The DeepFA AI API,
OpenAI-compatible

# pip install openai
from openai import OpenAI

client = OpenAI(
    api_key="YOUR_DEEPFA_KEY",
    base_url="https://deepfa.ir/api/v1",
)

completion = client.chat.completions.create(
    model="claude-sonnet-5",
    messages=[{"role": "user", "content": "Hello"}],
)

print(completion.choices[0].message.content)
print(completion.usage.total_tokens, "tokens")

// Any fetch, no SDK needed.
const res = await fetch('https://deepfa.ir/api/v1/chat/completions', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${DEEPFA_API_KEY}`,
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gpt-5.4',
    messages: [{ role: 'user', content: 'Hello' }],
    stream: false
  })
});

const data = await res.json();
console.log(data.choices[0].message.content);

// What the call cost, straight off the response header.
console.log(res.headers.get('x-deepfa-credits'), 'credits');

// npm install openai
import OpenAI from 'openai';

const client = new OpenAI({
  apiKey: process.env.DEEPFA_API_KEY,
  baseURL: 'https://deepfa.ir/api/v1'
});

// Streaming works exactly as it does upstream.
const stream = await client.chat.completions.create({
  model: 'gemini-3.8-flash',
  messages: [{ role: 'user', content: 'Write a haiku' }],
  stream: true
});

for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? '');
}

<?php

$ch = curl_init('https://deepfa.ir/api/v1/chat/completions');

curl_setopt_array($ch, [
    CURLOPT_POST           => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER     => [
        'Authorization: Bearer ' . getenv('DEEPFA_API_KEY'),
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'model'    => 'deepseek-chat',
        'messages' => [['role' => 'user', 'content' => 'Hello']],
    ]),
]);

$result = json_decode(curl_exec($ch), true);
curl_close($ch);

echo $result['choices'][0]['message']['content'];

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "net/http"
    "os"
)

func main() {
    body, _ := json.Marshal(map[string]any{
        "model": "claude-haiku-4-5",
        "messages": []map[string]string{
            {"role": "user", "content": "Hello"},
        },
    })

    req, _ := http.NewRequest("POST",
        "https://deepfa.ir/api/v1/chat/completions",
        bytes.NewBuffer(body))

    req.Header.Set("Authorization", "Bearer "+os.Getenv("DEEPFA_API_KEY"))
    req.Header.Set("Content-Type", "application/json")

    res, _ := http.DefaultClient.Do(req)
    defer res.Body.Close()

    var out map[string]any
    json.NewDecoder(res.Body).Decode(&out)
    fmt.Println(out["choices"])
}