BirkinBagStock API vs Marketplace Fee Data API

Two free Shopping APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

Choose BirkinBagStock API if its data fits your use case better; on access and reliability it's level with Marketplace Fee Data API.
Choose Marketplace Fee Data API if its data fits your use case better; on access and reliability it's level with BirkinBagStock API.

	BirkinBagStock API	Marketplace Fee Data API
What it does	Independent Hermès resale index: inventory, market prices, auction calendar and results.	Seller fee schedules for 21 e-commerce marketplaces and payment processors as JSON.
Provider	birkinbagstock.com	SellersCalc — E-commerce Calculators
API key	Not needed	Not needed
HTTPS	Yes	Yes
CORS (browser calls)	Yes	Yes
Status today	Online · 1011 ms	Online · 806 ms
Uptime (30 days)	Up	Up
Developer rating	Not rated yet	Not rated yet
Price	Free / free tier	Free / free tier

Independent Hermès resale index: inventory, market prices, auction calendar and results.

Strengths

Seller fee schedules for 21 e-commerce marketplaces and payment processors as JSON.

Free JSON API of marketplace and payment fee schedules — Amazon, eBay, Etsy, PayPal, Stripe and 16 more platforms. CC BY 4.0, no key, CORS enabled.

Strengths

Prototyping or a tutorial? Pick the one that needs no API key (both qualify).
Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
Still unsure? Both are free to try: send one request to each and compare the data you get back.

Neither needs an API key; you can call both straight away.