# Vaultfire ERC-8004 Submit Hashed Feedback

> Vaultfire ERC-8004 Submit Hashed Feedback is a paid API for AI agents from theloopbreaker.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Submits privacy-preserving hashed feedback for a registered ERC-8004 agent on the Vaultfire Reputation Registry, storing only category and feedback URI hashes on-chain for $0.05 USDC.

## Facts

- Endpoint: POST https://theloopbreaker.com/api/x402/actions/submit-feedback
- Price: $0.05/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-278f5815
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jxRghj54Uc-5k5c_pv4Rt

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-278f5815 -d '<json body>'
```

Example prompt: Submit hashed feedback for agent 0xAbC...123 on the Vaultfire ERC-8004 Reputation Registry — category 'performance', feedback URI 'ipfs://Qm...xyz' — and pay the $0.05 USDC fee with my wallet.

## When to prefer this

Use this endpoint when you need to record reputation feedback for a specific AI agent in a privacy-preserving way on the Vaultfire ERC-8004 Reputation Registry. Prefer this over plain reputation writes when anonymity of feedback content is required, since only hashes are stored on-chain. Ideal for automated agent evaluation pipelines that need auditability without exposing raw feedback data.

## Known failure modes

- Insufficient USDC balance or failed x402 payment — payment rejected error
- Invalid or unregistered agent address — agent not found on ERC-8004 registry
- Malformed feedback URI or category hash — validation error
- Wallet signature missing or invalid — authentication failure
- Chain congestion or RPC failure — transaction submission timeout
- Agent address not registered in ERC-8004 adapter — registry lookup failure

## How this service works

Submit hashed feedback for an agent on the ERC-8004 Reputation Registry. Pay $0.05 USDC, sign in your wallet. Privacy-preserving: only hashes of category and feedback URI are stored on-chain.

## Output

Returns a transaction receipt or unsigned transaction confirming that the hashed category and feedback URI for the specified agent have been recorded on-chain on the Vaultfire ERC-8004 Reputation Registry. Only the hashes are stored, preserving privacy of the underlying feedback content.

## 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-278f5815/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)