OneSource Web3 API Reference

GraphQL Endpoints

The OneSource Web3 API receives requests at the following endpoint URLs:

• Avalanche C-Chain: https://api.onesource.io/federation/avax/graphql
• Base: https://api.onesource.io/federation/base/graphql
• Ethereum Mainnet: https://api.onesource.io/federation/ethereum/graphql
• Optimism: https://api.onesource.io/federation/optimism/graphql
• Sepolia Testnet: https://api.onesource.io/federation/sepolia/graphql
• Shape: https://api.onesource.io/federation/shape/graphql

Using the API Reference

When using the API Reference, it may be helpful to refer to the GraphQL documentation for information on GraphQL terms and concepts.

Defined below are terms as they relate to this API Reference.

Queries

The root Type that is the entry point for all read operations.

Term	Description
Arguments	Customizes Query behavior.
Return Type	Usually an Object, what constitutes a response to a Query.

Types

Types define the shape and structure of the data received in response to a Query.

Term	Description
Fields	A unit of data that can be requested from a Type.
Member Of	The schema components of which this Type is a constituent.
Returned By	The Types that return this Type as a response.
Values	Predefined, named constants that represent the only valid options for a Field or Argument.