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ONE Engine Text T9 Character Counter
x402
ONE Engine Text T9 Character Counter is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.018/call, status unknown (last checked 2026-10-02).
Counts characters in text using T9-style tokenization, returning character-level token counts for input text up to 50,000 characters.
Price / call$0.018
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
Returns a JSON object containing character count metrics for the submitted text, likely including total character count and T9-style token breakdown. The exact response fields are open (additionalProperties: true), so may include counts, breakdowns, or other text measurement data.
Example use cases
Pre-submission character limit check
“Before I submit this product description to the marketplace, count the characters to make sure it fits within their 500-character limit: 'Our premium ergonomic chair features lumbar support, breathable mesh back, and adjustable armrests for all-day comfort at the office.'”
SMS message length validation
“I need to know the character count for this SMS draft so I know how many message segments it will use: 'Hey! Just a reminder that your appointment is scheduled for tomorrow at 3pm. Please reply YES to confirm or call us at 555-0192 to reschedule. Thanks!'”
Social media post sizing
“Can you count the characters in this tweet I'm drafting? 'Excited to announce we're launching our new product line next Monday! Follow along for exclusive behind-the-scenes content and early access deals. #launch #newproduct'”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/text-token/characters/t9?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cheap, pay-per-call character counting or T9-style tokenization service without a subscription. Ideal for autonomous agents that occasionally need to measure text length before passing it to downstream services with character limits, or for validating content size constraints. At $0.018 USDC per call via x402 on Base, it suits sporadic, programmatic use cases rather than bulk batch processing.
Side effects
- Text exceeding 50,000 characters may be rejected or truncated
- Empty text input may return zero counts or an error
- Payment failure via x402/Base will prevent call execution
- Malformed JSON body will result in a 400-level error
- Network timeout on the Cloudflare Workers edge may occur under load
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | Text up to 50000 characters |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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