# ONE Engine Text Transform Pack Tier 4

> ONE Engine Text Transform Pack Tier 4 is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0018/call, status unknown (last checked 2026-10-02).

Applies a tier-4 text transformation to a given input string via a pay-per-call API on Base using x402.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/text-transform-pack/t4?utm_source=zero.xyz
- Price: $0.0018/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-transform-pack-tier-4-7029385f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UO9aNut3BYv_Fcxni0i7o

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-transform-pack-tier-4-7029385f -d '<json body>'
```

Example prompt: Run my text through ONE Engine's tier-4 text transform: 'The quarterly report shows declining margins but strong customer retention metrics.' and give me the transformed output.

## When to prefer this

Choose this endpoint when you need a low-cost, pay-per-call text transformation via x402 micropayments on Base and specifically want the tier-4 processing level from ONE Engine's transform pack. Suitable for autonomous agents that need to embed text processing into automated workflows without subscription overhead.

## Known failure modes

- Payment failure or insufficient USDC balance via x402 returns a 402 Payment Required error
- Empty or missing 'text' field in request body may return a 400 Bad Request
- Excessively long text strings may be rejected or truncated
- Network or Cloudflare Worker availability issues may cause 5xx errors
- Ambiguous tier behavior: 'Tier-dependent output' is underspecified so actual transformation type is unknown without testing

## How this service works

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

## Output

A JSON object containing a 'tier' field (integer, value 4) and a 'result' field with the tier-dependent transformed version of the input text string.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 4,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-text-transform-pack-tier-4-7029385f/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)