Cryptocurrency — entry 004 of 53
Alchemy Ethereum
Alchemy operates managed, load-balanced Ethereum nodes behind a JSON-RPC and WebSocket API, layered with higher-level Node, NFT, and Transfers APIs plus a GraphQL layer added through its 2023 acquisition of the subgraph-indexing platform Satsuma. Usage is metered in compute units, with a free developer tier and pay-as-you-go pricing beyond it, and the same API key reaches dozens of other chains Alchemy has added since its Ethereum-only start.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSON, WebSocket, GraphQLResponses can be requested as JSON or WebSocket or GraphQL.
GreatAPIs Score
Score81
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats15/15Supports 3 response formats
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/alchemy-ethereum/"><img src="https://greatapis.com/badge/alchemy-ethereum.svg" alt="Scored 81 on greatapis.com"></a>Auth quickstart
- Get a key at the provider
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Try it
Developer reference
Base URL
https://eth-mainnet.g.alchemy.com/v2/{apiKey}Rate limit
Compute-unit metered; free tier 25 req/s, 30M CU/month
Key endpoints
- POST/ (eth_blockNumber)
- POST/ (eth_getBalance)
SDKs