Api referenceImages
upscaleImage (Google Vertex-compatible)
Authorization
bearerAuth AuthorizationBearer <token>
Authorization: Bearer <your RouteMux API key>.
Create keys at https://routemux.com/console/keys. New keys use the sk- prefix;
the legacy rmx_live_ prefix is still accepted.
The Anthropic SDK's x-api-key and the Google SDK's x-goog-api-key are accepted too.
Sending several key headers with different values returns 400 AMBIGUOUS_API_KEY.
In: header
Path Parameters
model*string
Model ID, e.g. anthropic/claude-sonnet-5. URL-encoded.
Request Body
application/json
TypeScript Definitions
Use the request body type in TypeScript.
Request and response bodies match the upstream provider's official format verbatim —
RouteMux passes them through untouched. See the provider's own docs for field definitions;
the gateway itself only reads model and stream.
Response Body
application/json
application/json
curl -X POST "https://example.com/vertex-ai/v1beta/models/openai/gpt-5.5:upscaleImage" \ -H "Content-Type: application/json" \ -d '{}'{ "model": "string", "stream": true}