ERROR input and output params do not match

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Renuka B

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Apr 13, 2025, 1:05:33 AMApr 13

to KrakenD Community

I pulled docker image v.2.9.3 krakenD and setup krakend watch.

Then i did basic configuration as below. But I get below error.
[00] ERROR parsing the configuration file: 'krakend.json': input and output params do not match. endpoint: GET /v1/weather/forecast, backend: 0. input: [], output: [appid lat lon]

I don't have issue when I pass them as path variables.

My config:

{
  "$schema": "https://www.krakend.io/schema/krakend.json",
  "version": 3,
  "name": "KrakenD-demo",
  "timeout": "3000ms",
  "cache_ttl": "300s",
  "output_encoding": "json",
  "debug_endpoint": true,
  "endpoints": [
    {
      "endpoint": "/v1/weather/forecast",
      "input_query_strings": [
        "lat",
        "lon",
        "appid"
      ],
      "backend": [
        {
          "host": [
            "https://api.openweathermap.org/"
          ],
          "url_pattern": "/data/2.5/forecast?lat={lat}&lon={lon}&appid={appid}"
        }
      ]
    }
  ]
}

Renuka B

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Apr 13, 2025, 1:05:46 AMApr 13

to KrakenD Community, Renuka B

I set up KrakenD through docker version 2.9.3 and setup krakend watch as well.

I face the below error when I try to get query params, but when i send the same in pathy params it works. The error is

[00] ERROR parsing the configuration file: 'krakend.json': input and output params do not match. endpoint: GET /v1/weather/forecast, backend: 0. input: [], output: [appid lat lon]