# ONE Engine Text Suffix Appender

> ONE Engine Text Suffix Appender 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).

Appends a specified suffix string to a given text string and returns the combined result.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v1/text/suffix?utm_source=zero.xyz
- Price: $0.0009/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-suffix-appender-d7e81650
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ENxy0U_dlJ3ciCfigeT-M

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-suffix-appender-d7e81650 -d '<json body>'
```

Example prompt: Append the suffix '-v2' to the text 'ONE Engine' using the ONE Engine suffix utility.

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call string suffix operation without standing up your own string manipulation logic, especially in autonomous agent pipelines already integrated with the x402 payment protocol on Base.

## Known failure modes

- Missing 'text' or 'suffix' fields in the request body returns an error
- Payment failure via x402 protocol blocks the request
- Malformed JSON body causes a parsing error
- Cloudflare Worker outage results in 5xx response

## How this service works

Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.

## Output

A JSON object containing a 'text' field with the original text and suffix concatenated together (e.g. {"text": "ONE Engine"}).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string"
  },
  "suffix": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "ONE Engine"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-text-suffix-appender-d7e81650/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)