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Welcome to the Voltr REST API. This API provides developers with the tools to query on-chain and off-chain vault data, calculate metrics, and construct transactions for interacting with Voltr vaults.

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Base URL

All API endpoints are relative to: https://api.voltr.xyz

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Authentication

The Voltr API is public and does not require an API key for access.

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Key Concept: Transaction Building

A critical feature of the Voltr API is its approach to transaction creation. Instead of executing transactions on the server, the API builds and returns an unsigned, serialized versioned transaction as a base58 encoded string. This design ensures that user private keys are never required on the backend, maintaining a non-custodial and secure user experience.

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Typical Workflow

1

Request

Your application sends a POST request to a transaction creation endpoint (e.g., /vault/{pubkey}/deposit).
2

Receive

The API returns a JSON response containing the serialized transaction string.
3

Sign & Send

Your client-side application deserializes this string, signs it with the user’s wallet, and sends it to the Solana network.
{
  "success": true,
  "transaction": "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAI..."
}

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Interactive Documentation

For live testing and a detailed, interactive view of all endpoints, visit the Swagger documentation:

Swagger API Docs

Interactive API documentation with live testing