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0xAPI gives developers fast, structured access to on-chain data across multiple networks. Designed for reliability and ease of use, it offers targeted endpoints for core blockchain entities like:
  • tokens,
  • NFTs,
  • transactions,
  • blocks,
  • wallets, and
  • events

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Prerequisites

Before you begin, make sure you have:

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Get started

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Step 1: Identify the base URL

The base URL for all requests is: 
https://api.data.ormilabs.com/
Each query starts with this base URL, followed by a specific endpoint path.

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Step 2: Add the endpoint path

0xGraph API Keys
For example, to fetch block data from Ethereum mainnet: 
/v2/eth-mainnet/blocks

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Resources

⛓
Find supported chains

See all the supported chains for chain_name

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Find endpoint path

Check out the API reference to find each endpoint’s path.

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Step 3: Include query parameters

Use query parameters to customize your request and narrow down the results. Common examples include filtering by wallet address, limiting response size, or selecting specific block ranges. 
?wallet_address=0x...&limit=20&from_block=10000000
0xGraph API Keys
Each endpoint supports its own parameter set - see the API Reference for details.

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Step 4: Add authentication headers

Authorization: Bearer YOUR_API_KEY

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Step 5: Make the request

Use your REST client to send a GET request to the constructed URL. Below is a minimal example using curl: 
curl --request GET \
  --url https://api.data.ormilabs.com/v2/{chain_name}/blocks \
  --header 'Authorization: Bearer <token>'
Replace <token> with your API key and {chain_name} with the network you’re querying (ex. eth-mainnet).

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Next steps

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How to query Data API

Learn how to perform a query on a REST endpoint to retrieve onchain data.

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See API reference

Learn how to retrieve wallet, token, and transaction-level data with structured, low-latency endpoints.

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