ApplicationText-based

`application/problem+json`

Problem Details (JSON)

Reference for application/problem+json, the MIME type for RFC 7807 problem details in HTTP API error responses.

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HTTP Content-Type Header

HTTP Header

Content-Type: application/problem+json; charset=utf-8

Quick Facts

MIME Type	application/problem+json
Category	Application
Type	Text-based (human-readable)

Common Usage

RFC 7807 defines a standardized format for HTTP API error responses. Problem Details JSON includes a type URI, title, status code, detail message, and optional extensions.

Adopted by many REST APIs to provide consistent, machine-readable error information.

Code Examples

HTML

<!-- Set MIME type in meta or fetch headers -->
<meta http-equiv="Content-Type" content="application/problem+json">

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('application/problem+json');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'application/problem+json' });

nginx

# nginx.conf — add to types block or use default
types {
    application/problem+json  json;
}

# Or set for a specific location
location /api/ {
    default_type application/problem+json;
}