# Delx Title Case

> Delx Title Case is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).

Converts a string to title case formatting via a pay-per-use API, returning structured JSON output for $0.001 USDC per call.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/title-case?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-title-case-c05bf40a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vsRTpo96g4o-pHkvM9IPR

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 delx-title-case-c05bf40a -d '<json body>'
```

Example prompt: Can you title-case this string for me: 'the quick brown fox jumps over the lazy dog'?

## When to prefer this

Choose this endpoint when your agent needs deterministic title-case formatting inside a workflow without installing an NPM/PyPI library, managing an API key subscription, or writing custom capitalization logic. It is ideal for serverless or sandboxed agent environments where dependencies are restricted, and for one-off or low-volume formatting tasks where a $0.001 pay-per-use model is more cost-effective than a subscription. It differs from the sibling Delx Sentence Case endpoint, which applies sentence-level rather than word-level capitalization.

## Known failure modes

- Input text exceeds 100,000 character limit — request rejected with a validation error
- Payment of $0.001 USDC not completed or x402 handshake fails — result not returned
- Empty or missing `text` field in request body — may return an error or empty result
- Malformed JSON request body — returns a parsing or validation error
- Network timeout or service unavailability — connection error with no result

## How this service works

Title-case text for agents. Call this when you need headline-ready casing for titles, product names, or UI labels mid-workflow. Returns structured JSON with the title-cased string and a tiny receipt schema. $0.001 USDC per successful call via x402 on Base or Solana—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.

## Output

A structured JSON object containing the title-cased version of the input string, returned synchronously after a successful $0.001 USDC micropayment via x402.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 100000,
   "description": "Primary text input (max 100k chars). Processed first-party; not retained as a dataset."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "Hello Agent World",
  "schema": "delx/title-case/v1",
  "source_len": 17
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-title-case-c05bf40a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)