You mean a JSON to XML converter for inbound traffic? Potentially, we don't get many requests for XML support except from banks
Not sure what you mean with this? Tyk has a pretty robust access control mechanism
There is OAuth2.0 support in Tyk though not all flows are handled. You can do transparent third party OAuth SSO with Tyk Identity Broker
This is also supported as part of our OAuth server
Developer portal supports API Blueprint and Open API (Swagger)
We don't support billing yet, but there is an API Catalogue on the portal, and you can specify a hand-off URL to take the key request before it is approved and hand off to a third-party app, the third party app can then handle the transaction and approve the key using the API to provisde the dev with a token post-purchase.
This is easy to achieve using API Sharding within a DC using tags, if you have isolated data centres / zones / clusters that you need to handle multiple environments in, you will need Enterprise SLA and our MDC Bridge
RAML: no, Blueprint: Yes