# ONE Engine Text Tail – Last 24 Unicode Characters (Tier 10)

> ONE Engine Text Tail – Last 24 Unicode Characters (Tier 10) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-16).

Extracts and returns the last 24 Unicode characters from a given text input, with Tier 10 richer diagnostic metadata included in the response.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v6/text-tail/chars-24/t10?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-text-tail-last-24-unicode-characters-tier-10-0726fbf6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p53LQlxOpjZGYmJ4zmkuH

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-tail-last-24-unicode-characters-tier-10-0726fbf6 -d '<json body>'
```

Example prompt: Give me the last 24 Unicode characters of this string: '日本語テキストサンプル — this is a mixed Unicode test string!' and include the full diagnostic output.

## When to prefer this

Choose this endpoint when you need to extract precisely the last 24 Unicode characters from a string with accompanying diagnostic output. It is ideal when working with multilingual or emoji-heavy text where byte length differs from character count, and when you need the richer Tier 10 diagnostic metadata for debugging or validation purposes.

## Known failure modes

- Input text shorter than 24 characters may return the full string or an error
- Empty string input may return an empty result or validation error
- Non-UTF-8 or malformed byte sequences may cause parsing errors
- Missing request body returns a 400 bad request
- Payment not included or invalid results in 402 Payment Required

## How this service works

Return last 24 Unicode characters. Tier 10/10 adds richer diagnostics.

## Output

Returns the last 24 Unicode characters extracted from the submitted text, along with Tier 10 richer diagnostic information such as character counts, encoding details, and processing metadata to aid in debugging and validation.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-text-tail-last-24-unicode-characters-tier-10-0726fbf6/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)