HTTP 414 — URI Too Long
HTTP 414 rejects a URL past the server’s length tolerance. Headers have generous room, but request lines have practical ceilings that long query strings eventually exceed.
When 414 shows up
- GET requests abused as data carriers with enormous query parameters.
- Generated URLs embedding long state blobs or filter sets.
Mocking a 414 response
A response with this status can be faked end to end with a local mock rule — no backend changes needed. The configuration below mirrors the rule fields the ApiSimul editor uses (method, path, status, delay in milliseconds, response body):
{
"method": "GET",
"path": "/search",
"status": 414,
"delay": 150,
"enabled": true,
"body": {
"error": "uri_too_long",
"maxChars": 2048
}
}Dynamic placeholders such as {{random.name}}, {{string.uuid}} or {{number.int 1 100}} can appear inside the body to vary each response, which keeps client-side list rendering and retry logic honest during development.
Frequently asked questions
What does HTTP 414 mean?
The request URL exceeds the server’s limit. Moving data from the query string into a request body is the standard fix.
How can I test a 414 response without a real backend?
Define a mock rule with the method and path your client requests and set the status to 414. The example configuration above returns this response after the listed delay, so the client exercises its 414 handling exactly as it would against a live server.
Related status codes
Need the response in your own project? Spin up rules for any status with the ApiSimul mock server, or browse every status code page.