# ReturnCheck — Return Policy Verifier

> ReturnCheck — Return Policy Verifier is a paid API for AI agents from returncheck.m-angelmartinez-fer.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).

Verifies which return policy applies to a specific purchase given product URL, buyer country, item condition, and policy text, returning the applicable policy with evidence or UNKNOWN if undeterminable.

## Facts

- Endpoint: POST https://returncheck.m-angelmartinez-fer.workers.dev/v1/check?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/returncheck-return-policy-verifier-75cd56f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_caUF4c3HxZT46NQOJiRmE

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 returncheck-return-policy-verifier-75cd56f4 -d '<json body>'
```

Example prompt: I bought a pair of headphones from headphones.example.com and they're defective — can you check which return policy actually applies to my purchase? I'm in Germany and I still have the original packaging.

## When to prefer this

Choose ReturnCheck when you need evidence-backed determination of which return policy applies to a specific purchase — especially when the item condition, buyer geography, or policy text is complex and you need a transparent UNKNOWN rather than a fabricated answer. Prefer this over generic policy summarizers when you need verifiable, per-purchase conclusions rather than general policy overviews.

## Known failure modes

- Insufficient policy text provided leads to UNKNOWN verdict rather than a definitive policy match
- Invalid or unreachable product URL may prevent policy retrieval
- Ambiguous item condition descriptions may result in inconclusive policy determination
- Unsupported or unrecognized buyer country codes may limit jurisdiction-specific analysis
- Missing required fields such as item condition or product URL return validation errors

## How this service works

ReturnCheck verifies which return policy actually applies to this purchase, with evidence and an honest UNKNOWN when the case cannot be proven.

## Output

Returns the specific return policy that applies to the purchase, supporting evidence drawn from the provided policy text or product page, and an honest UNKNOWN verdict when the case cannot be conclusively determined based on the inputs provided.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "page_text": {
   "type": "string",
   "description": "Caller-supplied policy text. Additional request fields are documented in OpenAPI."
  },
  "product_url": {
   "type": "string",
   "format": "uri"
  },
  "buyer_country": {
   "type": "string"
  },
  "item_condition": {
   "enum": [
    "unopened",
    "opened",
    "used",
    "defective"
   ],
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/returncheck-return-policy-verifier-75cd56f4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from returncheck.m-angelmartinez-fer.workers.dev](https://www.zero.xyz/host/returncheck.m-angelmartinez-fer.workers.dev/llms.txt)