added

[March 27th, 2023] Added support for Polygon zkEVM chain

We have officially added support for Polygon zkEVM, get started by visiting Polygon zkEVM Quickstart.

removed

[Mar 17, 2023] Removed support for Crypto.org network

Starting on March 17, 2023 we no longer support existing and new accounts on Crypto.org. We have communicated this over email to impacted teams, and are adding here for posterity.

added

[Mar 2, 2023] Added 'indexed' block tag to Transfers API

We have added indexed as a block tag param for alchemy_getAssetTransfers. This block tag can be used instead of latest as the fromBlock or toBlock param. Under normal circumstances, indexed will have the same behavior as latest. However, under certain unusual situations such as a network fork or partial network outage, transfers data up to the latest block may not be available. In these cases, if latest is used as the toBlock, we will return an error; however with indexed, we will instead try to return whatever transfers data is available.

[Feb 27, 2023] Added support for Polygon, Arbitrum, and Optimism in NFT Activity webhooks

NFT Activity Webhooks are now supported on Polygon, Arbitrum, and Optimism mainnet and testnets.

added

[Jan 25, 2023] New endpoints - Transaction Simulation

We are excited to release alchemy_simulateAssetChanges and alchemy_simulateExecution. More below. 🎉

improved

[Jan 6, 2023] Increased limit for pending and mined transaction subscriptions

The address limit for alchemy_pendingTransactions and alchemy_minedTransactions WebSocket subscriptions has increased from 100 addresses to 1000 addresses.

deprecated

[November 11, 2022] Deprecating Unstoppable Domains API

We are very excited about Unstoppable Domains and the future of digital identities, but Unstoppable Domains is in the process of taking support for these APIs in-house. This is exciting news for all UD customers as it will allow for greater API flexibility and new features; but as part of that transition we will be deprecating Alchemy support for UD endpoints. For more information about how to use the Unstoppable Resolution Service API service, please visit the Unstoppable Domains developer hub.

removed

[Nov 8, 2022] Removed support for Flow network

Starting on November 8, 2022 we no longer support existing and new accounts on Flow. We have communicated this over email to impacted teams, and adding here for posterity. We recommend using the Flow’s public access api. For Flow NFT API’s the Flow team recommends the following options:

improved

[Nov 4, 2022] Breaking changes for NFT Transfer Activity Webhooks

We are adding wildcards for NFT Transfer Activity webhooks and moving to per block delivery.

added

[Nov 2, 2022] New endpoint getNFTMetadataBatch

The NFT API has a new getNFTMetadataBatch endpoint to conveniently fetch NFT metadata for a list of NFTs. Unlike other NFT API methods, this is a POST method that takes a list of tokens in the request body.