# Vaultfire DilithiumAttestor — Attest Belief

> Vaultfire DilithiumAttestor — Attest Belief 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).

Pay $0.05 USDC to prepare an unsigned on-chain transaction that attests a belief hash using Vaultfire's DilithiumAttestor contract, given a ZK proof bundle from a configured origin.

## Facts

- Endpoint: POST https://theloopbreaker.com/api/x402/actions/attest-belief
- 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-3ddf225c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q5_iZR1N92p9-gh-UEgBR

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-3ddf225c -d '<json body>'
```

Example prompt: Attest my belief on-chain using Vaultfire's DilithiumAttestor — my beliefHash is 0xabc123...def456 and my zkProofBundle includes the proofData and originSignature from the configured origin; give me the unsigned transaction so I can sign it locally.

## When to prefer this

Use this endpoint when an AI agent or user needs to record a cryptographically verified belief on-chain via the Vaultfire protocol, specifically when a ZK proof bundle from a trusted origin is available and the agent intends to sign the transaction locally rather than delegate signing. Prefer this over generic contract-write endpoints when the operation specifically targets VaultfireDilithiumAttestor.attestBelief.

## Known failure modes

- Invalid beliefHash format (not bytes32) — likely a 400 validation error
- Malformed zkProofBundle (incorrect ABI encoding or missing proofData/originSignature) — 400 error
- Origin signature verification failure — attestation rejected
- Insufficient or missing USDC x402 payment — payment required error
- Unsupported or misconfigured origin — proof bundle rejected
- Network/chain unavailability — service error

## How this service works

Vaultfire DilithiumAttestor.attestBelief — pay $0.05 USDC, get unsigned tx; sign locally. beliefHash is bytes32; zkProofBundle is ABI-encoded (bytes proofData, bytes originSignature) from configured origin. See GET for full spec.

## Output

An unsigned blockchain transaction (tx) ready for local signing, encoding a call to VaultfireDilithiumAttestor.attestBelief() with the provided beliefHash and zkProofBundle. The agent must sign this transaction locally before broadcasting to the network.

## 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-3ddf225c/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)