Swap SYN at the Best Rate

What is SYN?

SYN started as the token of a bridge. Synapse Protocol moved assets and messages between chains using validator-secured infrastructure and a cross-chain automated market maker, and by the team's own account it was the leading cross-chain messaging product by message count in 2022, earning millions in bridge fees in its first year.

The token's origin is a migration: the team behind Nerve Finance, a stableswap AMM launched on BNB Chain in March 2021, announced the evolution into Synapse on 23 August 2021 and converted each NRV into 2.5 SYN. The Ethereum contract is the canonical deployment, and the protocol's own bridge carries SYN to the other chains it supports.

How SYN is governed

SYN votes steer the Synapse DAO, which since proposal SIP-43 also calls itself the Cortex DAO and governs three products: the Synapse bridge, the Cortex trading interface and Hypercall, an options project on Hyperliquid announced in November 2025. Proposals need 550,000 SYN behind them to reach a vote, votes run on Snapshot across multiple chains, and passing requires a majority with a quorum of 2.25 million SYN.

SIP-43 approved merging the token into CX at a fixed 1 SYN to 5.5 CX. The transition was planned to complete by February 2026, but because exchanges and wallets did not adopt CX in that window, the team announced in November 2025 that SYN stays the main traded token and the two remain interchangeable through a two-way conversion portal with no deadline.

SYN supply and tokenomics

SYN's maximum supply is 250 million, a cap set at the Nerve migration that governance can change by vote. Emissions funded liquidity mining on the bridge's pools for years, and the DAO treasury holds SYN that is explicitly excluded from the CX conversion.

The CX arrangement now defines the token's supply story: every SYN can become 5.5 CX and back at a fixed rate, so the two float as one economic unit. New team allocations arrived only with CX, granted on a one-year cliff with four-year vesting according to the November 2025 holder update.

Who builds SYN

The core team has shipped under three names: Nerve Finance, Synapse and Cortex. In a November 2025 holder update it was blunt about why it moved on from bridging, arguing that neither bridge fees nor cross-chain messaging produced a sustainable business, and that its focus is now Hypercall, with Synapse infrastructure kept running but no longer the growth product.

What people use SYN for

Today SYN is mostly a governance and exposure instrument for the Cortex DAO's portfolio of products rather than a fee or gas asset.

• Voting on Synapse, Cortex and Hypercall proposals on Snapshot.
• Submitting proposals with the 550,000 SYN threshold.
• Converting to CX and back at the fixed 1 to 5.5 rate.
• Providing liquidity in SYN pairs on exchanges.

SYN risks and considerations

The team itself has said bridging did not work as a business, and its attention now sits with an options product whose success is unproven. Holding SYN is a bet on that pivot, on a DAO whose products span three brands, and on a token that runs in parallel with CX, an arrangement that can confuse pricing and liquidity.

Bridge infrastructure also remains a security-sensitive surface: cross-chain systems have historically been prime exploit targets, and SYN balances on chains other than Ethereum depend on the Synapse bridge itself. The supply cap is not immutable either, since a governance vote can raise it.