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Update content/resources/how-to-guides/reduce-to-construct-JSON.md

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## Send data in JSON body with `http.post()`
Use the [reduce()](/flux/v0.x/stdlib/universe/reduce/) function to create a JSON object to include as the body with `http.post()`.
1. Boilerplate. Import packages. The [array](/flux/v0.x/stdlib/array/) package is used to construct tables so you can run this script yourself. The [http package](/flux/v0.x/stdlib/http/) is used to transfer the JSON over http.
1. Import both the [array](/flux/v0.x/stdlib/array/) package to query data and contruct table(s), and the [http package](/flux/v0.x/stdlib/http/) to transfer JSON over http.
2. Use `array.from()` to query data and construct a table. Or, use another method [to query data with Flux](/influxdb/v2.3/query-data/flux/).
3. Use the `reduce()` function to start constructing a JSON. The output of reduce is stored in the result `output of reduce`. This table looks like: