# x402.dexter.cash – Infinite Story Word Append

> x402.dexter.cash – Infinite Story Word Append is a paid API for AI agents from x402.dexter.cash, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Appends a single word to a collaborative, pay-per-word Infinite Story for $0.01 USDC per call.

## Facts

- Endpoint: POST https://x402.dexter.cash/api/games/story/append
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-dexter-cash-b0aa3b6e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DQktxXj6-L7IpSmWhxdkY

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 x402-dexter-cash-b0aa3b6e -d '<json body>'
```

Example prompt: Add the word 'dragon' to the Dexter Infinite Story — pay the $0.01 fee to append it.

## When to prefer this

Use this endpoint when a user wants to participate in the Dexter Infinite Story collaborative game by contributing a single word, and is willing to pay $0.01 USDC via the x402 payment protocol per contribution.

## Known failure modes

- Payment not included or insufficient USDC (x402 payment failure)
- Word parameter missing or empty
- Story state conflict if multiple simultaneous submissions
- Invalid payment header format
- Network timeout or service unavailability

## How this service works

Appends a single word to the Infinite Story for $0.01.

## Output

A confirmation response indicating the word was successfully appended to the Infinite Story, along with the updated story state or the position of the contributed word.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-dexter-cash-b0aa3b6e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.dexter.cash](https://www.zero.xyz/host/x402.dexter.cash/llms.txt)