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ONE Engine Character Count
x402
ONE Engine Character Count is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0009/call, status unknown (last checked 2026-10-02).
Counts the total number of characters in a given text string and returns the count as a JSON integer.
Price / call$0.0009
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
A JSON object containing a single field 'characters' with an integer value representing the total character count of the submitted text string, e.g. {"characters": 42}.
Example use cases
Validate tweet length before posting
“Count the characters in this draft tweet so I can check if it fits within the 280-character limit: 'Excited to announce our new product launch — join us live on Thursday at 3pm EST for a full demo and Q&A!'”
Check API field character constraint
“Can you count how many characters are in this product description so I know if it'll fit in the 500-character database field: 'Our premium wireless headphones deliver studio-quality sound with 40-hour battery life and active noise cancellation.'”
Measure text length for billing estimate
“Count the characters in this paragraph for me — I need to know the exact character count to estimate the cost before I send it to the translation API: 'The quarterly financial results exceeded analyst expectations, driven by strong growth in cloud services and international markets.'”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/text/character-count?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cheap, fast, deterministic character count with no local computation — ideal for autonomous agents running in environments where string length functions are unavailable or when you need a pay-per-call metered utility via x402 on Base. Prefer it over manual computation when integrating into an agent pipeline that already handles x402 micropayments.
Side effects
- Missing or empty 'text' field in request body may return an error or zero count
- Payment failure via x402 protocol results in a 402 response before the computation is performed
- Extremely large text strings may be rejected or time out due to Cloudflare Workers payload limits
- Malformed JSON request body returns a parsing error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string |
Output
Schema · Response
{
"type": "json",
"example": {
"characters": 7
}
}Tags
x402
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