Fraud detection guides
Practical proxy API guides: response contracts, Python, JavaScript, free access, residential-proxy evaluation and request-path reliability.
Evidence, implementation questions and buying trade-offs for teams evaluating application protection.
Latest guides
What is a proxy detection API? Methods and outputs
Learn what a proxy detection API returns, how IP lookups differ from live session checks, and which evidence belongs in a signup or login decision.
Proxy detection API in Python: validation and errors
Build a Python IP lookup adapter with validation, bounded requests, explicit unknown results and secure credentials. Compare IP checks with live session collection.
Proxy detection in JavaScript: browser and backend
Keep proxy detection keys on the server, bind browser results to a protected action and handle webhooks, missing results and retries in a JavaScript application.
Free proxy detection APIs: limits and production cost
Compare free proxy API quotas and feature access. Understand daily limits, trial credits, paid security fields and the real cost of a protected event.
How to test residential proxy detection APIs fairly
Evaluate residential and mobile proxy detections with permitted labeled sessions, legitimate controls, repeated exits and honest precision and recall denominators.
Proxy and VPN API fields: flags, confidence and risk scores
Read proxy, VPN, hosting, relay and Tor fields without confusing them with fraud. Compare flags, provider attribution, confidence, risk and missing values.
Proxy API latency: caching, timeouts and rate limits
Plan proxy API deadlines, short-lived caches and burst handling. Separate IP lookup freshness from session results and design explicit timeout behavior.
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Practical research guides
Proxy APIs in login security: bots, tokens and account risk
Plan bot and account checks around a trusted proxy API result, with server verification, credential defenses, takeover review and useful fallback paths.
Device and browser evidence alongside a proxy API
Connect proxy API observations with browser and device evidence. Compare audio, canvas, visitor recognition, account identity and privacy requirements.
Proxy API engineering: trust, freshness and cost
Evaluate proxy API input trust, network categories, residential coverage, caching, location evidence and cost against the protected application action.
Use proxy evidence in trial, bonus and account eligibility
Use proxy and device evidence before issuing trial credits, bonuses and rewards. Review repeat accounts, sharing, eligibility records and safe retries.
Proxy APIs at checkout, refunds and content access
Place proxy evidence around checkout, refunds and paid access. Separate account risk, payment approval, dispute evidence and server-side entitlements.
Measure proxy API decisions against traffic and customer outcomes
Join proxy API logs to customer outcomes, advertising quality and affiliate revenue. Distinguish detection, applied actions, false declines and corrections.
Select proxy APIs and adjacent fraud services by contract
Compare proxy APIs and fraud platforms by outputs, billing units and operating duties, with specialist guidance for identity, payments and investigations.