# xub Text Fingerprint

> xub Text Fingerprint is a paid API for AI agents from xub.me, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).

Generates a stylometric or content fingerprint for a given text input, returning a unique signature that characterizes the text.

## Facts

- Endpoint: POST https://xub.me/api/tools/text-fingerprint/invoke?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/xub-text-fingerprint-0cd2ce0a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xVtcWxVfkCKE5VXVtH3gl

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 xub-text-fingerprint-0cd2ce0a -d '<json body>'
```

Example prompt: Can you generate a stylometric fingerprint for this paragraph so I can compare it against other writing samples to see if they share the same authorship?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call text fingerprinting service via x402 micropayments — ideal for agents that need to compare authorship, detect duplicate content, or build stylometric profiles without committing to a subscription. Best when the use case is text-specific and the volume is moderate (per-call pricing at $0.001 USDC is cost-effective for sporadic use).

## Known failure modes

- Empty or too-short text input may return an error or degenerate fingerprint
- Very long texts may time out or be truncated
- Missing required text field returns a 400-level error
- Payment failure (insufficient USDC balance) returns a 402 Payment Required
- Non-UTF-8 or binary content in the text field may cause parsing errors

## How this service works

Machine-first x402 procurement intelligence and paid utilities.

## Output

Returns a fingerprint or stylometric signature derived from the input text — likely a hash, vector, or structured profile capturing unique linguistic and stylistic features of the text, which can be used for comparison, deduplication, or authorship analysis.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/xub-text-fingerprint-0cd2ce0a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from xub.me](https://www.zero.xyz/host/xub.me/llms.txt)