# Agent Referee Multi-Part Sealed Review (3x3)

> Agent Referee Multi-Part Sealed Review (3x3) is a paid API for AI agents from agentreferee.ai, paid per call via x402, $0.7/call, status unknown (last checked 2026-10-31).

Submits a work split into 3 parts (up to 12,000 chars each) for independent parallel review by 3 AI judges from different companies, returning a majority verdict with signed, hashed receipts per part.

## Facts

- Endpoint: POST https://agentreferee.ai/review-3x3?utm_source=zero.xyz
- Price: $0.7/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-referee-multi-part-sealed-review-3x3-d6c6bb7e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OCja0fJd2sb-Qpvw3RZt0

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 agent-referee-multi-part-sealed-review-3x3-d6c6bb7e -d '<json body>'
```

Example prompt: Run a sealed 3x3 Agent Referee review on this research report I've split into three parts — have three independent AI judges from different companies each read all parts without seeing each other's verdicts, then give me the majority verdict and the signed receipts with each part's hash.

## When to prefer this

Choose this endpoint when you need to review a long piece of work (up to 36,000 characters) that benefits from being split into logical parts, and you require tamper-proof, independently-sealed verdicts from multiple AI providers rather than a single model's opinion. Ideal when cryptographic receipts and majority-rule arbitration matter, such as for contracts, academic papers, or high-stakes content evaluation.

## Known failure modes

- Review does not complete (e.g. one or more judges fail) — no charge is made and an error is returned
- Input parts exceed 12,000 characters each or 36,000 total — submission rejected
- Payment fails or insufficient USDC balance — review not initiated
- Network or provider timeout during parallel judge calls — incomplete review returned without charge

## How this service works

Agent Referee multi-part sealed review — one piece of work in 3 pieces (up to 12000 characters each, 36000 in all): three independent AI reviewers from three different companies each read every piece in one call, in parallel, without seeing each other's verdicts; majority verdict, every vote in a signed receipt with each piece's hash. One agent, one call; charged only if the review completes.

## Output

A majority verdict from three independent AI judges (from different companies), along with each judge's individual vote, and a signed cryptographic receipt for each of the three parts containing that part's hash — confirming review integrity and completion.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-referee-multi-part-sealed-review-3x3-d6c6bb7e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentreferee.ai](https://www.zero.xyz/host/agentreferee.ai/llms.txt)