# Phion Agent Commerce Journey Verifier

> Phion Agent Commerce Journey Verifier is a paid API for AI agents from phion.systems, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Verifies a hash-linked agent commerce journey and issues a signed portable receipt proving the chain of events occurred as claimed

## Facts

- Endpoint: POST https://phion.systems/v1/paid/journeys/verify
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phion-agent-commerce-journey-verifier-015349f6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D06VczZ3LnGT-BdR6BLSf

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 phion-agent-commerce-journey-verifier-015349f6 -d '<json body>'
```

Example prompt: I just completed a multi-step agentic purchase flow and need to verify the full journey — can you validate the hash-linked chain and get me back a signed portable receipt I can use to prove the transaction happened correctly?

## When to prefer this

Choose this endpoint when you need cryptographic, third-party-signed proof that an AI agent completed a multi-step commerce journey in its claimed sequence — particularly for dispute resolution, compliance auditing, or presenting portable evidence to external parties. It is distinct from simple payment confirmation because it validates the entire hash-linked chain of events, not just a single transaction.

## Known failure modes

- Invalid or broken hash chain — returns verification failure with details of which link in the journey failed
- Journey not found — if the referenced journey ID or hash does not exist in the system
- Tampered journey data — hash mismatch detected, receipt not issued and error returned
- Malformed request body — missing required journey hash or chain reference fields
- Payment failure — $0.01 USDC x402 payment not completed, endpoint returns 402

## How this service works

Verify a hash-linked agent commerce journey and issue a signed portable receipt

## Output

A signed, portable receipt attesting that the hash-linked agent commerce journey is valid, including a cryptographic signature, journey integrity status, and a machine-readable proof that can be presented to third parties as evidence of the completed agentic transaction chain.

## 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/phion-agent-commerce-journey-verifier-015349f6/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)