Resource library
Guides for teams that move real payment volume
Payment orchestration is a craft. These guides, API docs, and playbooks show how to lift approval rates, route smarter, and absorb EU compliance. All written for high-volume merchant teams. No fluff, no sales gate.
Featured guides
Practical playbooks, one topic at a time
Each guide tackles one real payment problem end to end. Pick the one that matches your traffic and read it in a single sitting.
- Approval rates
Recover declined payments in real time
How intelligent cascading re-attempts soft declines across acquirers. Win back revenue before checkout sees a failure.
Read the routing guide - SaaS
Recover failed rebills before they churn
A routing strategy for subscription and SaaS operators. Cascading and account-updater logic clear renewals that would otherwise become MRR loss.
See the SaaS playbook - Compliance
A PSD3 readiness checklist
What cross-border merchants should prepare now. Map SCA, 3DS2, and PCI scope before the next rule cycle lands.
Open the checklist - Risk
Cut chargebacks with 3DS2 and dynamic rules
Tune authentication so good payments stay frictionless. Apply risk rules only where they earn their keep.
Explore risk controls - Operations
Automate multi-acquirer reconciliation
Stop matching settlement files by hand. One ledger reconciles every acquirer, fee, and payout in one place.
See reconciliation - Growth
Expand into new EU markets without a rebuild
Add local acquirers and payment methods through one API. Enter new markets without renegotiating your stack.
Browse integrations
Developer docs
One API. Every acquirer.
The reference covers auth, routing policy, webhooks, and reconciliation endpoints. Send one request. We pick the route most likely to clear and return a clean result. Your checkout code stays the same.
- Auth
- scoped API keys, per environment
- Events
- signed webhooks for every state change
- Format
- JSON · REST · idempotent
Where to start
A path through the library
New to orchestration? Follow these three steps in order. Each links to a deeper page once you want the full detail.
- 01
Start with the platform
See how one API sits above your acquirers. Learn what orchestration handles between authorisation and settlement.
Platform overview - 02
Pick the playbook for your sector
E-commerce, SaaS, travel, and marketplaces each route differently. Read the guide that fits your traffic.
By industry - 03
Plan your compliance scope
Map PCI DSS, PSD2, and SCA against your setup. Offload the parts that belong in infrastructure.
Compliance
Questions
Before you dive in
Who are these resources written for?
CFOs, CTOs, and heads of payments at high-volume merchants. We keep the depth technical and the language plain.
Do I need to switch my current PSPs?
No. topropay is a pure orchestration layer. You keep your acquirer and PSP relationships in full.
How often are guides updated?
We revise them as EU rules and payment methods change. Each guide reflects current PSD2 and 3DS2 practice.
Can I talk to a person instead?
Yes. Book a discovery call and a payments engineer will walk through your stack. No demo wall first.
Talk to us
Ready to route smarter?
Bring your stack. A payments engineer will map the gaps and show the approval-rate upside. One call. No demo wall.