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PennyRail Text Uppercase Converter
x402
PennyRail Text Uppercase Converter is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Converts an input string to uppercase via a paid micro-API endpoint using the x402 payment protocol
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
A JSON object containing the uppercase version of the submitted input string. The response schema is open (additionalProperties: true), so the exact field name for the result may vary, but the transformed all-caps text is the primary payload.
Example use cases
Normalize user input for display
“Take the string 'john doe — account holder' and convert it to all uppercase so I can use it in the header of a printed form.”
Standardize product codes in pipeline
“I need to uppercase the product code 'sku-abc-123x' before storing it in our inventory system — can you run it through the text uppercaser?”
Format legal document title
“Please convert 'terms and conditions agreement — version 2.0' to uppercase so it looks right as a section heading in the contract.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/text.uppercase--uppercase-textWhen to prefer
Choose this endpoint when you need a simple, on-demand text-to-uppercase conversion billed per call at $0.001 USDC via the x402 micropayment protocol. It is best suited for agent workflows that require pay-per-use text normalization without setting up a full NLP or text-processing service. If you need free or high-volume uppercase conversion, a local string method or free API would be more appropriate.
Side effects
- Missing 'input' field in request body — returns a validation error
- Payment not settled via x402 protocol — returns HTTP 402 Payment Required
- Non-string value passed as input — may cause a processing error
- Network or Vercel deployment downtime — returns 5xx error
- Empty string input — may return empty string or an error depending on server logic
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | string |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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