Taskmarket Onchain API

{
  "name": "Taskmarket Onchain API",
  "description": "On-chain facts for agents, paid per call with x402 (USDC on Base): verify a payment receipt (MATCH/MISMATCH), read a decoded wallet balance, check a transaction's status, or list an address's recent ERC-20 transfers. All reads come from free public RPCs; no accounts or API keys. Free discovery surfaces: MCP (Streamable HTTP) at https://taskmarket-x402.dynv6.net/mcp, this A2A JSON-RPC endpoint at https://taskmarket-x402.dynv6.net/a2a, plus /health, /openapi.json, /.well-known/x402, /.well-known/mcp.json and /demo.",
  "url": "https://taskmarket-x402.dynv6.net/a2a",
  "version": "1.1.0",
  "documentationUrl": "https://taskmarket-x402.dynv6.net/",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "extendedAgentCard": false
  },
  "authentication": {
    "schemes": [
      "none"
    ]
  },
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "text/plain",
    "application/json"
  ],
  "skills": [
    {
      "id": "verify-receipt",
      "name": "Verify Payment Receipt",
      "description": "Verify an on-chain payment/transfer against an expected recipient and amount. Paid $0.02 USDC on Base via x402 v2 (exact); an unpaid call returns HTTP 402 with the payment terms (accepts array).",
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "verification",
        "receipt",
        "onchain",
        "base",
        "usdc",
        "x402",
        "paid"
      ],
      "examples": [
        "Did 0x… transfer 1.50 USDC to 0x…? Check transaction 0x… on Base.",
        "{\"chain\":\"base\",\"txHash\":\"0x<64 hex>\",\"expectedRecipient\":\"0x…\",\"expectedAmount\":\"1.50\"}"
      ]
    },
    {
      "id": "wallet-balance",
      "name": "Read Wallet Balance",
      "description": "Read a decoded wallet balance (native, USDC, or any ERC-20). Paid $0.01 USDC on Base via x402 v2 (exact); an unpaid call returns HTTP 402 with the payment terms (accepts array).",
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "balance",
        "wallet",
        "erc20",
        "onchain",
        "base",
        "usdc",
        "x402",
        "paid"
      ],
      "examples": [
        "What is the USDC balance of 0x… on Base?",
        "{\"chain\":\"base\",\"address\":\"0x…\",\"token\":\"USDC\"}"
      ]
    },
    {
      "id": "tx-status",
      "name": "Check Transaction Status",
      "description": "Get the status, block, from/to, value, gas used and timestamp of a transaction. Paid $0.01 USDC on Base via x402 v2 (exact); an unpaid call returns HTTP 402 with the payment terms (accepts array).",
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "transaction",
        "receipt",
        "status",
        "onchain",
        "base",
        "x402",
        "paid"
      ],
      "examples": [
        "What is the status of transaction 0x… on Base?",
        "{\"chain\":\"base\",\"txHash\":\"0x<64 hex>\"}"
      ]
    },
    {
      "id": "address-activity",
      "name": "List Address Activity",
      "description": "List recent ERC-20 transfers involving an address (bounded, newest first). Paid $0.02 USDC on Base via x402 v2 (exact); an unpaid call returns HTTP 402 with the payment terms (accepts array).",
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ],
      "tags": [
        "activity",
        "transfers",
        "erc20",
        "address",
        "onchain",
        "base",
        "usdc",
        "x402",
        "paid"
      ],
      "examples": [
        "Show the recent ERC-20 transfers for address 0x… on Base.",
        "{\"chain\":\"base\",\"address\":\"0x…\",\"token\":\"USDC\",\"limit\":20}"
      ]
    }
  ]
}