How to pass multiple same query parameters for HTTP request

whitford-olmst · September 17, 2025, 7:57pm

I have an HTTP Request that I need to pass an array of query parameters, like:

?q_organization_keyword_tags[]=financial&q_organization_keyword_tags[]=investment

I fill out the query parameter form like this:

This doesn’t work – only the last value is being transmitted. How can I get this to work?

Information on your n8n setup

n8n version: 1.111.0
Running n8n via (Docker, npm, n8n cloud, desktop app): Cloud

jabbson · September 17, 2025, 8:06pm

Hey @whitford-olmst hope all is good.

This certainly looks like a bug. You can report it here.

In the meantime you could try to just regularly append them to the URL?..

mohamed3nan · September 17, 2025, 8:14pm

Yes appending them to the URL works as expected, but using the query parameter fields does not work.

However, there’s something strange that makes it work: by creating one field with [] like this and the other without []:

the result:

jabbson · September 17, 2025, 8:22pm

My bet is internally they are collected into a hash which eliminates the ones with the same “key”.

jabbson · September 17, 2025, 8:33pm

Yup, I think it happens right here:

github.com/n8n-io/n8n

packages/nodes-base/nodes/HttpRequest/V3/HttpRequestV3.node.ts

master


      
          
          						accumulator[cur.name] = {
          							value: uploadData,
          							options: {
          								filename: binaryData.fileName,
          								contentType: binaryData.mimeType,
          							},
          						};
          						return accumulator;
          					}
          					accumulator[cur.name] = cur.value;
          					return accumulator;
          				};
          
          				// Get parameters defined in the UI
          				if (sendBody && bodyParameters) {
          					if (specifyBody === 'keypair' || bodyContentType === 'multipart-form-data') {
          						requestOptions.body = await prepareRequestBody(
          							bodyParameters,
          							bodyContentType,
          							nodeVersion,

jabbson · September 17, 2025, 8:36pm

If you dont wish to deal with opening a bug, let me know, I will do it for ya.

whitford-olmst · September 18, 2025, 7:01pm

Thank you for the offer @jabbson , but I submitted a bug report:
* HTTP request unable to pass multiple values for the same query parameter · Issue #19727 · n8n-io/n8n · GitHub

Jon · September 18, 2025, 7:11pm

Just to quickly add we do see issues here as well, they don’t need to be duplicated on GitHub

system · December 17, 2025, 7:12pm

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