Anthropic

Point the Anthropic SDK at the proxy. Streaming (text/event-stream) is passed through with per-chunk flush.

Proxy URL

http://127.0.0.1:7878/anthropic

Python

export ANTHROPIC_API_KEY="sk-ant-..."
export ANTHROPIC_BASE_URL="http://127.0.0.1:7878/anthropic"

from anthropic import Anthropic

client = Anthropic(base_url="http://127.0.0.1:7878/anthropic")
msg = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=512,
    messages=[{"role": "user", "content": "Hello"}],
)

Node

export ANTHROPIC_BASE_URL="http://127.0.0.1:7878/anthropic"

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  baseURL: "http://127.0.0.1:7878/anthropic",
});

Streaming smoke test

curl -sS -N -X POST \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model":"claude-sonnet-4-6","max_tokens":64,"stream":true,"messages":[{"role":"user","content":"ping"}]}' \
  http://127.0.0.1:7878/anthropic/v1/messages

-N disables curl buffering; SSE events arrive incrementally.

Claude Code

export ANTHROPIC_BASE_URL="http://127.0.0.1:7878/anthropic"
claude