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Variables

About Variables

Variables are a very important part of Custom Actions. A Webhook.site Variable is characterized by a name surrounded by two dollar signs: $example$. They act as placeholders that are replaced by dynamic content as the request or email is received.

In the Custom Actions editor, variables can be used in any field that has a ⓥ icon.

Each request, email or DNSHook has a set of Base Variables that are always present and contain information like the request IP, method, headers, query string values, form values and the request content.

To see a list of Variables in the Custom Actions editor, click the Variables button in the editor. Clicking on a variable copies it to the clipboard.

Variables Menu

After clicking Test on an action, additional variables created by the actions are also shown.

Many Actions set at least one variable. For example, the result of a JSONPath query can be registered to a variable like $jsonpath$ and entered in a "Modify Response" action to make the response dynamic, or even use it to send a request to another URL via the HTTP Request action – and then use the response of that!

Files can referred to and incorporated in Custom Action workflows via the request.file.* Base Variables.

Variables work since Custom Actions are executed synchronously in a chain, sharing data as they're being executed.

Global Variables

In Webhook.site Control Panel, you can define Global Variables which can be accessed between all URLs and used in Schedules. Global Variables are permanent.

Global Variables can also be created, modified or deleted using Custom Actions, including in WebhookScript and JavaScript actions.

Additionally, Global Variables can be managed using the Webhook.site API.

Base Variables

These variables are automatically available for each request or email. Different variables are available depending on the type.

Variable Name Available For Description
request.uuid All The UUID of the request
request.token_id All The Token UUID (URL ID) of the request
request.content All The body content of the request
request.date All Creation date in Y-m-d H:m:s format
request.timestamp All Creation date in UNIX timestamp format
request.hostname All Hostname of the request (usually webhook.site)
request.header.[name] All Created for each HTTP header
request.size All Request body size in bytes
request.type All Request type (email or web)
request.file.[name].filename All Created for each file upload, with name being the input name property. Contains the client file name
request.file.[name].size All Contains the file size in bytes
request.file.[name].content All Contains the file content
request.file.[name].content_type All Contains the file content type (e.g. image/png)
request.file.[name].id All Contains the Webhook.site file ID
request.file.[name].link All Contains the direct download link to the file from Webhook.site's server.
request.query.[name] Web Created for each query string (e.g. ?name=value)
request.form.[name] Web Created for each form field
request.ip Web IP of the host making the request
request.user_agent Web User agent header
request.url Web Full URL of the request (e.g. https://webhook.site/xxx-xxx...)
request.path Web Sub-path of URL, after the token ID. Defaults to /
request.query Web Full query string of the URL
request.method Web HTTP method (GET, POST, etc.)
request.sender Email Sender address
request.message_id Email Email message ID
request.text_content Email Parsed plaintext content
request.html_content Email Parsed HTML content
request.destinations Email Comma separated list of recipients.
request.checks.[name] Email True or false for email checks (DKIM, SPF, etc.)

Variable Modifiers

Adding specific suffixes to variable names will let you process the value in the following ways:

Variable Example Input Output Description
$example$ {"json": "value"} {"json": "value"} no modifier
$example.json$ {"json": "value"} {\"json\": \"value\"} Escapes all special JSON characters, allowing to use any string in a JSON object. Escaped characters include \b, \f, \n, \r, \t, ", \
$example.html_encode$ <p>some html</p> &lt;p&gt;some html&lt;/p&gt; Escapes all special HTML characters
$example.html_decode$ &lt;p&gt;some html&lt;/p&gt; <p>some html</p> Replaces all escaped HTML escapes with normal characters
$example.html_strip$ <p>some html</p> some html Removes all HTML tags from input string
$example.base64_encode$ {"json": "<b>value</b>"} eyJqc29uIjogIjxiPnZhbHVlPC9iPiJ9Cg== Encodes the variable to base64
$example.base64_decode$ eyJqc29uIjogIjxiPnZhbHVlPC9iPiJ9Cg== {"json": "<b>value</b>"} Decodes a base64 encoded string
$example.url_encode$ {"json": "value"} %7B%22json%22%3A+%22value%22%7D Escapes all special HTTP URL characters
$example.url_decode$ %7B%22json%22%3A+%22value%22%7D {"json": "value"} Replaces all special HTTP URL escapes with normal characters

Last update: May 3, 2024 12:38:13