# Trustap API > Trustap is an API for end-to-end transaction solution that seamlessly integrates payments, fulfillment, and support into your marketplace. Trustap is an escrow API service facilitating secure transactions. ## Intro Trustap API introduction. - [Get API keys](https://docs.trustap.com/docs/intro/auth.md): How to get started using the Trustap API. - [Hello Trustap](https://docs.trustap.com/docs/intro/hello.md): Try the Trustap API with a simple API call. - [Release notes](https://docs.trustap.com/docs/intro/release-notes.md): Latest API releases. - [Test your integration](https://docs.trustap.com/docs/intro/testing.md): Learn about testing the Trustap API. ## Concepts Trustap Concepts - [Authentication](https://docs.trustap.com/docs/concepts/auth-guide.md): Learn how Trustap uses authentication. - [Notifications](https://docs.trustap.com/docs/concepts/emails.md): Learn how Trustap notifies users and systems via emails and webhooks during a transaction. - [Merchant of Record](https://docs.trustap.com/docs/concepts/merchant_of_record.md): Guide on what a Merchant of Record is and what they are responsible for. - [Pricing](https://docs.trustap.com/docs/concepts/pricing.md): Guide on how to use the Trustap API to calculate the change for a Trustap transaction. - [Webhooks](https://docs.trustap.com/docs/concepts/webhooks.md): Guide on how to integrate and test Webhooks with the Trustap API. - [Terms](https://docs.trustap.com/docs/concepts/terms.md): Guide on Trustap API terms. ## Guides Trustap integration guides - [State](https://docs.trustap.com/docs/guides/state.md): Using the state parameter with the Trustap API. - [WooCommerce](https://docs.trustap.com/docs/guides/woocommerce.md): Learn how to use Trustap with WooCommerce. - [Charge configuration](https://docs.trustap.com/docs/guides/charge-config.md) - [DealerOn](https://docs.trustap.com/docs/guides/dealeron.md) - [Shopify](https://docs.trustap.com/docs/guides/shopify.md) - [Face-to-face submit a complaint](https://docs.trustap.com/docs/guides/transactions/face-to-face/face-to-face-complaint.md): Submit a complaint for a face-to-face transaction. - [Metadata](https://docs.trustap.com/docs/guides/transactions/metadata.md) - [Face-to-face transaction database changes](https://docs.trustap.com/docs/guides/transactions/face-to-face/face-to-face-database-changes.md): Guidelines on how to store Trustap information in your own database for a face-to-face transaction. - [Face-to-face create a full user](https://docs.trustap.com/docs/guides/transactions/face-to-face/face-to-face-create-full-user.md): Guide on how to create a full Trustap user in a face-to-face transaction. - [Face-to-face transaction flow](https://docs.trustap.com/docs/guides/transactions/face-to-face/face-to-face-int-path.md): Step by step guide showing a full face-to-face transaction flow. - [Face-to-face transaction introduction](https://docs.trustap.com/docs/guides/transactions/face-to-face/face-to-face-intro.md): Introduction to a face-to-face transaction flow. - [Face-to-face transaction lifecycle](https://docs.trustap.com/docs/guides/transactions/face-to-face/face-to-face-lifecycle.md): Guide to face-to-face transaction lifecycle showing how the transaction status changes during the life of the transaction. - [Face-to-face UI](https://docs.trustap.com/docs/guides/transactions/face-to-face/face-to-face-ui-flow.md): Face-to-face sample user interfaces. - [Online submit a complaint](https://docs.trustap.com/docs/guides/transactions/online/online-complaint.md): Submit a complaint for an online transaction. - [Online create a full user](https://docs.trustap.com/docs/guides/transactions/online/online-create-full-user.md): Guide on how to create a full Trustap user in an online transaction. - [Online transaction database changes](https://docs.trustap.com/docs/guides/transactions/online/online-database-changes.md): Guidelines on how to store Trustap information in your own database for an online transaction. - [Online transaction introduction](https://docs.trustap.com/docs/guides/transactions/online/online-intro.md): Introduction to an online transaction flow. - [Online transaction flow](https://docs.trustap.com/docs/guides/transactions/online/online-int-path.md): Step by step guide showing a full online transaction flow. - [Online transaction lifecycle](https://docs.trustap.com/docs/guides/transactions/online/online-lifecycle.md): Guide to online transaction lifecycle showing how the transaction status changes during the life of the transaction. - [Online integrated shipping](https://docs.trustap.com/docs/guides/transactions/online/online-shipping.md): Guide to enabling integrated shipping using the Trustap API. - [Online UI](https://docs.trustap.com/docs/guides/transactions/online/online-ui-flow.md): Online sample user interfaces. - [Trustap lite code example](https://docs.trustap.com/docs/guides/transactions/trustap-lite/listing-code-sample.md) - [Trustap lite transaction flow](https://docs.trustap.com/docs/guides/transactions/trustap-lite/listing-int-path.md) - [Trustap lite](https://docs.trustap.com/docs/guides/transactions/trustap-lite/listing-intro.md) ## API Reference Trustap API reference guide - [Trustap API](https://docs.trustap.com/apis/openapi.md)