Launch Usdc Pair

Launch a pump.fun coin with USDC as the quote pair

Pump.fun enabled USDC as a quote mint for create and trade on 2026-05-21. This skill is the project-specific reference for wiring that into PumpKit code.

Critical facts

• USDC-paired coins can only be traded via V2 instructions. Legacy buy / sell instructions will reject them.
• SOL-paired coins still trade in native SOL, but the quote mint must be passed as the wrapped SOL mint (So11111111111111111111111111111111111111112) in V2 calls.
• Legacy instructions continue to work for SOL-paired coins.
• Authoritative spec: pump-fun/pump-public-docs.

USDC mint (mainnet)

EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v

(Devnet has its own USDC mint — confirm before using in tests.)

When to reach for this skill

Reach for it any time:

• A user asks to launch with a non-SOL quote.
• An existing call site uses V1 buy / sell and you need to migrate it to V2 to support USDC pairs.
• The codebase passes a quoteMint parameter without distinguishing SOL vs USDC.

Workflow

1. Decide which V2 instructions you need

2. Confirm the SDK exposes V2 typed decoders

ls node_modules/@nirholas/pump-sdk/dist | grep -i v2

Recent commits (refactor(channel): use typed V2 event decoders from @nirholas/pump-sdk) moved channel + event-monitor onto V2 — use those files as a working reference:

• packages/channel/src/
• packages/core/src/monitor/ (V2 events flow through these)

3. Wire up quote-mint awareness

The shape of the quote_mint argument in V2 calls is what determines the pair. Don't try to infer it from the coin mint — pass it explicitly.

import { PublicKey } from '@solana/web3.js';

const WSOL_MINT = new PublicKey('So11111111111111111111111111111111111111112');
const USDC_MINT = new PublicKey('EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v');

// User-selected pair:
const quoteMint = pairChoice === 'USDC' ? USDC_MINT : WSOL_MINT;

4. Mint keypair for the launch token

The launch coin still needs its own mint. Use the project's vanity wrapper:

bash tools/generate-vanity.sh --suffix pump <prefix>

Confirm the on-chain create_v2 instruction's mint-suffix constraint against the public-docs repo before grinding — the convention has historically been pump suffix, but a USDC-pair launch may relax or change that.

5. Verify funding before broadcasting

npx tsx tools/check-pump-funding.ts <deployer-pubkey>

If the deployer was seeded by pump.fun's wallet, the deployment is a leaked-launch (see tmp/leaked-launch/ scratch workflow). For a fresh organic launch, the deployer should not be pump-seeded.

6. Test on devnet first

Both create_v2 and the USDC pair are live on mainnet as of 2026-05-21, but the program may not have been deployed to devnet at the same time. Confirm with:

solana program show <PROGRAM_ID> --url devnet

Common mistakes to avoid

• Calling legacy buy on a USDC-paired coin. It will fail. Use V2.
• Passing the coin's mint as quote_mint. The quote mint is the pair currency (USDC or WSOL), not the launched coin.
• Assuming SOL pairs need no change. They still work with legacy instructions, but new V2 callers must pass WSOL as the quote mint.
• Grinding a mint without the pump suffix. Check the program's current constraint — don't waste hours of CPU on an address the program will reject.

Local references

• CLAUDE.md — project memory, V2/USDC section
• tutorials/46-usdc-pair-launches.md — step-by-step USDC launch
• tutorials/47-v2-creator-fees.md — V2 creator-fee collection & sharing
• tutorials/06-migration.md — graduation/migration deep dive