# ONE Engine Text T9 Character Counter

> 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.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v3/text-token/characters/t9?utm_source=zero.xyz
- Price: $0.018/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-text-t9-character-counter-ef711095
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__5ydQRWVXEbDlhG4azEhV

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability one-engine-text-t9-character-counter-ef711095 -d '<json body>'
```

Example prompt: Count the characters in this text for me: 'The quick brown fox jumps over the lazy dog. This sentence needs to be measured precisely before I submit it.'

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "text"
 ],
 "properties": {
  "text": {
   "type": "string",
   "description": "Text up to 50000 characters"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-text-t9-character-counter-ef711095/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from one-search.one-engine.workers.dev](https://www.zero.xyz/host/one-search.one-engine.workers.dev/llms.txt)