# Pipeline to pipeline communication
**URL:** https://discuss.elastic.co/t/pipeline-to-pipeline-communication/272140
**Category:** Logstash
**Created:** [May 5, 2021, 7:31am UTC](https://discuss.elastic.co/t/pipeline-to-pipeline-communication/272140 "2021-05-05T07:31:55Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@bdn](https://discuss.elastic.co/u/bdn)
#### Post date: [May 5, 2021, 7:31am UTC](https://discuss.elastic.co/t/pipeline-to-pipeline-communication/272140/1 "2021-05-05T07:31:56Z")
I have a requirement. Events will be listening on some TCP ports in Logstash. using a filter plugin I will extract the username field from the event. After that, I have to query another API server providing that username and get the output back and store it in Elastic. What are the things that I have to look to build this pipepline? It can be done through logstash?
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### Author:  [@Wolfram\_Haussig](https://discuss.elastic.co/u/Wolfram_Haussig)
#### Post date: [May 5, 2021, 8:51am UTC](https://discuss.elastic.co/t/pipeline-to-pipeline-communication/272140/2 "2021-05-05T08:51:02Z")
Hello Bidhan,
Yes, this can be achieved using LogStash without having to use pipeline to pipeline communication. you need:
- [TCP input plugin](https://www.elastic.co/guide/en/logstash/current/plugins-inputs-tcp.html) to get the logs
- [Grok filter](https://www.elastic.co/guide/en/logstash/current/plugins-filters-grok.html) to extract the username
- [HTTP filter](https://www.elastic.co/guide/en/logstash/current/plugins-filters-http.html) to call the API server
- optionally, [Mutate filter](https://www.elastic.co/guide/en/logstash/current/plugins-filters-mutate.html) to remove uninteresting fields
- [Elasticsearch Output](https://www.elastic.co/guide/en/logstash/current/plugins-outputs-elasticsearch.html) to send the results to ElasticSearch
Best regards
Wolfram
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### Author:  [@bdn](https://discuss.elastic.co/u/bdn)
#### Post date: [May 5, 2021, 9:12am UTC](https://discuss.elastic.co/t/pipeline-to-pipeline-communication/272140/3 "2021-05-05T09:12:21Z")
Thank you for your reply. I thought the HTTP plugin is an output plugin. I was mistaken. 😃 Thanks for your suggestion.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 2, 2021, 9:12am UTC](https://discuss.elastic.co/t/pipeline-to-pipeline-communication/272140/4 "2021-06-02T09:12:44Z")
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