Raw API access

Don't want a CLI? Here are minimum runnable examples in curl + Python + Node.js for both protocols — copy and paste.

Which protocol?

• OpenAI protocol — broadest compatibility (chat completions, function calling, embeddings). Base URL: https://primerouter.ai/v1
• Anthropic protocol — byte-identical with Anthropic's official SDKs. Base URL: https://primerouter.ai

OpenAI protocol

curl

curl https://primerouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $PRIMEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "messages": [
      {"role": "user", "content": "Introduce PrimeRouter in one sentence."}
    ]
  }'

Python (openai>=1.0)

from openai import OpenAI

client = OpenAI(
    base_url="https://primerouter.ai/v1",
    api_key="sk-your-primerouter-key",
)

resp = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "hello"}],
)
print(resp.choices[0].message.content)

Node.js (openai SDK)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://primerouter.ai/v1",
  apiKey: process.env.PRIMEROUTER_API_KEY,
});

const resp = await client.chat.completions.create({
  model: "claude-sonnet-4-6",
  messages: [{ role: "user", content: "hello" }],
});
console.log(resp.choices[0].message.content);

Anthropic protocol

curl

curl https://primerouter.ai/v1/messages \
  -H "x-api-key: $PRIMEROUTER_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "hello"}]
  }'

Python (anthropic SDK)

from anthropic import Anthropic

client = Anthropic(
    base_url="https://primerouter.ai",
    api_key="sk-your-primerouter-key",
)

resp = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "hello"}],
)
print(resp.content[0].text)

Node.js (@anthropic-ai/sdk)

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

const client = new Anthropic({
  baseURL: "https://primerouter.ai",
  apiKey: process.env.PRIMEROUTER_API_KEY,
});

const resp = await client.messages.create({
  model: "claude-sonnet-4-6",
  max_tokens: 1024,
  messages: [{ role: "user", content: "hello" }],
});
console.log(resp.content[0].text);

Next

• API docs overview — every endpoint
• Authentication — key schemes
• Streaming — SSE + partial chunks
• Error codes — retry + fallback semantics