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Text Prefix Classifier
x402
Text Prefix Classifier is a paid API for AI agents from digitalworkerapi.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Trims whitespace from a text string and checks whether it starts with a given prefix, returning a boolean result.
Price / call$0.001
Success—
StatusUnknown
How this service works
Trim text and determine whether it starts with a supplied prefix.
Output
Returns a JSON object indicating whether the trimmed input text starts with the supplied prefix (boolean), along with the trimmed version of the text.
Example use cases
Command prefix detection in chatbot
“Check if this user message starts with the slash command prefix '/help': ' /help me with this issue'”
URL scheme validation
“Does this URL start with 'https' after trimming whitespace? The string is ' https://example.com/page'”
Log line classification by severity
“Tell me if this log entry starts with 'WARN' after trimming it: ' WARN: disk space low on node-3'”
Technical details
Endpoint
POSThttps://digitalworkerapi.com/v1/tools/text-prefix-classifier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, reliable, pay-per-call check on whether a string begins with a specific prefix — especially in agent pipelines where you want to route, classify, or gate on text prefixes without spinning up a full NLP model. Ideal for command detection, protocol checking, log classification, or any scenario where trimming whitespace before the prefix check matters.
Side effects
- Missing required body fields returns a 400-level error
- Empty prefix string may produce unexpected always-true results
- Very large text bodies may be rejected or truncated
- Malformed JSON body returns a parsing error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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