Fintech API Silent Failure Scanner

YOUR API
HAS SILENT
FAILURES.

Paste any payment endpoint. We'll probe it and return a real reliability score plus the 3 failure patterns most likely to cause incidents at scale. 90 seconds. Free. No pitch.

01Retry double-count
02Partial amount mismatch
03Async callback gap
04Concurrent race condition
05Timeout no fallback
06Refund ledger imbalance
07Webhook signature bypass
OR
Continue with Google

No credit card. No demo call. Enter your email, paste an endpoint.
We send a read-only probe — no payment data, no auth credentials required.

you@company.com

PASTE AN
ENDPOINT

We'll send a lightweight probe and analyse the response + endpoint structure

›

Try: payments/charge · webhooks/notify · refunds/process

WHAT THE SCAN DOES
◈Sends a real OPTIONS/GET probe to your endpoint
◈Checks response codes, headers, and CORS config
◈Detects info-leaking headers (X-Powered-By, Server)
◈Flags wildcard CORS on payment routes
◈Analyses path structure for endpoint-type failure patterns
⚠ Read-only probe. No payment data sent. No auth credentials required.
SCANNING
TARGET: —
vellix-scanner v2.4.1
INITIALISING

3 FAILURE
VECTORS FOUND

—
/ 100
RELIABILITY
SCORE
DETECTED FAILURE PATTERNS
WANT THE FULL REPORT?

See all 7 patterns checked, line-by-line fix recommendations, and estimated revenue at risk.

BOOK 15-MIN CALL
TRY VELLIX TEST GEN

Generate prevention tests for each failure pattern. Auto-fix before it ships.

GENERATE TESTS FREE
HOW THIS SCAN WORKS We send a read-only OPTIONS or GET request to your endpoint and analyse: response codes, security headers, CORS configuration, and response timing. We also cross-reference your endpoint's path structure against our library of 7 payment failure patterns — the same ones that cause real incidents in fintech systems. No payment data is sent. No auth credentials required. Findings marked LIVE DETECTED came from the probe response. Findings marked PATTERN are structural inferences based on endpoint type.