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Delx Sentence Case
x402
Delx Sentence Case is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Converts an input string to sentence case (first letter of first word capitalized, rest lowercase) for $0.001 USDC per call
Price / call$0.001
Success—
StatusUnknown
How this service works
Sentence-case a string for $0.001 USDC. Use this when an agent needs sentence case inside a workflow without installing a library or managing an API key. Deterministic first-party execution, structured JSON output, no subscription, and payment only for a successful result.
Output
A structured JSON object containing the sentence-cased version of the input string, where the first character of the text is uppercased and all remaining characters are lowercased, returned only upon successful transformation.
Example use cases
Normalize user-submitted form input
“I'm getting user-submitted text that's all over the place with capitalization — can you apply sentence case to this string so it looks clean before I store it: 'PLEASE REVIEW MY APPLICATION BEFORE THE DEADLINE'?”
Fix blog post draft casing
“This draft paragraph came in weirdly capitalized — can you sentence-case it for me: 'WE LAUNCHED OUR NEW PRODUCT Last Week AND IT HAS BEEN amazing'?”
Format chatbot reply snippet
“I need this chatbot response snippet put into proper sentence case before it goes out to the user: 'THANK YOU FOR CONTACTING SUPPORT. YOUR TICKET HAS BEEN RECEIVED.'”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/sentence-case?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, server-side sentence-case conversion inside an agent workflow without installing a string-manipulation library, managing an API key subscription, or pre-paying for a monthly plan. It is ideal for pay-per-use pipelines where you only want to pay ($0.001 USDC) when the transformation actually succeeds. Prefer this over client-side logic when you need consistent, auditable, first-party text normalization with structured JSON output.
Side effects
- Input text exceeds 100,000 character limit — request rejected
- Empty or missing text field — validation error returned
- Payment of $0.001 USDC not successfully processed — no result returned
- Malformed JSON request body — parse error response
- Network timeout on the x402 payment flow before result is returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Primary text input (max 100k chars). Processed first-party; not retained as a dataset. |
Output
Schema · Response
{
"type": "json",
"example": {
"text": "Hello agent world",
"schema": "delx/sentence-case/v1",
"source_len": 17
}
}Tags
x402
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