Third-Party API Risk Review
Technical audits for the APIs your payment stack quietly depends on
We review the third-party integrations behind payment flows and banking-adjacent products, mapping the dependencies that rarely get checked once the integration ships.
Why this review exists
Most integration reviews stop at "does it work"
A payment gateway connects, a KYC provider verifies, a card-issuing API responds correctly in staging. Everyone moves on. What tends to go unexamined is how that dependency behaves under version changes, silent deprecations, rotated credentials, or a vendor's own subprocessor changes. Cloud API Link exists to look at that layer specifically, on a schedule you choose, without disrupting how your team already ships.
Four areas we look at closely
Each audit engagement is scoped around your integrations, but these categories come up in nearly every review.
Dependency Mapping
We trace every third-party endpoint your application calls, directly or through an SDK, and document how each one fits into your payment or verification flow.
Version & Deprecation Tracking
Vendors change endpoints, retire SDK versions, and sunset sandbox environments. We check what your integration is actually running against, not what the documentation says.
Webhook & Callback Review
Signature verification, retry handling, and idempotency around incoming webhooks are reviewed for gaps that only surface under failure conditions.
Documentation Alignment
We compare vendor changelogs, internal runbooks, and actual configuration to see where written process and live behavior have quietly drifted apart.
Why it matters
Dependency risk is rarely visible in a code review
A pull request review checks whether your code calls an API correctly. It does not usually check whether the vendor's rate limits changed last quarter, whether a fallback path was ever tested against a real outage, or whether the sandbox credentials your staging environment relies on are due to expire. These things sit outside normal review cycles, which is exactly why they accumulate quietly.
Our audits are built to sit alongside your existing development process, not replace it. We produce a written findings report your engineering and compliance stakeholders can both read, organized by severity and by integration point rather than by technical jargon alone.
Learn how we approach this workHow our review approach has developed
The methodology behind each audit has been refined across several rounds of engagements with different integration patterns.
Initial framework for payment gateway reviews
Early engagements focused narrowly on payment gateway credential handling and webhook signature checks, building the first structured checklist.
Open banking and aggregation APIs added
As account aggregation and open banking connectors became common, the review scope expanded to include consent token lifecycles and scope creep.
Vendor lifecycle tracking introduced
A dedicated module for tracking vendor sunset notices and SDK version drift was added after repeated cases of quiet deprecations going unnoticed.
Documentation alignment reporting
Reports began cross-referencing internal runbooks against live configuration, surfacing gaps between what teams believed was configured and what actually ran.
Structured severity scoring across all findings
The current framework, described in full on our Methodology page, groups every finding into a consistent severity and remediation category.
Where these reviews tend to focus
A few of the integration categories that show up most often across engagements.
Curious what a systematic review would surface in your stack?
A short conversation is usually enough to tell whether a full audit makes sense for where your integrations currently stand.
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