
Changee
Changee is a no-signup crypto swap service that routes orders across liquidity providers for fixed or floating rates on 200+ pairs.

What is Changee?
Changee lets users exchange cryptocurrencies straight from their own wallet, with no account required. The platform routes each order through partnered liquidity providers, supports both fixed and floating rates across more than 200 trading pairs, and exposes an API for partners who want to embed exchange flows or earn referral commissions.
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Developer resources from Alchemy

The cost of latency in onchain trading
Latency costs show up as the gap between observed state and execution. Here's where delay appears, why p95 matters, and how to evaluate your RPC path.
How Collector Crypt put nearly $40M of trading cards onchain with Alchemy
Collector Crypt runs the settlement layer for collectible real-world assets on Alchemy Solana RPC and Webhooks, with nearly $40M in tokenized trading card inventory onchain.

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.
Changee alternatives
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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.

