# Signed Result Comparator

> Signed Result Comparator is a paid API for AI agents from phion.systems, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Compares multiple agent results and produces a cryptographically signed record of exact agreement or conflict evidence between them

## Facts

- Endpoint: POST https://phion.systems/v1/paid/trust/signed-result-comparator
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signed-result-comparator-d0065da1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9TqZvqGJ59D0kyuw0HRiy

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 signed-result-comparator-d0065da1 -d '<json body>'
```

Example prompt: Compare these three agent results for the same task and give me a signed certificate showing whether they all agree or where exactly they conflict.

## When to prefer this

Choose this endpoint when you need a tamper-evident, cryptographically signed record of agreement or disagreement between multiple agent outputs — particularly for audit compliance, dispute resolution, or safety checks before acting on agent recommendations. Prefer this over simple diff tools when the signed artifact itself is the deliverable.

## Known failure modes

- Malformed or missing result payloads return a validation error
- Fewer than two results provided may result in a comparison error
- Signing service unavailable returns a 5xx error
- Results in incompatible formats may fail comparison
- Payment not completed (x402) blocks the request

## How this service works

Compare multiple agent results and sign exact agreement or conflict evidence

## Output

A cryptographically signed document indicating either exact agreement among the compared results or detailed conflict evidence pinpointing where discrepancies occur, suitable for audit trails and trust verification in multi-agent pipelines.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signed-result-comparator-d0065da1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phion.systems](https://www.zero.xyz/host/phion.systems/llms.txt)