Claude Messages API

Use a Claude-style messages format when your client or workflow expects Anthropic-compatible payloads.

Endpoint

POST https://123api.co/v1/messages

Example

curl --request POST \
  --url https://123api.co/v1/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "claude-sonnet",
    "max_tokens": 1024,
    "messages": [
      {
        "role": "user",
        "content": "Summarize the following article in three bullet points."
      }
    ]
  }'

Notes

• Suitable for clients already built around Claude Messages semantics
• Multimodal inputs depend on the chosen model and your current account capability
• Use the general chat API if you want the most common OpenAI-style request shape