Glossary: Observability

HTTP status codes

Also written: status code, HTTP status code, 200, 201, 404, 409, 500, 503

The number a server returns to say how a request went. Common ones are 200 (OK), 201 (created), 404 (not found), 409 (conflict, such as out of stock), 500 (server error) and 503 (a service depended on is unavailable).