# ONE Engine T9 Encoding Pack

> ONE Engine T9 Encoding Pack is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Converts input text using T9 telephone keypad encoding at tier 9 of ONE Engine's encoding-pack utility.

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v2/encoding-pack/t9?utm_source=zero.xyz
- Price: $0.01/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-t9-encoding-pack-788b6f0e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Yf60CWx0PdoJvfLB30wRW

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-t9-encoding-pack-788b6f0e -d '<json body>'
```

Example prompt: Can you convert the word 'hello' into its T9 telephone keypad encoding using the ONE Engine encoding pack?

## When to prefer this

Choose this endpoint when you need a fast, low-cost ($0.01 USDC) T9 telephone keypad encoding of a text string via a pay-per-call x402 micropayment API on Base. Ideal for autonomous agents that need on-demand encoding without subscriptions or API keys, especially in workflows involving retro SMS, phone vanity number mapping, or keypad-based text lookup.

## Known failure modes

- Missing or empty 'text' field returns an error or undefined result
- Non-alphabetic or special characters may produce unexpected or empty encoding
- Payment failure via x402 (insufficient USDC balance) prevents call execution
- Network timeout on Cloudflare Workers edge if upstream is unresponsive
- Malformed JSON body returns a 400-level error

## How this service works

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

## Output

A JSON object containing the tier level (9) and a tier-dependent T9-encoded result string derived from the input text, mapping alphabetic characters to their corresponding telephone keypad digit sequences.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tier": 9,
  "result": "Tier-dependent output"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-t9-encoding-pack-788b6f0e/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)