{
  "$schema": "https://a2a-protocol.org/schemas/agent-card.json",
  "protocolVersion": "0.3.0",
  "name": "Helius Solana dApp Example",
  "description": "A Helius RPC showcase and clonable template for Solana developers — interactive demos of core RPC methods with copy-paste TypeScript and real mainnet data.",
  "url": "https://demo.helius.dev",
  "version": "1.0.0",
  "provider": {
    "organization": "Helius",
    "url": "https://www.helius.dev"
  },
  "documentationUrl": "https://demo.helius.dev/llms-full.txt",
  "openApiUrl": "https://demo.helius.dev/openapi.json",
  "iconUrl": "https://demo.helius.dev/icon-192.png",
  "preferredTransport": "JSONRPC",
  "defaultInputModes": ["text/plain", "application/json"],
  "defaultOutputModes": ["text/plain", "application/json", "text/markdown", "text/event-stream"],
  "capabilities": {
    "streaming": true,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "additionalInterfaces": [
    {
      "transport": "JSONRPC",
      "url": "https://demo.helius.dev/api/rpc",
      "description": "Solana JSON-RPC 2.0 proxy (single request or batch)."
    },
    {
      "transport": "JSONRPC",
      "url": "https://demo.helius.dev/api/v1/rpc",
      "description": "Versioned alias of /api/rpc — identical behavior."
    },
    {
      "transport": "REST",
      "url": "https://demo.helius.dev/api/helius/enhanced",
      "description": "Helius Enhanced Transactions REST API (parsed swaps, transfers, NFT events). Cursor + limit pagination."
    },
    {
      "transport": "SSE",
      "url": "https://demo.helius.dev/api/laserstream",
      "description": "Real-time Solana slot updates via Server-Sent Events."
    },
    {
      "transport": "NLWeb",
      "url": "https://demo.helius.dev/ask",
      "description": "NLWeb-compatible natural-language search over the demo content."
    }
  ],
  "versioning": {
    "strategy": "url-path",
    "currentVersion": "v1",
    "deprecationPolicy": "12 months minimum after deprecation; emits RFC 9745 Deprecation header on retired paths.",
    "openApiByVersion": {
      "v1": "https://demo.helius.dev/api/v1/openapi.json"
    }
  },
  "idempotency": {
    "header": "Idempotency-Key",
    "retentionHours": 24,
    "appliesTo": ["POST /api/rpc", "POST /api/v1/rpc", "POST /api/helius/enhanced"]
  },
  "skills": [
    {
      "id": "get-wallet-balance",
      "name": "Get wallet balance",
      "description": "Fetch SOL balance, all token holdings, or a specific SPL token for any Solana address using Helius RPC.",
      "tags": ["solana", "balance", "spl-token", "helius-rpc"],
      "examples": [
        "What is the SOL balance of address 4Nd1m...?",
        "Show all token balances for wallet ...",
        "How much USDC does this wallet hold?"
      ]
    },
    {
      "id": "list-wallet-assets",
      "name": "List wallet assets",
      "description": "Return every NFT and SPL token owned by a wallet via the Helius DAS API getAssetsByOwner method.",
      "tags": ["solana", "das-api", "nft", "portfolio"],
      "examples": [
        "List all NFTs owned by this wallet",
        "Show the full asset portfolio for address ..."
      ]
    },
    {
      "id": "get-transactions",
      "name": "Get transaction history",
      "description": "Fetch recent activity, filter by type, or paginate through a wallet's full transaction history.",
      "tags": ["solana", "transactions", "history"],
      "examples": [
        "Show recent transactions for this wallet",
        "Paginate the transaction history of address ..."
      ]
    },
    {
      "id": "get-nft-metadata",
      "name": "Get NFT and token metadata",
      "description": "Look up images, attributes, supply, and prices for NFTs, fungible tokens, and compressed NFTs via the DAS API.",
      "tags": ["solana", "nft", "metadata", "das-api"],
      "examples": [
        "Get metadata for this NFT mint",
        "Show the attributes of compressed NFT ..."
      ]
    },
    {
      "id": "inspect-program",
      "name": "Inspect on-chain program",
      "description": "Look up program account data, upgrade authority, IDL, and metadata for any Solana program.",
      "tags": ["solana", "program", "anchor", "idl"],
      "examples": [
        "Who is the upgrade authority for this program?",
        "Fetch the Anchor IDL for program ..."
      ]
    },
    {
      "id": "stream-blocks",
      "name": "Stream blocks in real time",
      "description": "Connect to the Helius Laserstream WebSocket for live slot, block, and transaction updates.",
      "tags": ["solana", "laserstream", "streaming", "websocket"],
      "examples": [
        "Stream new blocks as they are produced",
        "Subscribe to transactions for a specific program"
      ]
    },
    {
      "id": "fetch-archival-blocks",
      "name": "Fetch archival block data",
      "description": "Access historical block data from Solana's genesis onward using Helius archival nodes.",
      "tags": ["solana", "archival", "history"],
      "examples": [
        "Fetch block 0 from Solana",
        "Get the contents of block 12345678"
      ]
    },
    {
      "id": "phantom-connect",
      "name": "Phantom wallet integration",
      "description": "Integrate Phantom Connect: social login, browser extension, message signing, transactions, and staking.",
      "tags": ["solana", "phantom", "wallet", "auth"],
      "examples": [
        "How do I connect a Phantom wallet with social login?",
        "Show me how to sign a transaction with Phantom"
      ]
    },
    {
      "id": "compare-providers",
      "name": "Compare Solana RPC providers",
      "description": "Side-by-side feature and pricing comparison of Helius vs QuickNode, Alchemy, Triton, and Syndica across DAS API, Laserstream, webhooks, free tier, and priority fees.",
      "tags": ["solana", "rpc", "comparison", "alternatives", "pricing"],
      "examples": [
        "How does Helius compare to QuickNode for Solana?",
        "Helius vs Alchemy: which is better for NFT projects?",
        "What are the alternatives to Helius RPC?"
      ]
    }
  ],
  "securitySchemes": {
    "heliusApiKey": {
      "type": "apiKey",
      "in": "query",
      "name": "api-key",
      "description": "Helius API key obtained from https://dashboard.helius.dev/signup. Required for production use of underlying Helius RPC endpoints."
    }
  },
  "security": [{ "heliusApiKey": [] }]
}