Model IDs and options in examples are illustrative. Select an available model from GET /v1/models and check its capabilities and current prices.

POST /v1/messages

Anthropic Messages API format. Translated internally to chat completions.

Parameter	Type	Default	Description
model	string	required	Model ID
messages	array	required	Array of {role, content} objects
max_tokens	integer	required	Maximum tokens to generate
system	string	—	System prompt
stream	boolean	false	Enable SSE streaming

Example

curl -X POST https://relayon.app/v1/messages \
  -H "Authorization: Bearer ro_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "alims-intl/qwen-plus",
    "max_tokens": 1024,
    "system": "You are a coding assistant.",
    "messages": [
      {"role": "user", "content": "Write fizzbuzz in Python."}
    ]
  }'