Use the Anthropic SDK with Manifest

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— / 30 days

App AI SDK

The official Anthropic Python and TypeScript SDKs accept a custom baseURL. Point them at Manifest and your messages.create calls (agents, chatbots, tool-using apps) route through the cheapest capable model.

— models routed through Manifest over the last 30 days.

Why use the Anthropic SDK with Manifest

Claude is a top-tier model, but you don't always need it. Manifest lets you keep the Anthropic SDK ergonomics (the same message shape, the same streaming API, the same tool-use contract) while downshifting to cheaper models when the prompt allows.

One baseURL swap, no SDK fork
Cut Claude API costs by 40–70% across your app
Keep the Anthropic message format: streaming, tool use, vision
Fall back to other providers when Anthropic rate limits hit
Per-app spend caps and audit logs in the dashboard
Open source, self-hostable, no lock-in

Setup in 60 seconds

Pass the Manifest base URL and key when constructing the client. The Anthropic SDK auto-appends /v1/messages, so the base URL should not include /v1.

Install the Python SDK and create a client pointing at Manifest:

from anthropic import Anthropic

client = Anthropic(
    base_url="https://api.manifest.build",
    auth_token="mnfst_YOUR_KEY",
)

message = client.messages.create(
    model="auto",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)

Install the TypeScript SDK and wire it to the Manifest endpoint:

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

const client = new Anthropic({
  baseURL: "https://api.manifest.build",
  authToken: "mnfst_YOUR_KEY",
});

const message = await client.messages.create({
  model: "auto",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello" }],
});

base_url / baseURL https://api.manifest.build

auth_token / authToken mnfst_YOUR_KEY

model auto

Anthropic SDK tokens processed on Manifest

Models in use

# Model	Auth type	Tokens / last 30 days