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# Configure Flow: JSON parser

# Configure Flow: JSON parser

To use JSON values within the flow, you can use the JSON parser to specify your own variables that are searched for and stored in the JSON payload passed. 
Each variable is given a user-defined name and the path in your JSON payload. 

| Use only ASCII characters for the variable name. 
 
In addition, you can specify whether a variable is mandatory. If this is then not found in the JSON payload, the flow terminates with a corresponding error message and does not execute any further functions.



The following syntax is used for the required JSON path, which is illustrated in the following example payload.

**Example Payload:**

`{
  "name": {"first": "Tom", "last": "Anderson"},
  "age": 37,
  "children": ["Sara","Alex","Jack"],
  "fav.movie": "Deer Hunter",
  {"friends": [
    {"first": "Dale", "last": "Murphy", "age": 44, "nets": ["ig", "fb", "tw"]},
    {"first": "Roger", "last": "Craig", "age": 68, "nets": ["fb", "tw"]},
    {"first": "Jane", "last": "Murphy", "age": 47, "nets": ["ig", "tw"]}
  ]
}`


| Syntax | Result | 
| --- | --- | 
|  name.last | Anderson |
| age | 37 |
| children | ["Sarah","Alex","Jack"] |
| children.# | 3 | 
| children.0 | Sarah | 
| child*.1 | Alex | 
| c?ildren.2 | Jack | 
| fav\.movie | DeerHunter | 
| friends.#.first | ["Dale","Roger","Jane"] | 
| friends.1.last | Craig | 



Further possibilities for processing and filtering via the JSON path can be found in [this documentation](https://github.com/tidwall/gjson#path-syntax).