Rarity Sniffer was an Ethereum NFT rarity tool. It ranked items in a collection by how scarce their traits were, added new collections within about five seconds of a reveal, and offered an API, according to its Moralis Web3 Wiki entry, last edited November 22, 2023. Today raritysniffer.com is a one-screen pitch. It promises rarity estimates before they are public and an average "sniff time" under 20 seconds, then asks visitors to request access. It offers no public rankings.
The tools people paired with it have thinned out too. Trait Sniper has pivoted to an airdrop, and Blur announced that its website would shut on November 12, 2026, leaving its onchain marketplace running. The good news is that OpenSea and Magic Eden now show rarity on their own collection pages, so most collectors no longer need a separate site for a quick rank check.
The six picks below cover Ethereum and Solana, from free ranks on marketplace pages to an open source library you run yourself. A high rarity rank does not mean an NFT will hold its price, and most collections lose value over time. Nothing here is investment advice.
Prices below are as of November 8, 2026. Our method is on How we review tools.
Quick comparison
| Tool | Best for | Price | Platforms |
|---|---|---|---|
| OpenSea rarity ranks | Rank checks on Ethereum and other EVM collections | Free | Web, API |
| Rarity Sniper | Ranks plus a mint calendar across chains | Free | Web |
| Magic Eden | Solana ranks inside the marketplace | Free to browse; 2% marketplace fee, per Rarible | Web |
| HowRare.is | Solana rarity lookup and wallet checks | Free | Web, API |
| OpenRarity | Computing ranks yourself in Python | Free, open source (Apache-2.0) | Python 3.10 to 3.12 |
| Etherscan Latest Mints | Spotting new Ethereum mints early | Free | Web |
OpenSea rarity ranks
For most Ethereum collections, the rank you want is already on OpenSea. It uses OpenRarity, a standard built by OpenSea with icy.tools, Curio and PROOF, and shows a rank on each item in eligible collections. Hovering shows the percentage rank, the collection page can filter by rarity, and the Traits tab shows how rare each trait is. When enabled, the ranks are in the OpenSea API too.
Eligibility has rules. The OpenSea help article on OpenRarity, dated July 8, 2025, says ranks appear automatically only for ERC721 collections with text-based traits and trait data, and creators can switch them off in Studio. OpenSea advises turning ranks on only after a full reveal, because metadata changes move the ranks.
Best for: Collectors who want a rank next to the price on the page where they buy.
Pricing:
- Rarity ranks and filters: free
- Selling: 1.0% platform fee on all chains since September 15, 2025
Watch out for:
- ERC1155 collections and collections with numeric traits get no rank, and some creators turn ranks off.
- Ranks follow creator-published metadata, so a metadata edit after the reveal can reshuffle them.
Official site: OpenSea rarity ranks.
Rarity Sniper
The name is one letter off, and the job is close too. Rarity Sniper says it ranks more than 1,000 collections on Ethereum, Solana and Polygon. A buy now feature shows the OpenSea price next to a ranked item.
It also runs a free drops calendar that holds a few dozen announced collections, so you can watch a project before it mints and check ranks after it reveals. That pairing is the closest match to how people used Rarity Sniffer around reveal day.
Best for: Collectors who follow new mints and want ranks soon after reveal.
Pricing:
- Rankings and calendar: free
- Listing or advertising fees for creators: not published
Watch out for:
- Its own disclaimer says it may earn listing or advertising fees from NFT creators or holders, so a featured collection may be a paid placement.
- Coverage depends on which collections it chooses to add, and smaller or older ones may be missing.
Official site: Rarity Sniper.
Magic Eden
On Solana, Magic Eden shows rarity right on collection pages, profile pages, item details and its AMM pools. Its own score is statistical rarity: it multiplies the share of the collection that has each of an NFT's traits, after marking missing traits as their own value, and a lower score ranks higher. NFTs with the same score share a rank.
Its rarity filter can also switch to MoonRank or HowRare scores once those are found for a collection, per the Magic Eden help article. Comparing two methods side by side shows if a piece is rare by every measure or only by one.
Best for: Solana collectors who want ranks where they trade.
Pricing:
- Rarity ranks: free
- Marketplace fee: 2%, per Rarible's fee FAQ for Magic Eden listings
Watch out for:
- Statistical rarity is added only for new mints. Older collections need a creator request to Magic Eden support.
- Magic Eden dropped Ethereum and Bitcoin Ordinals trading in March 2026, so it no longer helps with EVM collections.
Official site: Magic Eden.
HowRare.is
HowRare.is is a Solana-only rarity site that covers nearly 1,900 Solana collections and more than 7 million items. Its Top 250 table lists floor price, holders and items for sale, and a wallet viewer covers what you already hold.
It also has an upcoming drops page, a submission form for new collections, a public API and a GitHub link. Because Magic Eden can display HowRare scores in its own filter, a buyer on Magic Eden can see the same score you checked on HowRare.is.
Best for: Ranking every NFT in a Solana wallet at once.
Pricing:
- Rankings, wallet viewer and API: free; no paid plan listed
Watch out for:
- Solana only. Ethereum and Polygon collections are out of scope.
- Collections reach the site through a submission form, so very new or small mints may not be ranked yet.
Official site: HowRare.is.
OpenRarity
Rarity Sniffer's API users need something to call or run. OpenRarity is the open source Python library behind OpenSea's ranks, published on PyPI as open-rarity under the Apache-2.0 licence. It takes a collection's trait data and returns reproducible ranks, so two people running it on the same metadata get the same answer.
The PyPI release history shows version 0.7.5 from September 26, 2023 as the latest, and it needs Python 3.10 to 3.12. Fetching metadata at reveal time is up to you, which is the speed part Rarity Sniffer sold.
Best for: Developers who want their own rank feed instead of a website.
Pricing:
- Free and open source (Apache-2.0)
Watch out for:
- No release since September 2023, and it does not install on Python 3.13 or newer.
- It only ranks. You still need a metadata source and your own code to watch for reveals.
Official site: OpenRarity.
Etherscan Latest Mints
Speed at reveal was Rarity Sniffer's pitch, and that starts with knowing a collection is minting. Etherscan's free Latest Mints page lists new Ethereum mints as they land, next to Top Mints, Latest Trades and a Top NFTs ranking in the same NFT menu.
It does not rank rarity. Its use here is the step before: spot the mint on Etherscan's NFT pages, confirm the contract, then check ranks on OpenSea or run OpenRarity once the metadata is final.
Best for: Watching for new Ethereum collections before rank sites add them.
Pricing:
- NFT pages: free, no account needed
Watch out for:
- No trait or rarity data at all; it only shows on-chain mint and trade activity.
- Ethereum only.
Official site: Etherscan Latest Mints.
How to choose
| If you need | Pick |
|---|---|
| A rank on an Ethereum NFT you are about to buy | OpenSea rarity ranks |
| Ranks plus a calendar of upcoming mints | Rarity Sniper |
| Solana ranks where you trade, with two methods to compare | Magic Eden |
| Ranking every NFT in a Solana wallet | HowRare.is |
| Your own rank feed through code | OpenRarity |
| Early warning that a new Ethereum collection is minting | Etherscan Latest Mints |
When to stay with Rarity Sniffer
There is nothing public left to use on Rarity Sniffer, only a request-access form. Do not connect a wallet or pay for early access through a site that shows no product, and be wary of any site that asks for a wallet connection before it will show "pre-reveal" rarity. If you trade on OpenSea already, its built-in ranks cover the same need, and our OpenSea alternatives guide lists the marketplaces still running.
Frequently asked questions
Is Rarity Sniffer still working?
Not as a public tool. The site shows a short pitch for rarity estimates before reveal and a Request Access button, but no rankings or collections. Its Moralis directory entry, last edited in November 2023, described an Ethereum-only ranking site with an API.
How is NFT rarity calculated?
Most tools compare how often each trait appears in a collection. Magic Eden's statistical rarity multiplies those trait shares, so rarer combinations score lower and rank higher. OpenRarity, used by OpenSea, is an open standard with published code, so anyone can reproduce a rank. Different methods can rank the same NFT differently, which is why checking two sources helps.
What happened to Trait Sniper?
Its homepage now promotes an airdrop, a swap feature and a meme token. It still advertises a free ranking API, but it no longer presents itself mainly as a rarity tool.
Why does an NFT show no rarity rank on OpenSea?
Either the creator has not turned ranks on, or the collection is not eligible. OpenSea ranks only ERC721 collections with text-based traits and trait data. ERC1155 items and numeric traits are left out.
Can I see rarity before an NFT is revealed?
Not reliably. Before reveal, the final metadata is not public, and OpenSea itself recommends showing ranks only after a full reveal. Sites that promise pre-reveal ranks for a fee or a wallet connection deserve suspicion. For upcoming mints, see our Upcoming NFT alternatives page.
