REST API v1

Build with seller intelligence data.

Access Amazon product data, sales estimates, keyword research and market analytics programmatically. Integrate Seller Niche intelligence into internal dashboards, workflows and seller apps.

Explore endpoints View authentication

BASEhttps://sellerniche.com/api/v1

10API endpoints across research, AI and profit workflows

9Amazon marketplaces supported for product search

2,000Business plan daily requests

Developer console

Product Search200 OK

# Search Amazon products by keyword
curl -H "X-API-Key: niche_xxx" \
  "https://sellerniche.com/api/v1/search?keyword=yoga+mat&marketplace=amazon.com"

48Total results

7/10Niche score

12.5KMonthly sales

Authentication

Simple keys. Clear limits.

Use X-API-Key or Bearer authentication, then scale request limits by plan as your research workflow grows.

Authenticate every request.

All API requests require an API key. Include it as a header or as a Bearer token depending on your integration style.

Option 1 - HeaderX-API-Key: niche_your_key_here

Option 2 - Bearer tokenAuthorization: Bearer niche_your_key_here

100

Starter

Daily requests for early integrations and lightweight product research.

500

Pro

Higher limits for production research flows and seller dashboards.

2,000

Business

Best fit for teams, agencies, API access and larger automation loops.

Endpoint library

Research, rank, price and automate.

Start with the full API surface, then open the endpoint reference when you need request parameters, examples and error handling.

Product Search

Search Amazon products by keyword across supported marketplaces.

GET/api/v1/search

Product Detail

Return ASIN-level title, brand, price averages, BSR, rating and review metrics.

GET/api/v1/product?asin=

Price History

Read price movement and product trend context over time.

GET/api/v1/price-history

BSR History

Track best-seller-rank changes and demand velocity.

GET/api/v1/bsr-history

Sales Estimate

Monthly sales estimate from an ASIN or a raw BSR, with a confidence range.

GET/api/v1/sales-estimate

Niche Score

Score a keyword's market: price, review depth, rating and price spread.

GET/api/v1/niche-score

Competitor Analysis

Competing listings for a keyword plus brand share and competition level.

GET/api/v1/competitors

Category & Best Sellers

Browse the category list, or pull a category's top 20 best sellers.

GET/api/v1/category

Keyword Suggestions

Measured keyword expansion from DataForSEO. Answers 404 rather than inventing keywords when there is no data.

POST/api/v1/keywords

Profit Calculator

Calculate fees, margins and estimated profitability for a product.

POST/api/v1/profit-calc

Reference

Product Search endpoint.

Use this reference to build product search flows with clear parameters, request examples, response fields and error states.

GET /api/v1/search

GET

Search Amazon products by keyword across the 17 Amazon domains the v1 API accepts. The response returns product candidates, opportunity scoring and core sales metrics.

Parameters

keywordstringrequired

Search keyword.

marketplacestringoptional

amazon.com, amazon.co.uk, amazon.de, amazon.fr, amazon.co.jp, amazon.ca, amazon.it, amazon.es, amazon.in, amazon.com.mx, amazon.com.br, amazon.com.au, amazon.nl, amazon.se, amazon.pl, amazon.sg, amazon.com.be. Default: amazon.com.

pageintegeroptional

Page number. Default: 1.

cURLNodePython

curl -H "X-API-Key: niche_xxx" \
  "https://sellerniche.com/api/v1/search?keyword=yoga+mat&marketplace=amazon.com"

Example Response

success: true

{
  "success": true,
  "data": {
    "keyword": "yoga mat",
    "marketplace": "amazon.com",
    "totalResults": 20,
    "nicheScore": {
      "demand": 61,
      "competition": 48,
      "opportunity": 52,
      "score": 54
    },
    "products": [{
      "asin": "B07JNB3CYK",
      "title": "Premium Yoga Mat...",
      "brand": "BalanceFrom",
      "price": 19.99,
      "bsr": 245,
      "monthlySales": 12500,
      "reviewCount": 85000,
      "rating": 4.5
    }]
  }
}

Error Codes

400Missing required parameters.

401Missing or invalid API key.

403Plan does not include API access.

404Resource not found.

429Daily rate limit exceeded.

500Internal server error.

Integration paths

Make the API feel production-ready.

Where the API fits, who uses it and what to build first.

Internal dashboards

Pipe product search, Niche Score and sales estimates into your own research views.

Agency reporting

Automate client exports, opportunity snapshots and marketplace research summaries.

AI workflows

Feed keyword and market data into ScribeAI, listing optimization and PPC decision loops.

There is no official SDK package yet — the API is plain REST with a Bearer (or X-API-Key) header, so the snippets above work as-is. To try every endpoint at once, import the Postman collection and set the apiKey variable.

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