---
title: "Combined ECHO Metadata Service"
method: POST
path: "/echo_rest_services.metadata"
tags: ["Metadata"]
---

# Combined ECHO Metadata Service

`POST /echo_rest_services.metadata`

Returns the JSON Object Name and ColumnId for usage with the qcolumns parameter for get_qid, get_facility_info and other service endpoints.

## Response `200`

Results are an array of columns/objects.

- object — Root Object
  - `Results` Meta1, required — Results Object
    - `Message` string, required — Field to record messages (typically performance-related) about packet processing
    - `ResultColumns` Meta3[]
      - `ColumnID` string, required
      - `ColumnName` string, required
      - `DataLength` string, required — Data length for EPA program database column.
      - `DataType` string, required — Data type for EPA program database column.
      - `Description` string, required
      - `ObjectName` string, required — The JSON name used for the database column.

---

[API](https://skmtc.net/usepa/apis/echo.md) · [All operations](https://skmtc.net/usepa/apis/echo/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/usepa/echo/versions/613a7b5c6759/schema)