Claude Haiku 4.5 API

Quickstart

This model uses Anthropic's native /v1/messages endpoint — auth via the x-api-key header, not Authorization Bearer. Compatible with the official Anthropic SDK by setting base_url to https://api.skillboss.co.

bashcurl https://api.skillboss.co/v1/messages \
  -H "x-api-key: $SKILLBOSS_WHOLESALE_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-haiku-4-5",
    "max_tokens": 1024,
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }'

Your first 200 response is the fastest way to confirm setup. From there, swap in your real prompt and tune the model-specific parameters listed below.

Authentication

Every request must include your wholesale key. The header name depends on the endpoint — match the SDK you're using:

bashx-api-key: $SKILLBOSS_WHOLESALE_KEY

Anthropic's native API uses x-api-key (not Authorization Bearer) — the official Anthropic SDK sets this automatically when you pass api_key to the client. The anthropic-version header is also required by the upstream Anthropic API.

Code examples

pythonimport os
from anthropic import Anthropic

client = Anthropic(
    api_key=os.environ["SKILLBOSS_WHOLESALE_KEY"],
    base_url="https://api.skillboss.co",
)

resp = client.messages.create(
    model="anthropic/claude-haiku-4-5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)
print(resp.content[0].text)

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

const client = new Anthropic({
  apiKey: process.env.SKILLBOSS_WHOLESALE_KEY,
  baseURL: "https://api.skillboss.co",
});

const resp = await client.messages.create({
  model: "anthropic/claude-haiku-4-5",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello" }],
});

console.log(resp.content[0].text);

Parameters

Anthropic /v1/messages parameters. Important: max_tokens is REQUIRED (unlike OpenAI where it's optional), and the system prompt is a top-level field (not a message with role=system).

Endpoint

Errors

The API uses standard HTTP status codes:

Pricing