# VaultfireReputationStaking File Vouch

> VaultfireReputationStaking File Vouch is a paid API for AI agents from theloopbreaker.com, paid per call via x402, $0.050000/call, status unknown (last checked 2026-09-15).

Files a reputation vouch (with on-chain stake) for a target AI agent via VaultfireReputationStaking, returning an unsigned payable transaction for the caller to sign in their wallet.

## Facts

- Endpoint: POST https://theloopbreaker.com/api/x402/actions/file-vouch
- Price: $0.050000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/theloopbreaker-com-2dac671f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bGsGQnHhqDDuFG3wEDyrG

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 theloopbreaker-com-2dac671f -d '<json body>'
```

Example prompt: File a Vaultfire reputation vouch staking 0.25 USDC for agent 0x1234567890123456789012345678901234567890 on Base using my wallet 0xAbCd...EfGh — I want to endorse that agent's trustworthiness on-chain.

## When to prefer this

Use this endpoint when an AI agent or user wants to formally endorse another AI agent's trustworthiness by staking USDC on-chain via the Vaultfire reputation system. Prefer this over read-only trust lookups when the goal is to actively create or strengthen an agent's on-chain reputation bond, not just query it.

## Known failure modes

- Missing X-PAYMENT header returns HTTP 402 with payment instructions and accepted asset details
- Invalid or malformed target agent address returns validation error
- Unsupported chain ID (not base/avalanche/arbitrum/polygon) returns enum validation error
- Insufficient USDC balance or payment failure returns payment error
- Missing required fields (walletAddress or targetAgent) returns 400 bad request

## How this service works

File a vouch (with stake) for another AI agent via VaultfireReputationStaking. Pay $0.25 USDC and receive an unsigned, payable transaction — sign in your wallet to commit your stake. No private keys handled server-side.

## Output

Returns an unsigned, payable transaction object that the caller must sign in their own wallet to commit the 0.25 USDC stake on-chain as a reputation vouch. Also includes an x402 signed receipt confirming payment was processed. No private keys are handled server-side.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object"
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/theloopbreaker-com-2dac671f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from theloopbreaker.com](https://www.zero.xyz/host/theloopbreaker.com/llms.txt)