Filter Killiane's content
Best practices to limit Gas Manager spend
Configure spend limits, allow/blocklists, and secure API keys with Alchemy’s Gas Manager. Protect your app from misuse and Sybil attacks with best practices!
Can reinforced transactions handle concurrent transactions?
Learn how Reinforced Transactions manage concurrent transactions and nonces.
Do reinforced transactions use ERC2771 meta-transactions?
Learn how Reinforced Transactions work without ERC2771 to improve transactions.
How are websockets priced?
Learn how Alchemy’s Websockets pricing is based on data usage.
How pending transaction WebSockets subscription work
Learn how pending transaction WebSockets capture transactions sent to Alchemy’s nodes.
Do WebSockets need a ping to stay alive with Alchemy?
Find out if WebSockets need a ping to stay connected with Alchemy.
Why is my WebSocket disconnecting or stopping listening?
Use the Alchemy SDK’s retry logic to handle WebSocket disconnections.
How are webhooks priced?
Learn how Alchemy’s Webhooks pricing is based on data usage.
How do I delete a webhook?
Easily delete webhooks in Alchemy using the dashboard or API!
How do I manage and add more addresses to a webhook?
Manage Alchemy webhooks, track up to 100,000 addresses and update larger lists via API!
How many Webhook can I create?
Create unlimited webhooks with Alchemy to track blockchain events!
What does the webhooks capacity limit error mean?
Learn what the webhook capacity limit error means and how to manage CU usage.
What happens to my webhooks when I hit my CU limit?
Learn what happens to your webhooks when you hit your CUs limit and how to unpause them.
What is Alchemy signature and where to find the auth token?
Learn about the x-alchemy-signature and where to find the auth token on your Dashboard.
Why am I getting 5xx errors repeatedly when setting up a webhook?
Fix repeated 5xx webhook errors by ensuring 2xx responses and optimizing your server.
Why am I not receiving activity after creating a webhook?
Troubleshoot missing webhook activity by testing your URL and sending notifications.
How are NFTs classified as “Spam” and why?
Alchemy flags spam NFTs for ERC721 violations, honeypot mints and dishonest supply
How can I update the NFTs metadata using Alchemy’s NFT API?
Quickly update NFT metadata with Alchemy’s invalidateContract and getNFTMetadata.
How is the floor price updated with getFloorPrice?
Discover how Alchemy’s getFloorPrice updates floor prices with caching and refresh intervals!
How to handle NFT API errors?
Learn about common NFT API errors, their causes and solutions for smoother integration!
How to resize NFT images and thumbnails with NFT API
Resize NFT images with Alchemy’s API while maintaining aspect ratios for optimal display.
NFT media caching: how Alchemy optimizes media delivery?
Discover how Alchemy speeds up NFT media loading with cached assets and optimized URLs.
Can I upgrade my subscription plan?
Learn how to easily upgrade to PAYG tier through the Dashboard and how to reach our sales team for Enterprise tier!
Can I use one Alchemy account for both personal apps and team apps?
Manage Alchemy projects easily with separate accounts for personal and team apps!
Does Alchemy support batch requests?
Explore Alchemy’s batch request limits, supported APIs, and best practices.