Docs
Everything PairMention does, in plain language — including exactly what we can and cannot do with your X account, your wallet and your money.
What is PairMention
PairMention is a memecoin launchpad on Robinhood Chain where the trading pair is an X handle. Anyone can launch a coin under any handle; it trades as TICKER / @HANDLE on PairMention's own on-chain market, and a fixed slice of every trade is set aside for the owner of that X account — whether or not they have ever heard of us.
PairMention is independent. It is not affiliated with, endorsed by, or operated by Robinhood or X.
How it works
- Launch. Pick an X handle, a name, a ticker and an image, pay the launch fee, optionally bundle an opening buy. Your coin and its market exist in the same transaction.
- Trade. Buy and sell with ETH right on the coin's page. Prices follow a bonding curve (the pump.fun model) until 793,000,000 tokens are sold; then the coin graduates: the ETH raised plus the reserved 207,000,000 tokens become a permanent pool locked inside the same contract, at the same price.
- Earn. Every trade pays 1.5%, split launcher / X owner / PairMention. Anyone can press Harvest; money only ever reaches those three fixed recipients.
- Claim. The X account owner signs in with X once, proves they control the handle, and receives everything set aside for it — across every coin under their name, past and future.
The pair: TICKER / @HANDLE
Every handle gets its own quote asset, an ERC-20 called @HANDLE (for example @ELONMUSK). It is wrapped ETH: one @HANDLE is always exactly one ETH, anyone can wrap or unwrap at any time, and nobody controls it — there is no owner, no minting, no fee.
Coins under a handle are priced in that handle's token, so the on-chain pair really is ELON / @ELONMUSK. You never have to touch the quote token yourself: the market wraps and unwraps behind the scenes, so you pay ETH and receive ETH.
Fees, exactly
| Source | Rate | Who receives it |
|---|---|---|
| Launch fee (once) | 0.0005 ETH | PairMention |
| Trade fee, every buy and sell | 1.5% | split below |
| → launcher | 0.25% | the wallet that launched the coin |
| → X account owner | 0.75% | held in HandleVault until claimed, then paid directly |
| → PairMention | 0.50% | treasury |
| Opening anti-snipe tax | 98% → 0% over 3 s | added to the same split; the launcher's bundled opening buy is exempt |
The split is written into each coin at launch and can never be changed for that coin. PairMention's share is hard-capped at 50% of the fee in code and the fee itself at 5%; changes only affect future coins.
For X account owners — is claiming safe?
Yes. Here is precisely what happens, and what cannot happen.
Signing in with X
- It is X's own standard login (OAuth 2.0). You type your password on x.com, never on our site.
- We request read-only access and receive only four things: your user id, your @username, your display name and your avatar URL.
- We cannot post, reply, like, follow, read your DMs, or change anything on your account. The permission screen on X shows exactly this.
- We keep nothing in a database. Your identity lives in a signed cookie in your own browser for up to 7 days; no X access token is stored after sign-in. Sign out any time.
- You can revoke our app at any time from x.com → Settings → Security → Connected apps.
Connecting a wallet
- Connecting a wallet only tells the page your address. It gives PairMention no control over your funds.
- The only transaction you sign is claim(handle, deadline, signature) on the HandleVault contract. There are no token approvals, no “unlimited spend”, nothing that touches your existing balances.
- The claim links your @handle to the wallet you are using. Choose a wallet you control long-term (a hardware wallet is fine). You can change the payout wallet later with setWallet.
- Nobody — not the launcher, not PairMention, not the contract owner — has any function that can redirect your share elsewhere. It goes to the vault, and from the vault only to the wallet that proved ownership of your handle.
- If your wallet ever cannot receive ETH (some smart wallets), your share simply keeps accruing in the vault and you can withdraw it later; nothing is lost.
You are never obligated to claim, and a coin under your handle does not mean you endorse it. Your share waits for you on-chain indefinitely.
For launchers
- No sign-in. You pay the 0.0005 ETH launch fee plus gas; an opening buy can be bundled into the same transaction and is exempt from the anti-snipe tax.
- You receive 0.25% of every trade, forever, to the wallet that launched the coin. You can change that payout wallet with setLauncher.
- Selling is a single transaction (EIP-2612 permit) — no separate approval.
- Anyone can press Harvest on your coin — it just moves fees to their fixed recipients. If your wallet cannot receive ETH, your share is parked and you can pull it with withdrawOwed.
- Once 793M tokens are sold the coin graduates into a pool locked inside its own contract. Nobody, including PairMention, can withdraw that liquidity.
Security & trust model
Rules that are enforced by the contracts themselves, not by us:
- A coin's fee split can never change after launch.
- The X owner's share can only reach the wallet that proved ownership of that handle.
- One claim per handle, ever; the claimed wallet can re-point payouts, nobody else can.
- There is no withdraw(to) for reserves or fees anywhere. Harvesting is permissionless because every recipient is fixed.
- Graduated liquidity is owned by the market contract itself and has no exit function.
- No party can block another's payout: sends are gas-capped and never revert a harvest; undeliverable amounts are parked for their owner.
- @HANDLE quote tokens are plain wrapped ETH with no owner and no admin.
- No custody. The site never holds funds or keys. Launches, trades and claims are transactions you sign yourself.
- The contracts are not upgradeable.
| Who | Can | Cannot |
|---|---|---|
| Anyone | launch under any handle; trade; harvest; tip a handle | redirect any share; touch reserves |
| Launcher | change their own payout wallet | touch the owner's or PairMention's share; pull liquidity |
| X account owner | claim once; change their wallet; withdraw accrued | — |
| Attester (server key) | sign a 10-minute claim authorization after X login | move funds; claim for anyone (your own transaction is required) |
| Contract owner | set treasury; set fee/split/curve parameters for future coins (fee ≤ 5%, treasury ≤ 50% of it); pause new launches; withdraw launch fees; rotate the attester | change an existing coin; block trades, harvests or claims; withdraw reserves or fees; upgrade code |
Status: the contracts have a full automated test suite (curve math, graduation continuity, refunds, fee split, permit sells, deferred payouts, claims). They have not yet had a third-party audit; we say so plainly rather than imply otherwise.
Contracts
Chain: Robinhood Chain (id 4663). Each coin has its own token, quote token and market contract, all linked from its page. Anyone can call buy, sell, harvest or claim directly on-chain without this website.
Risks
- Memecoins. Coins carry no rights and can go to zero. Every trade costs 1.5%; the first 3 seconds after launch carry a steep anti-snipe tax.
- Permissionless pairing. A coin under a handle does not imply the account owner's involvement or consent. The site labels every handle unclaimed until its owner claims.
- Thin liquidity. Early coins have little ETH behind them; prices move a lot on small trades.
- Not affiliated with Robinhood or X.
FAQ
Nothing is required of you. 0.75% of every trade on it is being set aside for you on-chain. Claim it whenever you like — or never.
No, and the site says so on every page. Claiming your fees is not an endorsement either.
No. There is no function that lets the contract owner, the attester or anyone else move a handle's share anywhere except to the wallet that proved ownership of that handle, and graduated liquidity has no exit at all.
The contracts keep working. Buy, sell, harvest and claim can all be called directly on-chain; nothing depends on this website.
Only to know where to send your share. The claim transaction is signed by you, costs a few cents in gas, and contains no approvals.
The claimed wallet can change the payout address with setWallet at any time. Claim with a wallet you will keep.
Yes — then you earn both the launcher share and, after claiming, the owner share.