Update api-specifications.md

docs/api-specifications.md

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 # API Specifications
 
-There are (at time of writing) three main Radix APIs:
-
-* [Gateway API](https://redocly.github.io/redoc/?url=https://raw.githubusercontent.com/radixdlt/radixdlt-network-gateway/main/gateway-api-schema.yaml) - The main public facing API, exposed by the Network Gateway
-* [Core API](https://redocly.github.io/redoc/?url=https://raw.githubusercontent.com/radixdlt/radixdlt/main/radixdlt-core/radixdlt/src/main/java/com/radixdlt/api/core/api.yaml) - An API exposed by radixdlt full nodes, intended to be exposed on private networks
-* [System API](https://redocly.github.io/redoc/?url=https://raw.githubusercontent.com/radixdlt/radixdlt/main/radixdlt-core/radixdlt/src/main/java/com/radixdlt/api/system/api.yaml) - An API exposed privately by radixdlt nodes to get information about the node health/status.
-
-The links above link to the ReDocly docs, reading the schemas on the `main` branches of each repo. As such, they may include features that are not yet on the latest release.
+The documentation site covers details about the various [Network APIs](https://docs.radixdlt.com/docs/network-apis) exposed in the Radix stack.
 
 ## Gateway API
 
-As the Gateway API is exposed by the Gateway Service, the Gateway API specification source-of-truth lives in the [Open API Schema in the Network Gateway repository](../src/RadixDlt.NetworkGateway.GatewayApi/gateway-api-schema.yaml).
-
-The Open API specification should be kept up to date with the interface that the Gateway API service exposes.
-
-## Core and System APIs
+The current [Gateway API schema](https://radix-babylon-gateway-api.redoc.ly/) of the foundation Gateway is available on Redocly.
 
-The source of truth for the Core and System APIs lives on the full node - and the specs on the `main` branch are here: [Core Open API Spec](https://github.com/radixdlt/radixdlt/blob/main/radixdlt-core/radixdlt/src/main/java/com/radixdlt/api/core/api.yaml) | [System Open API Spec](https://github.com/radixdlt/radixdlt/blob/main/radixdlt-core/radixdlt/src/main/java/com/radixdlt/api/system/api.yaml).
+The Gateway API schema source-of-truth lives in this repository as an Open API definition in [gateway-api-schema.yaml](../src/RadixDlt.NetworkGateway.GatewayApi/gateway-api-schema.yaml).
 
 ## Model and Client Generation