FabTally Decode

Connect Remote server

claude mcp add --transport http onchain-decode https://decode.fabtally.com/mcp

{
  "mcpServers": {
    "onchain-decode": {
      "url": "https://decode.fabtally.com/mcp"
    }
  }
}

{
  "servers": {
    "onchain-decode": {
      "type": "http",
      "url": "https://decode.fabtally.com/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://decode.fabtally.com/mcp

Tools 4 found in our last check

• decode_log

  PAID $0.003 (x402, USDC on Base). FLAGSHIP: decode EVM event LOGS to human-readable JSON. Give {chain, tx_hash} to decode every log in a transaction, OR {chain, address, topics[], data} for a single log; optional {abi}. Returns each event's name, canonical signature and named/ty…

• decode_calldata

  PAID $0.002 (x402, USDC on Base). Decode a contract function call. Give {chain, to?, data, abi?}; get the 4-byte selector resolved to a function signature (via provided ABI, the verified contract source, or 4byte.directory) plus fully decoded, typed arguments (tuples/arrays/nest…

• selector_lookup

  PAID $0.001 (x402, USDC on Base). Resolve a 4-byte function selector (0x + 8 hex) OR a 32-byte event topic hash (0x + 64 hex) to its human-readable signature(s) via 4byte.directory + openchain.xyz. Returns all matches (selectors can collide) with a verified flag. Without payment…

• abi_fetch

  PAID $0.002 (x402, USDC on Base). Fetch the verified ABI + metadata for a contract. Give {address, chain}; get the ABI JSON, verification status/source (Sourcify or Blockscout), the callable function/event signatures, and full proxy-implementation resolution (EIP-1967/1822/OZ-le…

Details

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