> ## Documentation Index > Fetch the complete documentation index at: https://www.helius.dev/docs/llms.txt > Use this file to discover all available pages before exploring further. # getAssetProof > Retrieve the Merkle proof for a compressed Solana NFT required for verification and on-chain operations like transfers and burns ## Request Parameters The unique identifier (mint address) of the compressed Solana NFT to retrieve the merkle proof for. ## OpenAPI ````yaml openapi/das-api/getAssetProof.yaml POST / openapi: 3.1.0 info: title: Solana Compressed NFT Verification API version: 1.0.0 description: > Advanced Solana Digital Asset Standard (DAS) API for retrieving cryptographic merkle proofs for compressed NFTs on the Solana blockchain. This specialized verification API enables applications to validate compressed assets using state proofs without requiring the full on-chain data, supporting efficient ownership verification for compressed NFTs with up to 1000x cost savings compared to traditional NFTs. license: name: Apache 2.0 url: https://www.apache.org/licenses/LICENSE-2.0.html servers: - url: https://mainnet.helius-rpc.com description: Mainnet RPC endpoint - url: https://devnet.helius-rpc.com description: Devnet RPC endpoint security: [] paths: /: post: tags: - RPC summary: getAssetProof description: > Retrieve the cryptographic merkle proof for a compressed Solana NFT or token. This verification API returns the complete proof path required to validate a compressed digital asset's existence and data integrity on the Solana blockchain without storing the full asset data on-chain. Essential for marketplaces, wallets, and applications that need to verify ownership and authenticity of compressed NFTs with the security guarantees of traditional on-chain assets but at a fraction of the storage cost. operationId: rpc requestBody: content: application/json: schema: type: object required: - jsonrpc - id - method - params properties: jsonrpc: type: string enum: - '2.0' description: The version of the JSON-RPC protocol. default: '2.0' id: type: string description: An ID to identify the request. default: '1' method: type: string enum: - getAssetProof description: The name of the DAS method to invoke. default: getAssetProof params: type: object default: id: Bu1DEKeawy7txbnCEJE4BU3BKLXaNAKCYcHR4XhndGss required: - id properties: id: type: string description: >- The unique identifier (mint address) of the compressed Solana NFT to retrieve the merkle proof for. example: Bu1DEKeawy7txbnCEJE4BU3BKLXaNAKCYcHR4XhndGss responses: '200': description: Successful response content: application/json: schema: type: object properties: last_indexed_slot: type: integer description: >- All data up to and including this slot is guaranteed to have been indexed. example: 365750752 root: type: string description: >- The root hash of the Solana state compression merkle tree that contains this compressed NFT. example: 2o6Y6EiY3WXhoaEpei2pHmHLYnHDcEQVhgD89GrGHDBH proof: type: array description: >- The array of merkle proof hashes needed to cryptographically verify this Solana compressed NFT exists in the tree. items: type: string example: - EmJXiXEAhEN3FfNQtBa5hwR8LC5kHvdLsaGCoERosZjK - 7NEfhcNPAwbw3L87fjsPqTz2fQdd1CjoLE138SD58FDQ - 6dM3VyeQoYkRFZ74G53EwvUPbQC6LsMZge6c7S1Ds4ks - A9AACJ5m7UtaVz4HxzhDxGjYaY88rc2XPoFvnoTvgYBj - 2VG5cKeBZdqozwhHGGzs13b9tzy9TXt9kPfN8MzSJ1Sm - 3E1uFze4pi6BnTZXMsQbeh3jQCeDi966Zax9aMbYgg2D - Bx9PdctdWCeC1WfU6dwP49idsXCYhqyxbRLyLwwGhr61 - HSbJ8quT4vuXFgf5FnjzeUuFfAtLKsq6W1Frj8y1qrif - GJMLzL4F4hY9yFHY1EY6XRmW4wpuNGeBZTiv7vM2mYra - FYPtEiqmRx6JprHQvWeEWEuVp3WA7DPRCE4VbhFRVuAj - 6MJKrpnK1GbYsnEzwMRWStNGkTjAZF23NhzTQSQVXsD3 - HjnrJn5vBUUzpCxzjjM9ZnCPuXei2cXKJjX468B9yWD7 - 4YCF1CSyTXm1Yi9W9JeYevawupkomdgy2dLxEBHL9euq - E3oMtCuPEauftdZLX8EZ8YX7BbFzpBCVRYEiLxwPJLY2 node_index: type: integer description: >- The position index of this compressed NFT in the Solana merkle tree structure. example: 16384 leaf: type: string description: >- The leaf hash representing this compressed NFT's data in the Solana merkle tree. example: 6YdZXw49M97mfFTwgQb6kxM2c6eqZkHSaW9XhhoZXtzv tree_id: type: string description: >- The unique identifier of the Solana merkle tree where this compressed NFT is stored. example: 2kuTFCcjbV22wvUmtmgsFR7cas7eZUzAu96jzJUvUcb7 burnt: false '204': description: No content. '400': description: >- Bad Request. The server could not understand the request due to invalid syntax. content: application/json: schema: type: object properties: jsonrpc: type: string example: '2.0' error: type: object properties: code: type: integer example: -32602 message: type: string example: Invalid request parameters. id: type: string example: '1' '401': description: >- Unauthorized. The client must authenticate itself to get the requested response. content: application/json: schema: type: object properties: jsonrpc: type: string example: '2.0' error: type: object properties: code: type: integer example: -32001 message: type: string example: Authentication failed. Missing or invalid API key. id: type: string example: '1' '403': description: Forbidden. The client does not have access rights to the content. content: application/json: schema: type: object properties: jsonrpc: type: string example: '2.0' error: type: object properties: code: type: integer example: -32003 message: type: string example: You do not have permission to access this resource. id: type: string example: '1' '404': description: Not Found. The server can not find the requested resource. content: application/json: schema: type: object properties: jsonrpc: type: string example: '2.0' error: type: object properties: code: type: integer example: -32004 message: type: string example: Asset proof not found for the specified ID. id: type: string example: '1' '429': description: >- Too Many Requests. The user has sent too many requests in a given amount of time. content: application/json: schema: type: object properties: jsonrpc: type: string example: '2.0' error: type: object properties: code: type: integer example: -32029 message: type: string example: Rate limit exceeded. Please try again later. id: type: string example: '1' '500': description: >- Internal Server Error. The server has encountered a situation it doesn't know how to handle. content: application/json: schema: type: object properties: jsonrpc: type: string example: '2.0' error: type: object properties: code: type: integer example: -32000 message: type: string example: An unexpected error occurred on the server. id: type: string example: '1' security: - ApiKeyQuery: [] components: securitySchemes: ApiKeyQuery: type: apiKey in: query name: api-key description: >- Your Helius API key. You can get one for free in the [dashboard](https://dashboard.helius.dev/api-keys). ````