SwissAI API

Quickstart

Three steps to your first response:

1. In the developer dashboard, create a key under API Keys. It is shown only once — store it safely. Format: sk-souheng-…

2. Send a request to the chat endpoint:

curlcurl -N https://api.swiss-ai.one/api/v1/external/chat/completions \
  -H "Authorization: Bearer sk-souheng-YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "messages": [{ "role": "user", "content": "Say hello in Swiss German." }],
    "stream": true
  }'

3. You get back an OpenAI-compatible SSE stream (see Streaming).

Authentication

Authenticate every request with your API key in the Authorization header:

httpAuthorization: Bearer sk-souheng-YOUR_KEY

API keys are managed exclusively in the portal (create, list, revoke). Up to 20 active keys per account.

Base URL

POST/api/v1/external/chat/completions

Generates a chat response. Streaming is on by default.

Request body

Streaming (SSE)

With "stream": true the API returns text/event-stream in OpenAI chunk format. The stream ends with data: [DONE].

ssedata: {"id":"chatcmpl-1a2b3c4d","object":"chat.completion.chunk","created":1750000000,"model":"swissai","choices":[{"index":0,"delta":{"content":"Hallo"},"finish_reason":null}]}

data: {"id":"chatcmpl-1a2b3c4d","object":"chat.completion.chunk","created":1750000000,"model":"swissai","choices":[{"index":0,"delta":{"content":"!"},"finish_reason":null}]}

data: {"id":"chatcmpl-1a2b3c4d","object":"chat.completion.chunk","created":1750000000,"model":"swissai","choices":[{"index":0,"delta":{},"finish_reason":"stop"}]}

data: [DONE]

Without streaming

With "stream": false you receive a single chat.completion object:

json{
  "id": "chatcmpl-1a2b3c4d",
  "object": "chat.completion",
  "created": 1750000000,
  "model": "swissai",
  "choices": [
    {
      "index": 0,
      "message": { "role": "assistant", "content": "Hello! How can I help?" },
      "finish_reason": "stop"
    }
  ]
}

Tools / function calling

Pass tools in OpenAI format. When the model calls a tool, tool_calls come back (streaming or non-streaming). Send the result back as a tool message with the matching tool_call_id.

json{
  "messages": [{ "role": "user", "content": "What's the weather in Zürich?" }],
  "stream": false,
  "tools": [{
    "type": "function",
    "function": {
      "name": "get_weather",
      "description": "Current weather for a city",
      "parameters": {
        "type": "object",
        "properties": { "city": { "type": "string" } },
        "required": ["city"]
      }
    }
  }],
  "tool_choice": "auto"
}

Python

requests (streaming)

pythonimport json, requests

resp = requests.post(
    "https://api.swiss-ai.one/api/v1/external/chat/completions",
    headers={"Authorization": "Bearer sk-souheng-YOUR_KEY"},
    json={"messages": [{"role": "user", "content": "Hello"}], "stream": True},
    stream=True,
)
for line in resp.iter_lines():
    if not line:
        continue
    line = line.decode()
    if line.startswith("data: "):
        data = line[6:]
        if data == "[DONE]":
            break
        delta = json.loads(data)["choices"][0]["delta"]
        print(delta.get("content", ""), end="", flush=True)

JavaScript / Node

javascriptconst res = await fetch(
  "https://api.swiss-ai.one/api/v1/external/chat/completions",
  {
    method: "POST",
    headers: {
      "Authorization": "Bearer sk-souheng-YOUR_KEY",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      messages: [{ role: "user", content: "Hello" }],
      stream: true,
    }),
  }
);

const reader = res.body.getReader();
const decoder = new TextDecoder();
let buffer = "";
for (;;) {
  const { done, value } = await reader.read();
  if (done) break;
  buffer += decoder.decode(value, { stream: true });
  const lines = buffer.split("\n");
  buffer = lines.pop();
  for (const line of lines) {
    if (!line.startsWith("data: ")) continue;
    const data = line.slice(6);
    if (data === "[DONE]") { reader.cancel(); break; }
    const delta = JSON.parse(data).choices[0].delta;
    if (delta.content) process.stdout.write(delta.content);
  }
}

OpenAI SDK

Existing OpenAI SDKs work by setting base_url and api_key. model is a required SDK field but is ignored server-side.

pythonfrom openai import OpenAI

client = OpenAI(
    api_key="sk-souheng-YOUR_KEY",
    base_url="https://api.swiss-ai.one/api/v1/external",
)

stream = client.chat.completions.create(
    model="swissai",  # anything — ignored
    messages=[{"role": "user", "content": "Hello"}],
    stream=True,
)
for chunk in stream:
    print(chunk.choices[0].delta.content or "", end="")

javascriptimport OpenAI from "openai";

const client = new OpenAI({
  apiKey: "sk-souheng-YOUR_KEY",
  baseURL: "https://api.swiss-ai.one/api/v1/external",
});

const stream = await client.chat.completions.create({
  model: "swissai",            // anything — ignored
  messages: [{ role: "user", content: "Hello" }],
  stream: true,
});
for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}

Billing & limits

• Requests are billed token-based against your balance (wallet).
• You can see balance and usage in the dashboard, where you can also top up.
• Up to 20 active API keys per account.

Error codes