opensearch-docs-cn/_observability-plugins/ppl/endpoint.md

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---
layout: default
title: Endpoint
parent: Piped processing language
nav_order: 1
---
# Endpoint
Introduced 1.0
{: .label .label-purple }
To send a query request to PPL plugin, use the HTTP POST request.
We recommend a POST request because it doesn't have any length limit and it allows you to pass other parameters to the plugin for other functionality.
Use the `_explain` endpoint for query translation and troubleshooting.
## Request Format
To use the PPL plugin with your own applications, send requests to `_plugins/_ppl`, with your query in the request body:
```json
curl -H 'Content-Type: application/json' -X POST localhost:9200/_plugins/_ppl \
... -d '{"query" : "source=accounts | fields firstname, lastname"}'
```