All servers · Agent payments (x402) · Crypto & blockchain

FabTally Decode

io.github.zvmzaretsky/onchain-decode · v1.0.0

Measured by MCP Station

Description written by the publisher, not verified

Decode EVM bytes to JSON: event-log decoder, calldata explainer, selector lookup, ABI fetch.

Connect

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

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

Tools as reported by the server

• 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/typed args — correctly
• 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/nested included). Without
• 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 returns the x402 cha
• 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-legacy/beacon) — return

Repository · Website · JSON · Text for agents · Registry updated 2026-08-01