Tactics for sellers and builders
Real workflows, post-mortems, retailer-data deep dives, and integration guides.
- Integrations
Building an AI shopping agent with retailerapi MCP (2026 guide)
Five-minute walkthrough. Working agent that compares Walmart vs Amazon vs eBay prices and explains the spread. Real prompts, real outputs.
·5 min read - Sourcing
Cross-retailer arbitrage workflows that work in 2026
Five workflows. Real margin math. Walmart-to-Amazon, Lowe's-to-Walmart, online-to-Walmart, retail-to-online, brand-direct. What actually works in 2026.
·6 min read - Engineering
Why Google killed GTIN search on Shopping (and what we did about it)
Google killed GTIN/UPC search on Shopping in 2024. Title-based search still returns multi-retailer offers in one call. Here's the workaround we built.
·5 min read - Comparisons
Keepa alternatives for Walmart, eBay, and beyond (2026)
Side-by-side: retailerapi vs Keepa vs CamelCamelCamel vs PriceBlink vs ShopSavvy. Pricing, retailer coverage, API access, and the right pick by use case.
·5 min read - Integrations
Using the retailerapi MCP server in Claude Desktop, Claude Code, and Cursor
60-second setup. Six tools. Real product data inside Claude Desktop, Claude Code, and Cursor. The fastest way to give an AI agent retailer pricing.
·4 min read - How-tos
UPC vs EAN vs GTIN vs ASIN: a 2026 product-identifier guide for sellers and developers
UPC-A, UPC-E, EAN-13, ISBN, GTIN-14, ASIN, walmart_item_id. What they mean, when they overlap, and the bugs that hit when you treat them as one thing.
·6 min read - SEO
The pSEO playbook for product-data sites in 2026
100,000 product pages doesn't have to look thin. Here's the AEO-compliant pSEO playbook we used to launch retailerapi.com: schema, llms.txt, sitemap chunks, content density.
·8 min read - How-tos
Repricing on Walmart Marketplace in 2026: cadence, signals, and tooling
Walmart buy-box rotates 1-3x per week vs Amazon's 7-15x. Here's the optimal repricer cadence, signal sources, and tools that actually work in 2026.
·2 min read - Engineering
Inside retailerapi: cross-retailer enrichment, time-series storage, and stale-while-revalidate at scale
How we serve cross-retailer pricing for less than $7 per 100k page views. The Tier 0 / Tier 1 dispatch, Postgres advisory locks, time-series schema split, and the bot-defense story.
·8 min read - How-tos
Walmart Marketplace seller analysis with retailerapi: a 2026 sourcing playbook
30-minute playbook. Pull seller profiles, identify buy-box owners, find sourcing opportunities. Real script + real numbers from a power-tool category run-through.
·4 min read - How-tos
How to track Walmart price history: 3 methods compared (2026)
Walmart hides price history. Three working methods in 2026: manual capture, Keepa's Walmart tier, retailerapi. Cost, freshness, and integration effort compared.
·5 min read - Sourcing
Walmart Marketplace vs Amazon for new sellers in 2026: a real comparison
Side-by-side: fees, approvals, traffic, fulfillment, returns. Honest answer on which marketplace makes sense for a new seller in 2026.
·6 min read - Positioning
Why retailerapi exists (and what we deliberately don't try to do)
Keepa is the gold standard for Amazon. Walmart, Target, Lowe's, Home Depot have no equivalent. Here's what retailerapi is, what it isn't, and why the founder built it.
·5 min read