LESS REPETITION, MORE CONTROL

Define it once.
Change what matters.

Paylo substitutes values inside valid JSON. You decide which data goes in; the structure does not need to be rewritten for every test scenario.

01

Explicit variables.

Python dictionaries or Robot Framework data. No implicit environment reads.

02

Types stay intact.

A number stays a number. Booleans, lists, objects and null retain their types when they occupy the entire value.

03

Clear errors.

Paylo tells you when a variable is missing. Values are neither executed nor expanded again.

FROM VISUALIZATION TO REAL USE

Try your own template.

Edit the JSON and variables in the interactive documentation example.

Open the example↗

From a template to your tests

from paylo import render_template

payload = render_template(
    {"name": "{{customer.name}}", "quantity": "{{quantity}}", "active": "{{active}}"},
    {"customer": {"name": "Ana"}, "quantity": 3, "active": True},
)
assert payload == {"name": "Ana", "quantity": 3, "active": True}

The result retains the string, number and boolean. No HTTP request is sent.

User guide · Complete examples