SDKs and frameworks
Anthropic SDK
Point the Anthropic Python / TypeScript SDK at TokRouter — base_url is the gateway origin, the SDK appends /v1/messages.
The Anthropic SDK's base_url is an origin (no /v1); the SDK appends /v1/messages itself.
Python
import os
import anthropic
client = anthropic.Anthropic(
api_key=os.environ["TOKROUTER_API_KEY"],
base_url="https://api.tokrouter.dev",
)
with client.messages.stream(
model="claude-opus-5-5",
max_tokens=1024,
messages=[{"role": "user", "content": "Explain tool use in one sentence"}],
) as stream:
for text in stream.text_stream:
print(text, end="", flush=True)TypeScript
import Anthropic from '@anthropic-ai/sdk'
const client = new Anthropic({
apiKey: process.env.TOKROUTER_API_KEY!,
baseURL: 'https://api.tokrouter.dev',
})
const msg = await client.messages.create({
model: 'claude-sonnet-5',
max_tokens: 512,
messages: [{ role: 'user', content: 'Hello' }],
})Call other vendors with the Anthropic SDK
Pass any catalog model id as model, e.g. gpt-5.4 or deepseek-v4-pro. The inbound protocol is
Anthropic; the gateway maps it onto the target vendor.
Details: Anthropic protocol.