Authentication

Get your API keys and make your first authenticated request.

1. Get your API keys

Sign up or log in at console.mathpix.com and copy your app_id and app_key from the API keys page.

2. Make a request

Every request requires app_id and app_key headers. Here's a minimal example that processes an image:

cURL

curl -X POST https://api.mathpix.com/v3/text \
-H 'app_id: APP_ID' \
-H 'app_key: APP_KEY' \
-H 'Content-Type: application/json' \
--data '{"src": "https://mathpix-ocr-examples.s3.amazonaws.com/cases_hw.jpg"}'

Python

import requests
r = requests.post("https://api.mathpix.com/v3/text",
    json={"src": "https://mathpix-ocr-examples.s3.amazonaws.com/cases_hw.jpg"},
    headers={
        "app_id": "APP_ID",
        "app_key": "APP_KEY",
        "Content-type": "application/json"
    }
)
print(r.json())

JavaScript / TypeScript

const response = await fetch("https://api.mathpix.com/v3/text", {
  method: "POST",
  headers: {
    app_id: "APP_ID",
    app_key: "APP_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    src: "https://mathpix-ocr-examples.s3.amazonaws.com/cases_hw.jpg",
  }),
});
const result = await response.json();
console.log(result);

Go

body := bytes.NewBufferString(`{
    "src": "https://mathpix-ocr-examples.s3.amazonaws.com/cases_hw.jpg"
}`)
req, _ := http.NewRequest("POST", "https://api.mathpix.com/v3/text", body)
req.Header.Set("app_id", "APP_ID")
req.Header.Set("app_key", "APP_KEY")
req.Header.Set("Content-Type", "application/json")
resp, _ := http.DefaultClient.Do(req)
defer resp.Body.Close()
result, _ := io.ReadAll(resp.Body)
fmt.Println(string(result))

Java

HttpClient client = HttpClient.newHttpClient();
String body = """
    {
      "src": "https://mathpix-ocr-examples.s3.amazonaws.com/cases_hw.jpg"
    }
    """;
HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://api.mathpix.com/v3/text"))
    .header("app_id", "APP_ID")
    .header("app_key", "APP_KEY")
    .header("Content-Type", "application/json")
    .POST(HttpRequest.BodyPublishers.ofString(body))
    .build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());

Replace APP_ID and APP_KEY with your actual credentials.

3. Verify the response

A successful request returns JSON with the recognized content:

Example response

{
  "text": "\\( x=\\frac{-b \\pm \\sqrt{b^{2}-4 a c}}{2 a} \\)",
  "confidence": 0.9985,
  "confidence_rate": 0.9985
}

If you see an error field instead, check that your app_id and app_key are correct and that your account is active.

Next steps

• Authentication reference — full details on API keys, app tokens, and per-endpoint auth requirements
• Process a PDF — submit documents for async OCR
• Process an image — single image processing with options