Both OTAs say that they dont give access to their apis at the time
booking: At this point in time, we are not granting access to API.
airbnb: At this time, we are not accepting new access requests for our API. Our global team of partner managers will reach out to prospective partners based on the supply opportunity your business represents, strength of your technology, and ability to support our shared customers.
And has anyone worked with otagateway.com
So :