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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 2026-09-15).
Converts an input string to uppercase text via a paid micro-transaction API endpoint
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing the operation name (e.g. 'text.uppercase') and the result, which is the input string transformed to all uppercase characters.
Example use cases
Normalize user input for comparison
“Take the string 'john doe' and convert it to uppercase so I can do a case-insensitive comparison in my database lookup.”
Format product code for display
“I need to display the product code 'sku-abc123x' in all caps on the invoice — can you uppercase it for me?”
Standardize country code submission
“Convert the country name 'united states' to uppercase before I submit it to the external compliance API that requires all-caps input.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/f/text.uppercaseWhen to prefer
Choose this endpoint when you need a simple, reliable, pay-per-call uppercase text transformation with no authentication setup and deterministic output. Best suited for lightweight agent workflows that need string normalization on demand without maintaining a service subscription.
Side effects
- Missing 'input' field returns a validation error
- Non-string input may cause type errors or unexpected results
- Payment of 0.001 USDC must succeed via x402 protocol or the call is rejected
- Empty string input may return an empty result without error
- Network timeout on Vercel serverless cold start
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | string | string |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| resultrequired | — | |
| operationrequired | string |
Tags
x402
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