Devryno Merchant Feed Audit - share kit

One-line pitch:
Preflight a public merchant/product feed against live product pages before price, currency, or availability mismatches become crawler, marketplace, or commerce-agent problems.

Short post:
I built a tiny pay-per-use feed preflight tool: give it a public Google Merchant/RSS/Atom/CSV/TSV feed URL, pay 0.25 USDC on Base, and get JSON showing which rows match or mismatch the public product pages. It compares feed price, currency, and availability against JSON-LD, Open Graph, microdata, and visible page signals. Useful before Google Merchant Center resubmits, Shopify/WooCommerce theme changes, marketplace feeds, affiliate feeds, or commerce-agent crawls.

URLs:
- Use case: https://devryno.com/use-cases/google-merchant-center-price-mismatch
- Free feed preview: https://devryno.com/free/merchant-feed-preview?url=https%3A%2F%2Fdevryno.com%2Fexamples%2Fgoogle-merchant-feed.xml&limit=2
- Checkout: https://devryno.com/buy/merchant-feed-audit
- Quote API: https://devryno.com/quote/merchant-feed-audit?url=https%3A%2F%2Fdevryno.com%2Fexamples%2Fgoogle-merchant-feed.xml&limit=2
- Claim API: https://devryno.com/claim/merchant-feed-audit?url={public-product-feed-url}&limit={1-10}&tx={base-transaction-hash}
- x402 API: https://devryno.com/pay/merchant-feed-audit?url={public-product-feed-url}&limit={1-10}
- Diagnostic order brief: https://devryno.com/briefs/merchant-feed-audit-diagnostic-order.txt
- Sample feed: https://devryno.com/examples/google-merchant-feed.xml
- Sample JSON: https://devryno.com/examples/merchant-feed-audit.json
- OpenAPI: https://devryno.com/openapi.json
- Google Merchant price mismatch docs: https://support.google.com/merchants/answer/9773429?hl=en-GB
- Google Merchant structured data docs: https://support.google.com/merchants/answer/7331077?hl=en
- Google automatic item updates docs: https://support.google.com/merchants/answer/12157888?hl=en

Price:
- 0.25 USDC on Base through normal transaction-hash checkout, or x402 exact payment.

Who it is for:
- Shopify/WooCommerce merchants after price, theme, market, currency, or variant changes.
- Feed generators and ecommerce ops before Merchant Center, marketplace, or affiliate feed submission.
- SEO/product-data consultants who need quick public evidence without a monthly crawler account.
- Commerce agents that need cheap confidence before quoting product data.

Not a fit:
- Private store admin access.
- Guaranteed Google Merchant Center approval.
- Full-site crawling; this checks up to 10 feed rows per paid request.

Suggested directory title:
Merchant Feed Audit - product feed vs landing page mismatch preflight

Suggested directory description:
Devryno Merchant Feed Audit fetches a public Google Merchant/RSS/Atom/CSV/TSV product feed, parses up to 10 rows, and compares feed price, currency, and availability with public product-page signals from JSON-LD, Open Graph, microdata, and visible text. Pay 0.25 USDC on Base per audit; no account required.