Momox Books APImomoxbooks.com ↗
Search Momox Books by ISBN to retrieve second-hand book prices, condition grades, stock status, and reference pricing via a single API endpoint.
What is the Momox Books API?
The Momox Books API gives developers structured access to used book listings on momoxbooks.com through 1 endpoint, get_offers_by_isbn. Submit any ISBN-10 or ISBN-13 and get back an array of offer objects covering condition variants, current prices, reference prices, stock availability, title, and creator data — enough to build price comparison tools or inventory monitors against Momox's second-hand catalogue.
curl -X GET 'https://api.parse.bot/scraper/bdf713d4-8b04-4862-a98a-68d4f2913931/get_offers_by_isbn?isbn=9780141439518' \ -H 'X-API-Key: $PARSE_API_KEY'
Typed, relational, agent-ready
A generated client with real types, enums, and the links between objects — the structure a flat JSON response can't carry. Autocompletes in your editor and reads cleanly to coding agents.
- Fully typed · autocompletes
- Objects link to objects
- Typed errors & pagination
Typed Python client. Set up the SDK in your uv project, then pull this API’s typed client:
uv add parse-sdk uv run parse init uv run parse add --marketplace momoxbooks-com-api
uv run parse add --marketplace pulls a pinned snapshot of this canonical API — it won’t change underneath you. To customize it, subscribe and swap to your own copy.
from parse_apis.momox_books_offer_api import MomoxBooks
momox = MomoxBooks()
# Search for offers on Pride and Prejudice by ISBN
for offer in momox.offers.search(isbn="9780141439518"):
print(offer.title, offer.price_eur, offer.condition, offer.in_stock)
for creator in offer.creators:
print(creator.name, creator.role)
for variation in offer.variations:
print(variation.condition, variation.price_eur, variation.in_stock)
Search momoxbooks.com for available offers on a book by its ISBN. Returns all available condition variants (e.g. Used - like new, Used - very good, Used - good) with their prices, stock status, and reference prices. If no offers exist for the given ISBN, returns an empty offers array.
| Param | Type | Description |
|---|---|---|
| isbnrequired | string | ISBN-13 or ISBN-10 of the book to search for (e.g. 9780141439518). |
{
"type": "object",
"fields": {
"offers": "array of offer objects with title, price, condition, variations, creators, and availability",
"isbn_query": "string - the ISBN that was searched",
"total_results": "integer - number of matching products found"
},
"sample": {
"data": {
"offers": [
{
"url": "https://www.momoxbooks.com/products/austen-jane-pride-and-prejudice-9780141439518",
"isbn": "9780141439518",
"title": "Pride and Prejudice",
"creators": [
{
"name": "Vivien Jones",
"role": "editor"
},
{
"name": "Jane Austen",
"role": "author"
}
],
"in_stock": true,
"condition": "Used - very good",
"image_url": "https://cdn.shopify.com/s/files/1/0925/5829/5382/files/product_image_9780141439518_1_a263b417-95de-407c-ac1a-a89e5751a434.jpg?v=1777943731",
"price_eur": 7.49,
"variations": [
{
"in_stock": true,
"condition": "Used - very good",
"price_eur": 7.49,
"variant_id": "gid://shopify/ProductVariant/53364934410582",
"reference_price_eur": 10
}
],
"description": "Austen's most popular novel...",
"product_type": "Book",
"reference_price_eur": 10
}
],
"isbn_query": "9780141439518",
"total_results": 1
},
"status": "success"
}
}About the Momox Books API
What the API Returns
The single get_offers_by_isbn endpoint accepts an isbn parameter (ISBN-10 or ISBN-13, e.g. 9780141439518) and returns all available offers Momox Books lists for that title. Each item in the offers array includes the book's title, price, condition label (such as "Used - like new", "Used - very good", or "Used - good"), variations for any sub-condition or edition distinctions, creators (authors and contributors), and an availability flag indicating whether the item is currently in stock. Two summary fields accompany every response: isbn_query echoes the searched identifier, and total_results reports the integer count of matching products found.
Condition and Pricing Data
Momox Books grades its used inventory into explicit condition tiers, and the API surfaces each tier as a separate offer object rather than collapsing them. This means a single ISBN query may return multiple rows — one per condition grade — each with its own price and availability status. Reference prices are also included in the offer objects, enabling straightforward calculation of discount depth against a baseline retail or list value.
Availability and Empty Results
When no offers exist for a given ISBN — because the title is out of stock or not carried — the endpoint returns an empty offers array rather than an error. total_results will be 0. This makes it safe to poll the endpoint for stock alerts without needing special error handling for unlisted titles.
The Momox Books API is a managed, monitored endpoint for momoxbooks.com — not a raw scraper you maintain. Every endpoint is automatically health-checked on a schedule, and when momoxbooks.com changes and a check fails, the API is automatically queued for repair and re-verified. It is built to keep working as the site underneath it changes.
This isn't an official momoxbooks.com API — it's an independent, maintained REST wrapper over public data. Where the source has no official API (or only a limited one), Parse gives you a stable contract over a source that never promised one, and keeps it current. Need a new endpoint or field? You can revise it yourself in plain English and the agent rebuilds it against the live site in minutes — contributing the change back to the shared API is free.
Will this API break when the source site changes?+
Is this an official API from the source site?+
Can I fix or extend this API myself if I need a new endpoint or field?+
What happens if I call an endpoint that has an issue?+
- Build a used-book price tracker that monitors condition-specific price changes for a watchlist of ISBNs
- Compare Momox Books prices against other resellers using the returned
priceand reference price fields - Check real-time stock availability for specific ISBNs before surfacing buy links to end users
- Aggregate
conditiongrades and prices to display a graded pricing ladder on a book detail page - Flag when a previously unavailable ISBN becomes in-stock by polling
availabilityandtotal_results - Populate a resale valuation tool with current Momox offer prices keyed by ISBN
| Tier | Price | Credits/month | Rate limit |
|---|---|---|---|
| Free | $0/mo | 100 | 5 req/min |
| Hobby | $30/mo | 1,000 | 20 req/min |
| Developer | $100/mo | 5,000 | 100 req/min |
One credit = one API call regardless of which marketplace API you call. Exceeding the rate limit returns a 429 response. Authenticate with the X-API-Key header.
Does Momox Books offer an official developer API?+
What does `get_offers_by_isbn` return when a book has multiple condition grades?+
offers array. Each object carries its own price, condition label, availability status, and variations field, so you can compare grades for the same ISBN in a single response.Does the API cover seller ratings, individual seller profiles, or buyer reviews?+
Can I search by title or author rather than ISBN?+
isbn parameter. Title or author-based search is not covered. You can fork the API on Parse and revise it to add a text-search endpoint if that lookup is required.How fresh is the pricing and availability data?+
get_offers_by_isbn retrieves current data from Momox Books at request time. There is no cached snapshot — results reflect whatever Momox is listing at the moment the request is made, so stock changes and price updates are picked up on the next call.