Amazon Creators API MCP - paste-ready affiliate product cards, straight from a chat

If you write product round-ups, you already know the boring part. You find the product on Amazon, copy the image, grab the price, paste your affiliate link, and hope the price hasn't moved by the time someone reads the post. Then you do it again for the next nine products.

This does that part for you. You ask Claude to find something, it searches the live Amazon catalogue, and it hands you back a finished HTML card - image, price, savings, star rating, your Associates tag already baked into the link, and the disclosure footer Amazon requires. Paste it into WordPress, Ghost, Substack, whatever you write in. In Claude Desktop you even see the card render before you copy it.

Built on the Amazon Creators API - the REST API that replaced Product Advertising API 5.0 when Amazon retired the old endpoint on 15 May 2026. If your workflow still points at PA-API, it's been dead for a while now. This is the way back in.

One "make a grid of these" and you get this - styles inlined, tag in every link, disclosure at the bottom. Paste it and move on.

Quick nav

Who it's for · How you'll actually use it · Getting your API key · Install · Environment variables · Tools · Output formats · Styling · Associates compliance · Troubleshooting

Who it's for

• Affiliate bloggers and niche-site owners who live in round-ups and "best X for Y" posts, and want the product embeds done in seconds instead of by hand.
• Content and SEO teams who need consistent, on-brand product cards across a lot of articles, without a developer wiring up the API each time.
• Newsletter writers on Substack, Ghost or beehiiv who just want clean HTML they can drop into an issue.
• Anyone migrating off PA-API 5.0 who needs a working replacement now that the old endpoint is gone.

You don't need to know what an API is to use it - if you can add an MCP server to Claude and paste your Associates keys once, you're set. The key bit is having an eligible Associates account.

How you'll use it

The whole thing is built around a conversation, not a form. You describe what you're writing about, Claude searches and summarises, and it only spits out HTML when you actually ask for the embed. Here's the shape of it.

1. Find products for a post

"Find me the best direct-drive racing wheels under £500"

Claude runs search_items and comes back with a plain summary - no HTML yet:

Found 8 direct-drive wheels under £500. The ones worth a look: • Fanatec CSL DD (£349) - well reviewed, 5 Nm motor • Moza R5 Bundle (£469) - comes with pedals, 5.5 Nm • Cammus C5 (£399) - compact Want me to build an embeddable grid for these?

2. Build the card or grid

"Yes, make a grid of the top three"

Now it switches to format: 'html-grid' and returns a complete HTML document. Images, prices, savings, stars, your tag, the "as of" timestamp, the disclosure footer. All of it. Paste and you're done.

3. Restyle it without burning your rate limit

This is the bit that saves you. The Creators API has real rate limits (roughly a request a second to start with, climbing as you drive more sales), so you don't want to re-query Amazon every time you fancy a different colour. You don't have to. Claude keeps the data from the last call and re-renders locally:

"Same grid, but dark cards and hotpink buttons"

{
  "response": { "searchResult": { "items": [ /* from the previous call */ ] } },
  "format": "html-grid",
  "customStyles": ".amzn-card{background:#0f172a;color:#f1f5f9} .amzn-card__cta{background:hotpink;color:#111}"
}

Twenty style tweaks, zero extra API calls. Iterate on the look as much as you like.

4. Look up specific ASINs

"Get me the current details for B09B2SBHQK, B08N5M7S6K and B0BZC6YR7Q"

Claude calls get_items and summarises the three. One thing worth knowing: the API doesn't promise to return items in the order you asked for them, and it quietly drops any ASIN it can't find (those land in a separate errors array). Claude matches on the asin field so you don't have to think about it.

5. List colour and size variations

"What colours does the Echo Show 5 come in?"

That's get_variations - it lists the child products of a parent ASIN, each with its own price.

Getting your API key

This is where most people get stuck, so I'll be straight with you: the Creators API isn't open to everyone, and there's a sales gate. Worth knowing before you spend an afternoon on it.

What you need first

• An approved Amazon Associates account for the marketplace you're targeting (a .com account won't work against .co.uk - the credentials are tied to a region).
• At least 10 qualifying shipped sales in the trailing 30 days. This is the one that catches people. If your account dips under 10 sales across any rolling 30-day window, access gets suspended until you're back over the line. New or quiet accounts simply won't have API access yet.
• You have to be the primary account owner. Secondary users on an Associates account can't see the Creators API page or generate keys. In my experience this trips up teams more than anything else.
• Node.js 20 or newer on the machine running the MCP.

Where to create the credentials

Sign in to Associates Central, open the Tools menu, and pick Creators API - or just go straight to affiliate-program.amazon.com/creatorsapi. Then it's three steps.

1. Create a Creators API application

2. Name it and pick your region

The region you choose here decides your AMAZON_CREDENTIAL_VERSION (NA = 3.1, EU = 3.2, FE = 3.3 - full table below). Pick the region that matches the marketplace you actually write for.

3. Copy the Credential ID and Secret

Amazon generates a Login with Amazon (v3.x) credential pair. Copy both - the ID goes in AMAZON_CLIENT_ID, the secret in AMAZON_CLIENT_SECRET. These never leave your own machine. The MCP server talks to Amazon directly; nothing is sent to Houtini or anyone else.

On older v2.x credentials: if you set an app up before early 2026 you might have v2.x Cognito credentials lying around. They don't work here. Create a fresh Login with Amazon application to get v3.x keys - the server checks on startup and refuses v2.x with a message telling you exactly this, so you won't be left guessing.

Install

You don't clone anything to use it - npx pulls the published package. You just need your five environment variables to hand.

Claude Desktop

Open your config file:

• Windows: %APPDATA%\Claude\claude_desktop_config.json
• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "amazon-creators": {
      "command": "npx",
      "args": ["-y", "@houtini/amazon-creators-mcp"],
      "env": {
        "AMAZON_CLIENT_ID": "amzn1.application-oa2-client.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
        "AMAZON_CLIENT_SECRET": "amzn1.oa2-cs.v1.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
        "AMAZON_PARTNER_TAG": "yourtag-20",
        "AMAZON_CREDENTIAL_VERSION": "3.1",
        "AMAZON_MARKETPLACE": "www.amazon.com"
      }
    }
  }
}

Restart Claude Desktop, then say "find me [whatever you're writing about] on Amazon" and you're off.

Claude Code (CLI)

claude mcp add \
  -e AMAZON_CLIENT_ID=amzn1.application-oa2-client.xxx \
  -e AMAZON_CLIENT_SECRET=amzn1.oa2-cs.v1.xxx \
  -e AMAZON_PARTNER_TAG=yourtag-20 \
  -e AMAZON_CREDENTIAL_VERSION=3.1 \
  -e AMAZON_MARKETPLACE=www.amazon.com \
  -s user amazon-creators -- npx -y @houtini/amazon-creators-mcp

Check it took with claude mcp get amazon-creators - you want to see Status: Connected.

Environment variables

Credential version by region

Your credentials are tied to one region, and calling a marketplace outside it fails auth - so the server cross-checks these at startup and stops you early rather than letting you find out mid-request.

Tools

The four Amazon-facing tools all take:

• format - 'json' | 'markdown' | 'html-card' | 'html-grid' (default markdown; get_browse_nodes is json | markdown only)
• resources - which fields to pull, as camelCase paths (itemInfo.title, offersV2.listings.price). Leave it off for a sensible default set.
• customStyles - extra CSS tacked onto the built-in stylesheet when you're rendering HTML.
• titleMaxChars - cap the rendered title (default 80). Amazon titles are often 150-plus characters of keyword soup, and 80 keeps a card to one line. Set 0 to turn it off. Markdown and JSON always get the full title.
• hideItemsWithoutPrice - for html-grid, drop anything with no price (default true). A card with no price is a weak embed - no hook, nothing to click for. Set false if you're building a comparison table where you want the product shown regardless.

Deal rows that match your site, not the tool

The formats below all produce a card that looks like a card. That's right for a one-off embed and wrong the moment you drop it into a post that already has house styling - you end up with somebody else's design sitting in the middle of your article.

html-deals emits structural markup instead: .amazon-deals-section wrapping one .amazon-deal-row per product. If your theme already defines those classes, the output inherits them and there's nothing to restyle. If it doesn't, pass includeCss: true and you get a sensible default:

Find me three burr coffee grinders and give me deal rows for the post

Each row is a fixed 70px so ten products read as a scannable list rather than ten screens of scrolling. Feature bullets are off by default for the same reason - set featureCount if you want them, and unset the row's max-height in your own CSS to make room.

Two things it will not print:

• A Prime badge. Nothing in the Creators API response says whether an item is Prime-eligible, so claiming it would be inventing a delivery promise on a page someone might buy from.
• Empty stars. Review data is restricted per Associates account; where Amazon returns none, the rating line is dropped rather than rendered as zero.

A note on star ratings

customerReviews.starRating and customerReviews.count are requested on every call, but Amazon only returns them for accounts eligible for that data. If your rows have no stars, that's the account, not the tool - the fields are being asked for correctly and the formatter degrades rather than inventing a number.

Output formats

• markdown - image, linked title, price, disclosure. Drops straight into a blog editor. Full untruncated titles.
• html-deals - structural deal rows that inherit your site's CSS. See above. The one to use for articles.
• html-card - one self-contained <article class="amzn-card"> with its styles inlined. Title capped at titleMaxChars. If there's no price, it renders a muted "Check price on Amazon" link so the card still has somewhere to click.
• html-grid - a responsive grid of those cards for a search or a list. No-price items dropped by default.
• json - the parsed response, pretty-printed. For when you want to see what Amazon actually sent.

If you'd rather not touch HTML at all, markdown is the friendliest. Ask for it and you get exactly this, ready to drop into a post:

[![Fanatec CSL DD Direct Drive Wheel Base (5 Nm)](https://m.media-amazon.com/images/…jpg)](https://www.amazon.com/dp/B0EXAMPLE01?tag=yourtag-20)
**[Fanatec CSL DD Direct Drive Wheel Base (5 Nm)](https://www.amazon.com/dp/B0EXAMPLE01?tag=yourtag-20)**
Brand: Fanatec · 4.7★ (1,284 reviews)
**£349.95** — save £40.00 (10% off) _(as of 20 Jul 2026, 15:24 UTC)_
ASIN: `B0EXAMPLE01`

> *As an Amazon Associate we earn from qualifying purchases. Prices and availability are accurate as of the time shown and are subject to change.*

In Claude Desktop the card renders inline before you copy it, using the official MCP Apps protocol - a sandboxed preview so you're not pasting blind. On a host that doesn't do MCP Apps yet, you still get the HTML as plain text, which is the exact thing you paste anyway. Nothing lost.

Styling the cards

Every visible bit of a card has a stable class hook, so you can restyle the whole thing through conversation without anyone touching the code:

.amzn-card                    .amzn-card__image              .amzn-card__title
.amzn-card__meta              .amzn-card__brand              .amzn-card__rating
.amzn-card__price             .amzn-card__price--unavailable .amzn-card__savings
.amzn-card__cta               .amzn-card__disclosure         .amzn-grid

So this works:

"Make the CTA hotpink and the card a dark rounded rectangle."

{
  "keywords": "coffee grinder",
  "format": "html-card",
  "customStyles": ".amzn-card{background:#0f172a;color:#f1f5f9;border-radius:20px} .amzn-card__cta{background:hotpink;color:#111}"
}

customStyles is appended after the default stylesheet, so your rules win on ordering. Match your site's look once, then reuse the same CSS on every render.

Associates compliance

Displaying Amazon product data comes with rules, and it's your account on the line if you get them wrong. So the server bakes the boring-but-important bits in for you:

• Your AMAZON_PARTNER_TAG goes on every outbound link. It prefers the already-tagged detailPageURL Amazon returns, and falls back to a /dp/ASIN?tag=… link if it has to.
• Every link carries rel="nofollow sponsored noopener".
• Whenever a price shows, so does the time it was retrieved (as of <timestamp>).
• Every card and grid ends with the Associates disclosure footer.

None of that is optional under the Associates Operating Agreement, which is exactly why it's automatic rather than something you have to remember.

Development

git clone https://github.com/houtini-ai/amazon-creators-api-mcp
cd amazon-creators-api-mcp
npm install
npm run build

If you've got live credentials, npx tsx scripts/smoke-auth.ts runs a real token fetch plus one searchItems call - the quickest way to confirm your keys actually work end to end.

See SCOPE.md for the architecture and the API quirks worth knowing.

Troubleshooting

"Credential version rejected" on startup - you're on v2.x Cognito credentials. Create a fresh Login with Amazon app in Associates Central → Creators API, then set AMAZON_CREDENTIAL_VERSION to 3.1, 3.2 or 3.3 for your region.

401 or 403 errors - usually one of two things. Either your Associates account doesn't have the 10 qualifying sales in the last 30 days, or Creators API access isn't switched on for the account yet. Both are checked in Associates Central.

A region mismatch error at startup - your credential version and your marketplace are in different regions (a 3.1 NA key pointed at www.amazon.co.uk, say). Use credentials issued for the same region as the marketplace you're calling.

Preview images not showing in Claude Desktop - the viewer only allowlists Amazon's own image CDNs. On a host with a stricter policy the preview images might not load, but the plain HTML output is fine - it renders once it's pasted into your site.

"The items came back in the wrong order" - that's expected. get_items can return items in any order and drops any ASIN it can't find into a separate errors array. Match on the asin field. Claude does this for you when it summarises.

Licence

MIT. See LICENSE.

Built by Houtini for the Model Context Protocol community. Part of the houtini-ai MCP suite.