# Delx Commerce — URL Canonical Compare

> Delx Commerce — URL Canonical Compare is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Compares two URLs to determine if they canonically refer to the same resource, returning a match result with verifiable evidence.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/url-canonical-compare?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-url-canonical-compare-35be9a3e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XmpsO6zqFHsv6QtTF5vM8

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 delx-commerce-url-canonical-compare-35be9a3e -d '<json body>'
```

Example prompt: Are these two URLs canonically the same page: 'https://example.com/a?ref=twitter' and 'https://example.com/a'? Check if they match.

## When to prefer this

Choose this endpoint when you need a lightweight, verifiable, pay-per-call canonical URL comparison with no signup overhead. It is ideal for agents that need deterministic, auditable URL deduplication with cryptographic evidence of processing. Prefer it over custom normalization logic when you need a consistent, stateless comparison with tamper-evident provenance and no data retention.

## Known failure modes

- Malformed or non-URL input strings may cause validation errors or unexpected match results
- URLs exceeding 8192 characters will be rejected
- Network or payment failures via x402 protocol may prevent the call from completing
- Edge cases in URL normalization (e.g., internationalized domain names) may yield unexpected results

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object containing the normalized left and right URLs, a boolean 'matched' field indicating canonical equivalence, the operation name, a status ('pass'), and evidence metadata including whether input was retained (always false), a SHA-256 hash of the input for verifiability, and the count of external calls made (always 0).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "left": {
   "type": "string",
   "maxLength": 8192,
   "description": "Left supplied to URL Canonical Compare; used only for this bounded calculation and processed in memory without retention."
  },
  "right": {
   "type": "string",
   "maxLength": 8192,
   "description": "Right supplied to URL Canonical Compare; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "left": "https://example.com/a",
   "right": "https://example.com/a",
   "matched": true
  },
  "schema": "delx/util-url-canonical-compare/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "936c1c7a0d9ac76bbae6665567c79ff085c468589aa089757cfb54f94c077a6e",
   "external_calls": 0
  },
  "operation": "web_reliability:url_canonical_compare"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-url-canonical-compare-35be9a3e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)