> ## 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. # getCompressedAccountProof > Returns a proof the compression program uses to verify that the account is valid. ## Request Parameters A 32-byte cryptographic hash represented as a base58 string, uniquely identifying a Solana compressed account. ## OpenAPI ````yaml openapi/zk-compression/getCompressedAccountProof.yaml POST / openapi: 3.0.3 info: title: Solana Compressed Account Verification API description: > Advanced Solana indexer for verifying compressed accounts using merkle proofs. This specialized verification API enables applications to cryptographically validate the existence and data integrity of compressed NFTs and token accounts on the Solana blockchain through efficient merkle proof verification, supporting the secure usage of state compression technology that reduces on-chain storage costs by up to 1000x compared to traditional accounts. license: name: Apache-2.0 url: https://www.apache.org/licenses/LICENSE-2.0.html version: 0.50.0 servers: - url: https://mainnet.helius-rpc.com description: Mainnet RPC endpoint - url: https://devnet.helius-rpc.com description: Devnet RPC endpoint security: [] paths: /: summary: getCompressedAccountProof post: description: > Retrieve the cryptographic merkle proof for a specific compressed Solana account. This verification endpoint returns the complete proof path needed to validate a compressed NFT or token account's existence and data integrity on the Solana blockchain without requiring the full account data to be stored on-chain. Essential for wallet applications, marketplaces, and DeFi protocols that need to verify ownership and authenticity of compressed assets while benefiting from Solana's breakthrough state compression technology for dramatic cost reductions. operationId: getCompressedAccountProof requestBody: content: application/json: schema: type: object required: - jsonrpc - id - method - params properties: jsonrpc: type: string description: The version of the JSON-RPC protocol. enum: - '2.0' default: '2.0' id: type: string description: An ID to identify the request. default: '1' method: type: string description: >- The name of the method to invoke for retrieving Solana compressed account proof data. enum: - getCompressedAccountProof default: getCompressedAccountProof params: type: object required: - hash properties: hash: $ref: '#/components/schemas/Hash' description: >- The hash of the Solana compressed account to retrieve the proof for required: true responses: '200': description: >- Successfully retrieved merkle proof for the requested Solana compressed account content: application/json: schema: type: object required: - context - value properties: context: $ref: '#/components/schemas/Context' value: $ref: '#/components/schemas/MerkleProofWithContext' additionalProperties: false '400': description: Bad Request - Invalid request parameters or malformed request. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: jsonrpc: '2.0' error: code: -32602 message: Invalid params id: '1' '401': description: Unauthorized - Invalid or missing API key. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: jsonrpc: '2.0' error: code: -32001 message: Unauthorized id: '1' '429': description: Too Many Requests - Rate limit exceeded. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: jsonrpc: '2.0' error: code: -32005 message: Too many requests id: '1' '500': description: Internal Server Error - An error occurred on the server. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: jsonrpc: '2.0' error: code: -32603 message: Internal error id: '1' '503': description: Service Unavailable - The service is temporarily unavailable. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: jsonrpc: '2.0' error: code: -32002 message: Service unavailable id: '1' '504': description: Gateway Timeout - The request timed out. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: jsonrpc: '2.0' error: code: -32003 message: Gateway timeout id: '1' security: - ApiKeyQuery: [] components: schemas: Hash: type: string description: >- A 32-byte cryptographic hash represented as a base58 string, uniquely identifying a Solana compressed account. example: 11111112cMQwSC9qirWGjZM6gLGwW69X22mqwLLGP Context: type: object required: - slot properties: slot: type: integer default: 100 example: 100 description: >- Current Solana blockchain slot for this compressed account proof request MerkleProofWithContext: type: object required: - proof - root - leafIndex - hash - merkleTree - rootSeq properties: hash: $ref: '#/components/schemas/Hash' description: >- The unique hash identifier of the Solana compressed account being verified leafIndex: type: integer format: int32 minimum: 0 description: >- The position index of this compressed account in the Solana merkle tree structure merkleTree: $ref: '#/components/schemas/SerializablePubkey' description: >- The address of the Solana merkle tree where this compressed account is stored proof: type: array items: $ref: '#/components/schemas/Hash' description: >- Array of hashes forming the merkle proof path to verify this Solana compressed account root: $ref: '#/components/schemas/Hash' description: >- The root hash of the Solana merkle tree containing this compressed account rootSeq: type: integer format: int64 minimum: 0 description: >- The sequence number of the root in the Solana merkle tree for version tracking additionalProperties: false ErrorResponse: type: object properties: jsonrpc: type: string description: The JSON-RPC protocol version. enum: - '2.0' example: '2.0' error: type: object properties: code: type: integer description: The error code. example: -32602 message: type: string description: The error message. data: type: object description: Additional data about the error. id: type: string description: Identifier matching the request. example: '1' SerializablePubkey: type: string description: >- A Solana public key represented as a base58 string, used to identify merkle trees and accounts. default: 11111117353mdUKehx9GW6JNHznGt5oSZs9fWkVkB example: 11111117353mdUKehx9GW6JNHznGt5oSZs9fWkVkB 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). ````