# Pay API v11 overview

#### The Travelport+ Pay v11 APIs allow online travel agencies to request credit card authorizations, card and address validations, and reversals against a specific merchant vendor.

#### Guides

Pay overview information, summarizing each API and covering basic concepts.

Start with the [TripServices Pay APIs Guide](/pay-api-guide)

#### Pay API reference

References describing the Pay API resources and operations. Examples and object-level details including supported formats and values.

Check out the [Pay API reference](/apis/pay)

#### Downloads

Developer toolkits for developing your apps, plus other tools and support options.