Построить с помощью Free.ai - один символ Bearer, 477 AI.

import requests

r = requests.post(
    "https://api.free.ai/v1/chat/",
    headers={"Authorization": "Bearer sk-free-YOUR-KEY"},
    json={
        "model": "qwen2.5-7b",
        "messages": [{"role": "user", "content": "Hello!"}],
    },
)
print(r.json()["choices"][0]["message"]["content"])

const r = await fetch("https://api.free.ai/v1/chat/", {
  method: "POST",
  headers: {
    "Authorization": "Bearer sk-free-YOUR-KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "qwen2.5-7b",
    messages: [{role: "user", content: "Hello!"}],
  }),
});
const data = await r.json();
console.log(data.choices[0].message.content);

package main

import (
  "bytes"; "fmt"; "io"; "net/http"
)

func main() {
  body := []byte(`{"model":"qwen2.5-7b","messages":[{"role":"user","content":"Hello!"}]}`)
  req, _ := http.NewRequest("POST", "https://api.free.ai/v1/chat/", bytes.NewBuffer(body))
  req.Header.Set("Authorization", "Bearer sk-free-YOUR-KEY")
  req.Header.Set("Content-Type", "application/json")
  resp, _ := http.DefaultClient.Do(req)
  defer resp.Body.Close()
  out, _ := io.ReadAll(resp.Body)
  fmt.Println(string(out))
}

require "net/http"
require "json"

uri = URI("https://api.free.ai/v1/chat/")
req = Net::HTTP::Post.new(uri, {
  "Authorization" => "Bearer sk-free-YOUR-KEY",
  "Content-Type"  => "application/json",
})
req.body = {
  model: "qwen2.5-7b",
  messages: [{role: "user", content: "Hello!"}],
}.to_json

res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |h| h.request(req) }
puts JSON.parse(res.body)["choices"][0]["message"]["content"]