# ONE Engine Text Head – First 32 Unicode Characters (Tier 10)

> ONE Engine Text Head – First 32 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).

Returns the first 32 Unicode characters from a submitted text string, with Tier 10 richer diagnostic metadata included in the response.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v6/text-head/chars-32/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-head-first-32-unicode-characters-tier-10-f01a8ead
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7V70CzYkxMytTH0j79Ilv

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-head-first-32-unicode-characters-tier-10-f01a8ead -d '<json body>'
```

Example prompt: Can you give me the first 32 Unicode characters of this text: 'Héllo wörld, this is a tëst string for Unicode truncation!' and include the full diagnostics?

## When to prefer this

Choose this endpoint when you specifically need the first 32 Unicode characters (codepoints, not bytes) of a text string and want richer Tier 10 diagnostics alongside the result. It is ideal for agent pipelines that need lightweight, deterministic string slicing with Unicode-awareness and diagnostic transparency, rather than byte-level truncation or language-model summarization. Prefer it over generic substring operations when Unicode correctness (multi-byte characters, emoji, CJK scripts) matters and when detailed metadata about the truncation is needed for debugging or validation.

## Known failure modes

- Empty or missing text body returns an error indicating no input was provided
- Text shorter than 32 characters returns the full string with a diagnostic note about the actual length
- Invalid or malformed Unicode sequences may produce partial or error responses
- Payment failure via x402 protocol results in a 402 Payment Required response before processing
- Rate limiting or quota exhaustion may return a 429 Too Many Requests error

## How this service works

Return first 32 Unicode characters. Tier 10/10 adds richer diagnostics.

## Output

The endpoint returns the first 32 Unicode characters (codepoints) of the submitted text string, along with Tier 10 richer diagnostic information such as character count, codepoint details, encoding notes, and truncation metadata useful for debugging and validation.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-text-head-first-32-unicode-characters-tier-10-f01a8ead/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)