Onchain Evidence

Try before payment

Inspect a representative partial result, exact price and copy-ready upgrade instructions. No wallet, signature or payment required.

Copy-ready MCP call

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "onchain_evidence",
    "arguments": {"source_urls":["https://base.blockscout.com/api/v2/blocks"],"subject":{"network":"eip155:8453"}}
  }
}

What the agent receives

Source-bound observations and hashes; no unsupported chain-finality assertion.

No API key or subscription. The first paid request returns HTTP 402 payment requirements; an x402 client signs and retries automatically.