Anthropic Messages

POST /v1/messages accepts native Anthropic-style messages. Authenticate with x-api-key or Authorization: Bearer; anthropic-version is recognized.

from anthropic import Anthropic

client = Anthropic(base_url="http://127.0.0.1:8742", api_key=divine_token)
message = client.messages.create(
    model="provider/model",
    system="Be concise.",
    max_tokens=64,
    messages=[{"role": "user", "content": "Explain retries."}],
)
print(message.content[0].text)

Supported content includes text, supported image blocks, tool use, and tool result blocks. Request controls include max_tokens, temperature, top_p, top_k, stop_sequences, tools, and tool_choice.

Streaming

with client.messages.stream(
    model="provider/model",
    max_tokens=64,
    messages=[{"role": "user", "content": "Count to three."}],
) as stream:
    for text in stream.text_stream:
        print(text, end="")

Events follow the Anthropic message/content lifecycle and include usage when available.

Token counting

POST /v1/messages/count_tokens provides a practical local estimate when exact provider-native counting is unavailable. Treat an estimate conservatively for context-limit enforcement.