Claim the UNI airdrop from 2020

On 2026-11-01 the contract source and current app route table were checked. No dedicated UNI claim page was confirmed. The bundle contains old claim labels, but /uni and /claim are not registered routes. A final browser check is needed before relying on any app claim option.

What happened to the original UNI airdrop?

Uniswap’s announcement describes the September 2020 distribution: 150 million UNI for historical users, including 400 UNI for addresses that called Uniswap before September 1, 2020, a liquidity-provider allocation and a SOCKS allocation. Buying UNI now does not create an entitlement to that historical distribution.

The catalog recorded 257,005 UNI remaining in the distributor on 2026-11-01, down from about 12.5 million on 2026-10-04. Its recorded claim activity showed batch claims submitted on behalf of eligible owners from around October 18, 2026. If you never claimed yourself, the allocation may already have arrived in the eligible wallet.

Who is eligible?

Eligibility comes from Uniswap’s published Merkle tree. The distributor is 0x090D4613473dEE047c3f2706764f49E0821D256e on Ethereum. Its verified source checks an allocation’s index, recipient, amount and proof, then checks whether that index was paid.

An allocation is not an available balance if it was already claimed. The zero address allocation cannot receive UNI and is reported as lost. Having traded through a different wallet also does not make your current wallet eligible.

How to get it out if the app has no claim page

Do not connect to a new “UNI recovery” site because an old tutorial’s button is missing. A GET of app.uniswap.org/uni or /claim returns an app shell, not evidence of a claim page.

1. Check eligibility and claim status first. If it was paid, inspect the eligible wallet’s UNI balance and history instead of trying to claim twice.
2. Obtain your entry from Uniswap’s published distribution files. The pinned mapping.json maps chunk boundaries; the matching chunk contains the entry for the complete eligible address. You need its index, amount in raw UNI units and full proof array. The amount in these files is hexadecimal, not a human-readable UNI quantity.
3. Verify that entry’s proof against the distributor’s Merkle root and check isClaimed(index). DeFi Checkup does this verification for its finding, but does not currently display a prepared claim or a downloadable proof. Do not reconstruct the raw amount from a rounded display value.
4. If no official claim screen is available, the operation is claim(uint256 index, address account, uint256 amount, bytes32[] merkleProof) on the distributor above. A person comfortable with verified-contract tools can prepare that exact call using the published entry. If you cannot verify those inputs, stop and get technical help rather than send a guessed transaction.
5. The caller pays Ethereum gas. Anyone can submit a valid claim, and UNI goes to account, which is bound into the proof. Before copying the recipient, use your own wallet as the source, never transaction history, and compare the entire address to avoid address poisoning.

DeFi Checkup provides no claim button and never sends this transaction. The missing confirmed frontend is a practical limitation, not a claim that the distributor has expired.

What it costs

A recorded claim used 83,345 gas on 2026-11-01; the scanner budgets 84,000 gas. This is one Ethereum transaction, with ETH cost determined by the current gas price. A second claim for an already paid index fails and can still waste gas.

Deadline and risks

The verified distributor has no expiry or sweep function. Payment still needs enough UNI in the contract. Do not confuse this historical airdrop with new giveaways or a promise of another drop.

How to check your original allocation

Run the read-only scanner with the original address. It loads Uniswap’s pinned files, validates the proof and reads claim status and backing. No wallet connection. No signatures. An already claimed result does not tell you who currently controls the recipient wallet.

FAQ

Can I claim the 400 UNI airdrop now?

Only if your original allocation is valid, unclaimed and backed by enough UNI. The historical 400 UNI amount was not a universal entitlement for every Ethereum wallet.

Where is the Claim UNI button?

No working claim screen was confirmed in the current app on 2026-11-01. Old labels remain in its JavaScript, but the checked route table does not register /uni or /claim.

Can someone else claim my UNI?

Someone else can submit a valid proof and pay gas. The distributor sends UNI to the address in the proof, so the submitter cannot replace the recipient with their own wallet.

How much gas does the old UNI claim use?

The catalog measured 83,345 gas for one real claim on 2026-11-01 and uses an 84,000 gas estimate. Check the current Ethereum fee before submitting.

What if I never claimed but the scanner says already claimed?

Check the eligible wallet’s UNI transfers. The contract accepts claims on behalf of another address, and the catalog recorded batch activity doing this in October 2026.

Verified on

2026-11-01. Official UNI announcement, Sourcify distributor source, published distribution files, catalog fixtures and gas record; app HTML, JavaScript route table and both legacy paths. Browser confirmation of any reachable claim modal remains pending.