n8n - 💡(How to fix) Fix HTTP Request GET returns empty list from external API - same call works in Swagger with identical token

Describe the problem/error/question An HTTP Request node (GET) to an external API always returns an empty list: [] with total: 0 from n8n cloud, but the exact same request with the exact same Bearer token works perfectly in Swagger and returns the expected data. This worked correctly for 300+ executions before stopping suddenly. What is the error message (if any)? No error message. The node returns HTTP 200 with this response: json{ "code": 0, "message": "success", "data": { "list": [], "meta": { "current": 1, "page_size": 10, "total": 0 } } } Please share your workflow/screenshots/recording The failing node configuration:

Method: GET URL: https://api.nextsmartship.com/oms/v3/orders Query Parameter: platform_order_number = #7485 Header: Authorization = Bearer [token] Header: Accept = application/json

What we have verified and ruled out:

The Bearer token generated by the OAuth node is valid — confirmed by copying the exact token from n8n's OAuth node output and using it in Swagger, which returns correct data The API has no IP restrictions (confirmed by API provider support) The API has not changed (confirmed by API provider support) The query parameter value #7485 is correct — confirmed working in Swagger Tested with query parameters as "Using Fields Below", "Using JSON", and with platform_order_number[] — all return empty Tested with a Code node using fetch() — returned "No output data" silently Updated n8n from 2.20.7 to 2.21.5 — issue persists The issue affects ALL orders, including ones that worked fine before

Share the output returned by the last node n8n output: json{ "code": 0, "message": "success", "data": { "list": [], "meta": { "current": 1, "page_size": 10, "total": 0 } } } Swagger output with identical token and parameters: json{ "code": 0, "message": "success", "data": { "list": [ { "order_number": "3379932822245476352", "customer_order_number": "#7485", ...full order data... } ], "meta": { "current": 1, "page_size": 10, "total": 1 } } } Debug info core

n8nVersion: 2.21.5 platform: docker (cloud) nodeJsVersion: 24.15.0 nodeEnv: production database: sqlite executionMode: regular concurrency: 5 license: enterprise (sandbox)

storage

success: all error: all progress: false manual: true binaryMode: filesystem

pruning

enabled: true maxAge: 168 hours maxCount: 2500 executions

client

userAgent: mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/148.0.0.0 safari/537.36 isTouchDevice: false

Generated at: 2026-05-21T06:32:13.239Z

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