Name: Amazon Keyword Research API: Reverse ASIN, Volume
Brand: steadyscrape
SKU: api-steadyscrape-amazon-keyword-research
Availability: InStock
Author: API Market

# Amazon Keyword Research API

## Overview

The Amazon Keyword Research API gives Amazon sellers and tools three keyword endpoints: reverse ASIN (the keywords a product ranks for), related Amazon search terms for a seed keyword, and Amazon monthly search volume for up to 50 keywords per call across 16 marketplaces. Reverse ASIN and related keywords also return volume, so you can rank opportunities right away.

It is built for Amazon sellers, listing optimisation tools, PPC agencies and product research apps. Reverse ASIN rows carry the keyword, search volume, organic rank, the product's title, price, rating and reviews, and badges such as Best Seller and Amazon's Choice. Volume rows carry the keyword, monthly volume and marketplace.

## Features

*   **Three endpoints**: reverse ASIN, related keywords and keyword volume.
*   **Bulk volume**: up to 50 keywords per call on `/v1/amazon/keyword-volume`.
*   **Marketplaces**: 16 Amazon marketplaces for volume, set with `marketplace`.
*   **Rank filters**: `min_volume`, `max_volume` and `max_rank` on reverse ASIN.
*   **Product context**: price, rating, reviews, bought in past month and badges on reverse ASIN rows.
*   **Rate limit**: 1 request per second on Free, Starter and Business, 2 on Pro.

## Use Cases

*   **Listing optimisation**: find the search terms a competitor ranks for and add them to your listing.
*   **PPC campaigns**: build keyword lists with volume for sponsored product ads.
*   **Product research**: size demand for a niche before sourcing.
*   **SEO tools**: add Amazon volume to a keyword research product.

## API Documentation

### Base URL

All requests go through the API.market proxy at this base URL:

```
https://prod.api.market/api/v1/steadyscrape/amazon-keyword-research
```

### Authentication

Every request needs your API.market key in the `x-api-market-key` header:

```
x-api-market-key: YOUR_API_KEY
```

Replace `YOUR_API_KEY` with your actual API key.

### Endpoints

#### 1. Reverse ASIN keywords

Returns the keywords an Amazon product ranks for, with search volume, organic rank and the product's details.

**Method:** `GET`

**Endpoint:** `/v1/amazon/reverse-asin`

**Parameters:**

| Name | In | Description | Type | Required | Default | Max Value |
|---|---|---|---|---|---|---|
| `asin` | query | One ASIN (10 characters, like B00FLYWNYQ) or an Amazon product link. | string | Yes | - | - |
| `marketplace` | query | Amazon marketplace: US, AE, SA, EG. | string | No | `US` | - |
| `min_volume` | query | Only keywords with at least this monthly search volume. | integer | No | - | 100000000 |
| `max_volume` | query | Only keywords with at most this monthly search volume. | integer | No | - | 100000000 |
| `max_rank` | query | Only keywords where the product ranks at this organic position or better. | integer | No | - | 700 |
| `limit` | query | Maximum number of keywords to return (1-50). Default 25. | integer | No | `25` | 50 |

**Example Request:**

```bash
curl -X GET 'https://prod.api.market/api/v1/steadyscrape/amazon-keyword-research/v1/amazon/reverse-asin?asin=B00FLYWNYQ&marketplace=US&limit=5' \
  -H 'x-api-market-key: YOUR_API_KEY'
```

**Example Response (200 OK):**

```json
{
  "success": true,
  "endpoint": "amazon.reverseAsin",
  "count": 5,
  "partial": false,
  "items": [
    {
      "keyword": "sale",
      "searchVolume": 448912,
      "asin": "B00FLYWNYQ",
      "organicRank": 23,
      "rankAbsolute": 24,
      "resultType": "amazon_serp",
      "productTitle": "Duo 6 Qt 7-in-1 Electric Pressure Cooker, Stainless Steel",
      "price": 109.99,
      "currency": "USD",
      "rating": 4,
      "reviews": 184500,
      "isBestSeller": false,
      "isAmazonChoice": false,
      "boughtPastMonth": 10000,
      "searchResultsCount": 176025,
      "serpItemTypes": [
        "amazon_serp",
        "amazon_paid"
      ],
      "rankSeenAt": "2026-09-16",
      "volumeUpdatedAt": "2026-10-03",
      "marketplace": "US"
    }
  ],
  "meta": {
    "generatedAt": "2026-10-29T04:50:13.009Z",
    "tookMs": 2814,
    "version": "1.0.0"
  }
}
```

#### 2. Related keywords

Returns Amazon search terms related to a seed keyword, each with its monthly search volume.

**Method:** `GET`

**Endpoint:** `/v1/amazon/related-keywords`

**Parameters:**

| Name | In | Description | Type | Required | Default | Max Value |
|---|---|---|---|---|---|---|
| `keyword` | query | One seed keyword, for example french press. | string | Yes | - | - |
| `marketplace` | query | Amazon marketplace: US, AE, SA, EG. | string | No | `US` | - |
| `limit` | query | Maximum number of keywords to return (1-50). Default 25. | integer | No | `25` | 50 |

**Example Request:**

```bash
curl -X GET 'https://prod.api.market/api/v1/steadyscrape/amazon-keyword-research/v1/amazon/related-keywords?keyword=coffee%20grinder&marketplace=US&limit=5' \
  -H 'x-api-market-key: YOUR_API_KEY'
```

**Example Response (200 OK):**

```json
{
  "success": true,
  "endpoint": "amazon.relatedKeywords",
  "count": 4,
  "partial": false,
  "items": [
    {
      "keyword": "coffee",
      "searchVolume": 556699,
      "seedKeyword": "coffee grinder",
      "relatedDepth": 1,
      "volumeUpdatedAt": "2026-10-03",
      "marketplace": "US"
    }
  ],
  "meta": {
    "generatedAt": "2026-10-29T04:50:09.993Z",
    "tookMs": 3182,
    "version": "1.0.0"
  }
}
```

#### 3. Keyword search volume

Returns Amazon monthly search volume for a comma-separated list of up to 50 keywords.

**Method:** `GET`

**Endpoint:** `/v1/amazon/keyword-volume`

**Parameters:**

| Name | In | Description | Type | Required | Default | Max Value |
|---|---|---|---|---|---|---|
| `keywords` | query | Keywords, comma separated (1-50). Up to 50 values. | string | Yes | - | - |
| `marketplace` | query | Amazon marketplace: US, UK, CA, DE, FR, IT, ES, NL, AT, IN, AU, MX, AE, SA, EG, SG. | string | No | `US` | - |

**Example Request:**

```bash
curl -X GET 'https://prod.api.market/api/v1/steadyscrape/amazon-keyword-research/v1/amazon/keyword-volume?keywords=coffee%20grinder,burr%20grinder&marketplace=US' \
  -H 'x-api-market-key: YOUR_API_KEY'
```

**Example Response (200 OK):**

```json
{
  "success": true,
  "endpoint": "amazon.keywordVolume",
  "count": 2,
  "partial": false,
  "items": [
    {
      "keyword": "coffee grinder",
      "searchVolume": 41401,
      "marketplace": "US"
    }
  ],
  "meta": {
    "generatedAt": "2026-10-29T04:49:24.660Z",
    "tookMs": 4481,
    "version": "1.0.0"
  }
}
```

## Status Codes

| Code | Status | Description |
|---|---|---|
| 200 | OK | The request worked. The body has `success`, `endpoint`, `count`, `partial`, the `items` array and a `meta` block. |
| 400 | Bad Request | A required parameter is missing or a value is out of range. The body explains which parameter. |
| 401 | Unauthorized | The `x-api-market-key` header is missing or the key is not valid. |
| 403 | Forbidden | Your key has no active subscription to this API, or your plan quota is used up. |
| 404 | Not Found | The path is wrong. This API has three endpoints: `/v1/amazon/reverse-asin`, `/v1/amazon/related-keywords` and `/v1/amazon/keyword-volume`. |
| 429 | Too Many Requests | You went over your plan's requests per second. The body has `retryAfterMs`, and `Retry-After` says how long to wait. |
| 500 | Internal Server Error | Something failed on the provider side. Retry once; if it keeps failing, contact us. |
| 503 | Service Unavailable | An upstream source is briefly unavailable. Retry after a short pause. |

## Rate Limits

Monthly quotas are 10 calls on Free, 120 on Starter, 360 on Pro and 960 on Business. The Free plan is a 7-day trial. Free and Starter allow 1 request per second, Pro allows 2 and Business allows 1, and each request counts as one call. Going over the per-second limit returns `429 Too Many Requests` with `retryAfterMs` in the body. Throttle your client, send requests one after another rather than in parallel on the lower plans, and honour the `Retry-After` header before retrying.

## FAQ

*   **What can I pass as `asin`?**

    A 10-character ASIN such as `B00FLYWNYQ`, or an Amazon product link.

*   **How is `organicRank` different from `rankAbsolute`?**

    `organicRank` counts organic results only; `rankAbsolute` counts every result on the page, sponsored ones included.

*   **Which marketplaces are supported?**

    Keyword volume covers 16 marketplaces: US, UK, CA, DE, FR, IT, ES, NL, AT, IN, AU, MX, AE, SA, EG and SG. Reverse ASIN and related keywords cover US, AE, SA and EG.

*   **Is this an official Amazon API?**

    No. It is an independent keyword research API and is not run or endorsed by Amazon.

## Contact Us

If you have any questions or need assistance, you can reach out to us through the embedded chat on the bottom right corner of the page or send an email to hello@magicapi.com.


Reverse ASIN keywords, related Amazon search terms and monthly search volume for up to 50 keywords per call across 16 Amazon marketplaces.

Amazon Keyword Research API: Reverse ASIN, Volume

Free