Taskmarket Onchain API

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.

Skills

• Verify Payment Receipt
  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).
  verificationreceiptonchainbaseusdcx402paid
• Read Wallet Balance
  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).
  balancewalleterc20onchainbaseusdcx402paid
• Check Transaction Status
  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).
  transactionreceiptstatusonchainbasex402paid
• List Address Activity
  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).
  activitytransferserc20addressonchainbaseusdcx402paid

How to call

https://taskmarket-x402.dynv6.net/a2a

Listed in

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