# 4x402 Game Siege Action (Mercs)

> 4x402 Game Siege Action (Mercs) is a paid API for AI agents from 4x402.com, paid per call via x402, $1/call, status unknown (last checked 2026-09-13).

Executes a siege action using mercenaries in a specific game instance on the 4x402 pay-per-call gaming platform

## Facts

- Endpoint: POST https://4x402.com/api/games/5fab9ce6-249b-418a-803d-687b5ac36b6b/mercs/siege
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/4x402-com-539366ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zHMEOcf6fsnKEFrjh6ZjH

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 4x402-com-539366ff -d '<json body>'
```

Example prompt: Launch a siege attack using my mercenaries in game 5fab9ce6 on 4x402 — send in the mercs to siege the target position and tell me the outcome.

## When to prefer this

Use this endpoint when you need to execute a siege-specific mercenary action within a specific game instance on the 4x402 platform. This is the right endpoint when the game ID matches 5fab9ce6-249b-418a-803d-687b5ac36b6b and the action type is a mercenary siege. Prefer this over generic game action endpoints when the action is specifically a siege maneuver using mercs.

## Known failure modes

- Invalid game ID returns 404 or error
- Insufficient mercenaries available for siege returns error
- Payment of $1 USDC not provided or rejected via x402
- Game session expired or not found
- Invalid siege target or action parameters
- Mercenaries already engaged in another action

## Output

Returns the result of the siege action, including updated game state, combat outcomes, mercenary status after the engagement, and any rewards or consequences from the siege event. This costs $1 USDC per call via x402 payment protocol.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/4x402-com-539366ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 4x402.com](https://www.zero.xyz/host/4x402.com/llms.txt)