curl --location --globoff '{{BASE_URL}}/v1/messages' \
--header 'Authorization: {{YOUR_API_KEY}}' \
--header 'Content-Type: application/json' \
--data '{
"model": "claude-sonnet-4-5-20250929",
"messages": [
{
"role": "user",
"content": "Hello!"
}
]
}'{}