# Revtain

> Recover failed payments. No checkout changes. Works with your existing payment stack.

## Docs

- [Health Check](https://docs.revtain.com/api-reference/health/health-check.md): Returns the current health status of the Revtain API.
- [Predict Transaction Risk](https://docs.revtain.com/api-reference/predictive-risk-engine/predict-transaction-risk.md): Predicts the risk score for a transaction before executing it. Use this to pre-screen payments and decide whether to proceed, delay, or block.
- [Record Prediction Outcome](https://docs.revtain.com/api-reference/predictive-risk-engine/record-prediction-outcome.md): Records the actual outcome of a previously predicted transaction.
- [Execute Recovery](https://docs.revtain.com/api-reference/recovery-engine/execute-recovery.md): The core recovery endpoint. When a payment fails in your billing system, call this to trigger the intelligent recovery engine.
- [Generate Card Update Link](https://docs.revtain.com/api-reference/recovery-engine/generate-card-update-link.md): Generate a secure, time-limited URL that your customer can visit to update their payment method.
- [Get Recovery Status](https://docs.revtain.com/api-reference/recovery-engine/get-recovery-status.md): Poll the current status of a recovery attempt.
- [Log Organic Success (Pulse)](https://docs.revtain.com/api-reference/recovery-engine/log-organic-success-pulse.md): Logs an organic success — a transaction that succeeded on the first try without needing recovery.
- [Tokenize Card](https://docs.revtain.com/api-reference/recovery-engine/tokenize-card.md): Server-to-server card tokenization for ENGINE_ROOM clients with their own PCI Level 1 clearance.
- [Authentication](https://docs.revtain.com/authentication.md): Authenticate every API request with your Revtain API key.
- [Decline Codes Reference](https://docs.revtain.com/concepts/decline-codes.md): How Revtain handles each category of decline code.
- [Security & Compliance](https://docs.revtain.com/concepts/security.md): Encryption, PCI compliance, signing, and how Revtain handles card data.
- [API Integration](https://docs.revtain.com/guides/api-integration.md): Custom billing system or full API control. Recommended Fast Track flow with code examples.
- [Card Update Links](https://docs.revtain.com/guides/card-update-links.md): Generate secure, time-limited URLs for customers to update their payment method — branded with your business.
- [Zero-Code Connectors](https://docs.revtain.com/guides/connectors.md): Native integrations for Chargebee, Recurly, Stripe Billing, and Braintree. No code required.
- [Dunning Sequences](https://docs.revtain.com/guides/dunning.md): How Revtain's dunning works — webhook-driven, no customer-facing emails from Revtain.
- [Integration Checklist](https://docs.revtain.com/guides/integration-checklist.md): Everything your team needs to do before going live with Revtain.
- [Testing](https://docs.revtain.com/guides/testing.md): Test cards, simulated outcomes, and the simulateOutcome parameter for end-to-end testing.
- [Troubleshooting](https://docs.revtain.com/guides/troubleshooting.md): Common errors and how to fix them.
- [Webhooks](https://docs.revtain.com/guides/webhooks.md): Receive real-time notifications when recovery attempts complete. Verification, events, and retry behaviour.
- [Revtain API](https://docs.revtain.com/introduction.md): Recover failed payments. No checkout changes. Works with your existing payment stack.
- [Quickstart](https://docs.revtain.com/quickstart.md): Your first recovery call in under 60 seconds.

## OpenAPI Specs

- [openapi](https://docs.revtain.com/api-reference/openapi.yaml)