ] **[must-have]** Have an agent monitor failed payments via API and webhooks and drive retries and dunning outreach - [ ] **[must-have]** Have an agent provision a new product, price, and payment link via the API in a single session - [ ] **[must-have]** Set up recurring subscription billing with plans, trials, upgrades, and proration - [ ] **[should-have]** Send hosted invoices with online payment and automatic reminders - [ ] **[should-have]** Automatically retry failed subscription payments with smart dunning and recovery emails ## Checkout acceptance - [ ] **[must-have]** Accept an online card payment within a day of signing up - [ ] **[must-have]** Embed customizable payment components directly in my own site or app instead of redirecting to a hosted page - [ ] **[must-have]** Redirect customers to a vendor-hosted, conversion-optimized checkout page without building my own payment UI - [ ] **[should-have]** Create a shareable payment link from the dashboard with no code and start selling immediately - [ ] **[should-have]** Offer digital wallets and local payment methods (Apple Pay, Google Pay, bank redirects, BNPL) from the same integration ## Compliance security - [ ] **[should-have]** Keep my systems out of most of PCI DSS scope because card data is tokenized and never touches my servers ## Dev experience - [ ] **[must-have]** Rely on signed webhook deliveries with automatic retries, event logs, and replay to keep my system consistent with payment state - [ ] **[must-have]** Build and test the entire payment flow in a sandbox or test mode that mirrors production, with test cards for every scenario including declines and disputes - [ ] **[should-have]** Safely retry any API request using idempotency keys so network failures never create duplicate charges - [ ] **[should-have]** Integrate a working payment flow from the docs alone in under a day, with copy-paste examples in my language ## Disputes fraud - [ ] **[must-have]** Have an agent handle a dispute end-to-end, retrieving it, assembling evidence, and submitting the response via the API - [ ] **[must-have]** Respond to a chargeback with structured evidence and track the dispute lifecycle to resolution - [ ] **[must-have]** Screen transactions with machine-learning fraud scores and write custom block, review, and allow rules - [ ] **[must-have]** Issue full or partial refunds from both the dashboard and the API ## Global currency tax - [ ] **[must-have]** Calculate and collect the correct sales tax, VAT, or GST on every transaction automatically - [ ] **[should-have]** Charge customers in their local currencies and settle to my bank in mine with transparent FX handling ## Openness - [ ] **[must-have]** Export all of my data in open formats and leave - [ ] **[must-have]** Self-host the core product - [ ] **[should-have]** Do everything through the API that I can do in the UI - [ ] **[should-have]** Read the product's source under an open license ## Payouts reconciliation - [ ] **[must-have]** Have an agent pull payout and balance-transaction data via the API and reconcile each bank deposit to its underlying charges - [ ] **[must-have]** Reconcile settlements to bank deposits with itemized reports covering fees, refunds, and chargebacks - [ ] **[should-have]** Control the payout schedule and see exactly which charges, fees, and refunds make up each payout ## Platform marketplace - [ ] **[should-have]** Build a marketplace or platform that onboards sellers, splits payments between parties, and pays out to each seller ## Privacy posture - [ ] **[must-have]** Prevent my data from being used to train AI models - [ ] **[should-have]** Choose where my data is stored (region/residency) - [ ] **[should-have]** Control data retention and deletion - [ ] **[should-have]** Opt out of telemetry and usage tracking --- Source: https://ultrametric.ai/productarena/arena/payments (evidence-graded verdicts for 10 products) · methodology: https://ultrametric.ai/productarena/methodology
Chips show the top 5 ranked products' current verdict on each requirement — ✓ full · ~ partial · ! disputed · — none · n/a not applicable.
Agenticness — how well agents can access and operate the productAgenticness· 17 items
How well agents can access and operate the product
Automation depth — how much of the product can run unattendedAutomation depth· 4 items
How much of the product can run unattended
Billing invoicing — stories about billing invoicing in this arenaBilling invoicing· 5 items
Stories about billing invoicing in this arena
Checkout acceptance — stories about checkout acceptance in this arenaCheckout acceptance· 5 items
Stories about checkout acceptance in this arena
Compliance security — stories about compliance security in this arenaCompliance security· 1 item
Stories about compliance security in this arena
Dev experience — day-to-day developer experience — setup friction, docs, debugging, iteration speedDev experience· 4 items
Day-to-day developer experience — setup friction, docs, debugging, iteration speed
Disputes fraud — stories about disputes fraud in this arenaDisputes fraud· 4 items
Stories about disputes fraud in this arena
Global currency tax — stories about global currency tax in this arenaGlobal currency tax· 2 items
Stories about global currency tax in this arena
Openness — open source, data portability, and self-hosting storiesOpenness· 4 items
Open source, data portability, and self-hosting stories
Payouts reconciliation — stories about payouts reconciliation in this arenaPayouts reconciliation· 3 items
Stories about payouts reconciliation in this arena
Platform marketplace — stories about platform marketplace in this arenaPlatform marketplace· 1 item
Stories about platform marketplace in this arena
Privacy posture — data-handling and privacy storiesPrivacy posture· 4 items
Data-handling and privacy stories
Full evidence behind every verdict lives on the arena page and each product page — chips above deep-link straight to the judged story.