Stablecoin 1:1

Stablecoin 1:1 executes like-for-like stablecoin swaps at par. A user who sends 100,000 USDC receives 100,000 USDT, rather than whatever a liquidity pool happens to quote for that size.

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The problem

Two stablecoins that track the same dollar are economically the same asset, but a standard swap doesn’t treat them that way. The trade routes through pool liquidity, and the pool charges for it: a fee tier, price impact against available depth, and slippage between quote and execution. A USDC-to-USDT move that should be flat comes back a few basis points short. That leakage scales with size and frequency. On a payments or treasury flow, a few basis points per hop is often the entire margin, and it is paid again every time funds are rebalanced.

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How LI.FI solves it

For an eligible pair, LI.FI prices the swap at par instead of routing it through pool liquidity. The amount out is fixed to the amount in at quote time, and the rate doesn’t move with trade size, so a large transfer receives the same rate as a small one. Fees, where they apply, are charged and shown separately from the rate. The 1:1 guarantee is on the exchange rate, not a claim that the transfer is free. See Dynamic Pricing for how stablecoin flows are priced.

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How it works

LI.FI guarantees the rate by working with solvers through LI.FI Intents, LI.FI’s intent and solver marketplace. Solvers quote eligible stablecoin pairs at par and commit to filling at that rate, so what you receive is a commitment rather than an estimate that can move by the time the trade settles. Par pricing is one of the fill terms agreed with solvers. The same arrangement covers the other SLAs LI.FI holds solvers to on eligible flow, including fill reliability and settlement time.

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What you see as an integrator

• The standard quote and route flow. When Stablecoin 1:1 is enabled for your integrator key, eligible pairs are priced at par in the quote you already request. There’s no separate endpoint and no new request field.
• A fixed output amount. The quoted amount out matches the amount in for the pair, net of any fee shown on the quote. Price impact on the rate is zero, so there’s nothing for a slippage tolerance to protect against.
• A normal fallback. A pair, chain, or size that isn’t eligible is quoted through standard routing with the usual pricing and slippage behavior. Read the quoted rate rather than assuming par.

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Scope

• Like-for-like stablecoins only. Both sides must track the same unit of account. Stablecoin-to-volatile-asset trades are out of scope and are priced normally.
• Eligible pairs and chains are confirmed per integrator. Coverage depends on which stablecoins and chains you move, and is agreed when the feature is enabled.
• Par pricing assumes both assets hold their peg. LI.FI does not quote at par against an asset trading away from its peg.

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Availability

Stablecoin 1:1 is an enterprise feature, enabled per integrator.

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For stablecoin issuers

If you issue a stablecoin, LI.FI can enable 1:1 pricing for it on the LI.FI API. Users across the wallets, exchanges, and fintech apps integrated with LI.FI then move into and out of your token at par, instead of paying pool-driven leakage on every swap that touches it. Setup is per asset. LI.FI’s team agrees the eligible pairs, the chains, and the fill terms with you and the solver network.