Payment-API coverage
Transfers, payouts, refunds, and webhooks are mapped, replayed with real payloads, and exercised across the flows that actually move funds.
Prove a transfer can't move someone else's money
Trident pentests the endpoints behind every transaction — auth, IDOR, idempotency, and money-movement logic — and reproduces each exploit against your transfer and payout APIs before it can touch customer funds. The same run maps the cloud paths to cardholder data and hands back PCI-ready evidence.
Transfer authorizationLive verification
Attempted payout$48,620.00
SessionObject
accessLedger
accessLedger
Replay blocked before settlementCross-account authorization failed · evidence captured
Capabilities
Test the endpoints that move money
Auth, authorization, and transaction logic — probed like an attacker, with reproducible evidence for validated findings.
IDOR & broken access control
Cross-tenant object access is the bug that drains an account. Trident chains it the way an attacker would and proves the unauthorized transfer.
Money-movement business logic
Negative amounts, idempotency replays, and currency rounding are tested against live endpoints — abuse paths a scanner never reasons about.
Evidence for PCI DSS
Each finding maps to the PCI requirement it touches, so QSAs and partner banks get the reproducible proof an attestation needs.
Paths to cardholder data
Cloud attack-path mapping shows what could chain across AWS, GCP, and Snowflake to a store of cardholder or KYC data.
Fixes with a regression test
Every confirmed bug ships a draft PR or Terraform-IAM change bundled with the test that keeps the hole closed.
How it works
From a transfer endpoint to a proven fix
01
Map the money flows
Trident discovers the apps and APIs that move funds and the cloud stores that hold cardholder data.
02
Attack the transaction
Auth, IDOR, idempotency, and replay are probed across real transfer and payout paths.
03
Reproduce the exploit
A finding stays unconfirmed until the unauthorized transfer replays end to end with the exact request.
04
Open the fix
Confirmed findings hand engineers a draft PR or runbook with the proof and a regression test attached.
Outcomes
Trust your rails
Every finding arrives reproduced and mapped to a PCI requirement, so a payments bug never ships on faith.
Web + API
Authorized scope
Auth-focused
Money-movement flows
Evidence-led
Finding review
Retested
After remediation
Scope
Where money and account data can go wrong
Payment flows fail through logic far more often than through the cryptography protecting them.
What fintech testing prioritizes
In fintech the defining risk is rarely a memory-corruption bug; it is an authorization or logic flaw that lets money or account data move in a way the product never intended. Trident concentrates on payment and account APIs — whether a transfer can be initiated against an account the caller does not own, whether amounts and currencies can be manipulated in transit, and whether a request can be replayed for a second effect.
- Transfer and payment authorization
- Whether an authenticated caller can initiate, modify, or approve a movement of funds involving an account they do not own, including through indirect identifiers the interface never exposes.
- Amount and currency handling
- Negative amounts, rounding and precision boundaries, currency substitution, and fee or limit calculations that can be driven outside their intended range.
- Idempotency and replay
- Whether a captured request can be replayed for a second effect, and whether idempotency keys are actually enforced server-side rather than merely accepted and logged.
- Ledger and reconciliation state
- Sequences that leave balances, holds, refunds, or reversals in states the reconciliation process cannot resolve — including refunds exceeding the original charge.
- Cardholder data reachability
- Which cloud identities and services can reach stores holding account or cardholder data, including the analytics and backup copies that inherit access quietly.
Frequently asked
Questions teams ask before they start
Does this satisfy PCI DSS penetration testing requirements?
PCI DSS requires scoped internal and external penetration testing with segmentation validation, performed by a qualified party using an accepted methodology. Trident produces testing and evidence aligned to that structure, but scope adequacy and acceptance are determined by your QSA. Confirm the expectation before scoping.
Can you test against production payment rails?
Testing runs against sandbox or staging payment integrations by default. Payment logic can be exercised fully in those environments, and doing so avoids moving real funds — which is a category of mistake with consequences that no finding is worth.
How do you test business logic without a specification?
The intended authorization and transaction model is requested at scoping. Without it, testers cannot distinguish a deliberate product decision from a defect, and you receive both as findings — which is the most common reason fintech engagements produce noisy reports.
What about our banking partners’ security reviews?
Partner reviews typically ask for scope, methodology, findings, remediation, and retest evidence. That is the same artefact set produced here, though each partner sets its own bar and some require an independent assessor for the report itself.
Don't ship a payments bug on faith.
Watch a live Trident pentest reproduce an unauthorized transfer against your own APIs — then open the fix in one PR.