
FixedFloat
FixedFloat is an instant non-custodial cryptocurrency exchange supporting Bitcoin Lightning and 80+ assets with fixed or floating rates.

What is FixedFloat?
FixedFloat is an automated cryptocurrency swap service that lets users exchange between Bitcoin, Ethereum, Litecoin, USDT and other assets without creating an account. Users pick fixed or floating rates, send funds to a generated address, and receive the swap within minutes. The service supports Bitcoin Lightning and multiple networks for transparent low-fee swaps.
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Developer resources from Alchemy

Solana archival data: how to query full block and transaction history
Solana archival data explained: why nodes prune history, which RPC methods need archival access, and how to query full block and transaction history at scale.

Introducing historical Solana token balances
getTokenAccountsByOwnerAtSlot returns everything a wallet held at any past point in time, with exact balances, in a single call.

How Slingshot built cross-chain trading with Webhooks
Slingshot 2.0 supports instant trading of over 300K tokens across Solana, Ethereum, and various L2s. What sets them apart? Users can trade any token across any chain without worrying about bridging or gas fees - all powered by Alchemy Webooks.
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App store listings are independently reviewed and written by Alchemy using a combination of inbound submissions, editorial research, public project sources, and third-party directories, including ecosystem data from The Grid under the Open Database License, DefiLlama, DappRadar, Reown, and chain ecosystem pages.

