API: signatures and send examples

Signature guidance and request examples.

1. Screen structure

The upper reference panel presents str_hash construction and explains the secret parameter. A dark syntax-highlighted send example follows.

2. Controls and actions

Tabs offer cURL, PHP, Laravel, Python, Go and C++; the balance section begins underneath.

3. User journey and value

Explanations and language-specific examples help developers relate the reference to their tools. This is a documentation interface showcase.