Mistral AI API

api.mistral.ai · AI

AI Bearer Token Free Tier AI LLM Text Generation

Mistral AI models via API — Mistral 7B, Mixtral 8x7B, Mistral Large, and open-source weights. OpenAI-compatible endpoint. Free tier: 1B tokens/month.

Authentication

Bearer Token Free API key at console.mistral.ai. Pass as Authorization: Bearer YOUR_KEY.

Sample Requests

POST Chat completion

Chat with Mistral Small.

https://api.mistral.ai/v1/chat/completions

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Content-Type	application/json
Authorization	Bearer YOUR_KEY

Request Body — data you're sending

{
  "model": "mistral-small-latest",
  "messages": [
    {
      "role": "user",
      "content": "What is the meaning of life?"
    }
  ]
}

curl -X POST "https://api.mistral.ai/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"model":"mistral-small-latest","messages":[{"role":"user","content":"What is the meaning of life?"}]}'

import requests
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_ACCESS_TOKEN"
}
data = {
    "model": "mistral-small-latest",
    "messages": [
        {
            "role": "user",
            "content": "What is the meaning of life?"
        }
    ]
}
response = requests.post(
    "https://api.mistral.ai/v1/chat/completions",
    headers=headers,
    json=data,
)
print(response.json())

const url = 'https://api.mistral.ai/v1/chat/completions';

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN'
  },
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
  "model": "mistral-small-latest",
  "messages": [
    {
      "role": "user",
      "content": "What is the meaning of life?"
    }
  ]
}),
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	targetURL := "https://api.mistral.ai/v1/chat/completions"
	jsonData, _ := json.Marshal({"model":"mistral-small-latest","messages":[{"role":"user","content":"What is the meaning of life?"}]})
	req, _ := http.NewRequest("POST", targetURL, bytes.NewBuffer(jsonData))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer YOUR_ACCESS_TOKEN")
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.mistral.ai/v1/chat/completions")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Post.new(uri)
req["Content-Type"] = "application/json"
req["Authorization"] = "Bearer YOUR_ACCESS_TOKEN"
req["Content-Type"] = "application/json"
req.body = "{\"model\":\"mistral-small-latest\",\"messages\":[{\"role\":\"user\",\"content\":\"What is the meaning of life?\"}]}"

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.mistral.ai/v1/chat/completions";
$opts = ["http" => [
    "method" => "POST",
    "header" => implode("\r\n", [
        "Content-Type: application/json",
        "Authorization: Bearer YOUR_ACCESS_TOKEN",
        "Content-Type: application/json"
    ]),
    "content" => json_encode({"model":"mistral-small-latest","messages":[{"role":"user","content":"What is the meaning of life?"}]}),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET List models

List available Mistral models.

https://api.mistral.ai/v1/models

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Authorization

Bearer YOUR_KEY

curl -X GET "https://api.mistral.ai/v1/models" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN"

import requests
headers = {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN"
}
response = requests.get(
    "https://api.mistral.ai/v1/models",
    headers=headers,
)
print(response.json())

const url = 'https://api.mistral.ai/v1/models';

const response = await fetch(url, {
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN'
  },
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	targetURL := "https://api.mistral.ai/v1/models"
	req, _ := http.NewRequest("GET", targetURL, nil)
	req.Header.Set("Authorization", "Bearer YOUR_ACCESS_TOKEN")

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.mistral.ai/v1/models")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)
req["Authorization"] = "Bearer YOUR_ACCESS_TOKEN"

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.mistral.ai/v1/models";
$opts = ["http" => [
    "method" => "GET",
    "header" => implode("\r\n", [
        "Authorization: Bearer YOUR_ACCESS_TOKEN"
    ]),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

Get a free API key at console.mistral.ai
Set Authorization: Bearer YOUR_KEY
Endpoint is OpenAI-compatible — works with any OpenAI SDK
Models: mistral-small-latest, mistral-medium-latest, mistral-large-latest, mistral-embed
Free tier: 1 billion tokens/month (note: prompts may be used for training)

Open documentation ↗