Yes, Amazon SP-API is completely free. You just need an Amazon Seller account. No extra charge in niche.ltd.

Can I use without SP-API?

Yes, SP-API is optional. Keepa data works on its own. Adding SP-API increases accuracy from 90% to 99%.

Which marketplaces are supported?

19 Amazon marketplaces: US, CA, MX, BR, UK, DE, FR, IT, ES, TR, NL, SE, PL, JP, AU, SG, IN, AE, SA.

How long does approval take?

Amazon SP-API app approval usually takes 1-3 business days. With Self-Authorization you can use it instantly.

⚡Amazon SP-API

Get data directlyfrom Amazon.

Get Buy Box price, FBA fees, product dimensions, seller count and category restrictions directly from Amazon via SP-API integration. Enrich Keepa data with SP-API for 99% accuracy.

Connect SP-API View Plans →

Free Amazon API · No extra cost

99%

Price accuracy

Extra cost

Amazon marketplaces

niche.ltd

⚡

🏷️Buy Box price

📦FBA fee calculation

📐Product dimensions

👥Seller count

🔒Restriction check

The problem

Why SP-API matters.

Third-party data sources aren't always accurate — Amazon's own data is the most reliable.

📉

Price accuracy issues

Keepa and similar tools provide ~90% accuracy. Buy Box price often differs. SP-API gives 99% accuracy.

💰

FBA fees unknown

Can't calculate profit accurately without knowing FBA referral, fulfillment and storage fees.

🚫

Restricted categories

You need to know if there are selling restrictions before investing in a gated category product.

Features

Amazon's own data.

🏷️

Buy Box price

Real-time Buy Box price directly from Amazon. More accurate than Keepa.

📦

FBA fee calculation

Referral fee, fulfillment fee, storage fee — real numbers directly from Amazon.

📐

Product dimensions

Package size, weight — FBA size tier calculation and shipping cost estimation.

👥

Seller count

How many new/used sellers — critical data for competition analysis.

🔒

Restriction check

Automatically detect gated/restricted products. Know before you invest.

📊

Keepa + SP-API combined

365-day price history (Keepa) + real-time Buy Box & fees (SP-API). Best combo.

How it works?

1️⃣

Create app in Seller Central

Create a new app with Self-Authorization in the Develop Apps section.

2️⃣

Get credentials

Client ID, Client Secret and Refresh Token — 3 pieces of info is enough.

3️⃣

Enter SP-API settings

Enter credentials in the SP-API Settings page in niche.ltd panel. Connection is tested.

Related Tools

Stock forecast engine

Frequently Asked Questions

Start with 99% accurate data.

Amazon SP-API is free, setup takes 5 minutes. Keepa + SP-API = most accurate data.

Connect SP-API See Plans