Signifyd is an ecommerce fraud prevention, chargeback protection, and revenue optimization platform headquartered in San Jose, California. Its Commerce Protection Platform applies machine learning, elastic linking, and a merchant consortium covering roughly 98% of US online shoppers to make real-time guarantee decisions on orders. Merchants integrate via the Checkout, Sale, Transaction, Decisions, Returns, Sales Tax, and Feedback APIs (v2 and v3) with synchronous responses and/or asynchronous webhooks, and Signifyd financially guarantees approved orders against fraudulent chargebacks.
URL: Visit APIs.json
Run: Capabilities Using Naftiko
- Fraud, Fraud Prevention, Chargebacks, Ecommerce, Payments, Risk, Machine Learning, Commerce Protection, Account Protection, Returns
- Created: 2026-05-25
- Modified: 2026-05-25
Submit checkout and sale events for real-time fraud and chargeback risk evaluation. Checkout flow supports pre-authorization screening; Sale flow handles post-authorization order submission. Returns a guarantee decision (ACCEPT / HOLD / REJECT) within hundreds of milliseconds.
Human URL: https://developer.signifyd.com/main/reference
Submit finalized order and payment transaction details after authorization so Signifyd can reconcile the pre-auth Checkout decision with the captured transaction and finalize the chargeback guarantee.
Human URL: https://developer.signifyd.com/main/reference
Programmatically retrieve guarantee decisions, case details, and policy results — checkpointAction, checkpointActionReason, matched policies, and the ML score — to drive capture, ship, cancel, or manual review.
Human URL: https://developer.signifyd.com/main/reference
Report observed user outcomes back to Signifyd to close the loop between real-time decisions and production reality. Dedicated endpoints cover Account Opening, Login, and Modification flows plus chargeback and fraud outcome reporting.
Human URL: https://developer.signifyd.com/main/docs/feedback-api-overview
Submit return events for evaluation by Signifyd's Return Insights and Return Abuse Prevention models. Powers the Instant Refunds product and helps identify abusive returners.
Human URL: https://developer.signifyd.com/main/reference
Nexus-aware US sales tax calculation, filing, and remittance across state and local jurisdictions.
Human URL: https://developer.signifyd.com/main/reference
Score non-purchase journeys — Account Opening, Login, and Modification — against account takeover, synthetic identity, and bonus abuse. Pairs with dedicated Feedback endpoints per checkpoint.
Human URL: https://developer.signifyd.com/main/reference
Receive asynchronous decision notifications via the ORDER_CHECKPOINT_ACTION_UPDATE topic, covering CHECKOUT, SALE, TRANSACTION, REROUTE, MERCHANT_REVIEW, and SIGNIFYD_REVIEW checkpoints. Each delivery is signed with an HMAC-SHA256 signature in the SIGNIFYD-SEC-HMAC-SHA256 header.
Human URL: https://developer.signifyd.com/main/docs/configuring-webhooks
- Portal — signifyd.com
- Portal — Developer Hub
- Documentation — Developer Docs
- Documentation — API Reference
- Documentation — v3.0 Reference
- Documentation — v2.0 Reference
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- SDK — PHP
- Integrations — Magento 2
- Integrations — Magento 1
- Integrations — Salesforce Commerce Cloud
- Documentation — API Blueprint repo
FN: Kin Lane
Email: info@apievangelist.com