Server data from the Official MCP Registry
Decode EVM bytes to JSON: event-log decoder, calldata explainer, selector lookup, ABI fetch.
About
Decode EVM bytes to JSON: event-log decoder, calldata explainer, selector lookup, ABI fetch.
Remote endpoints: streamable-http: https://decode.fabtally.com/mcp
Security Report
FabTally Decode is a well-designed, security-conscious MCP server that fronts a paid decoding API. The codebase demonstrates proper error handling, no credential storage, and appropriate input validation via Zod schemas. The server is stateless, read-only, and explicitly avoids holding private keys. Minor code quality observations (broad exception handling, loose `any` types) do not materially impact security. Supply chain analysis found 3 known vulnerabilities in dependencies (0 critical, 3 high severity).
5 files analyzed · 6 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
FabTally Decode — MCP server
Developer on-chain decoding reads that turn raw EVM bytes into human-readable JSON — the capability buried inside $49-999/mo RPC plans. Fronts the Decode HTTP API at https://decode.fabtally.com. Holds no private key.
Tools (all paid; a call with no payment returns the decoded x402 402 challenge)
| Tool | Price | What it does |
|---|---|---|
decode_log | $0.003 | Flagship. Decode event LOGS to JSON. {chain, tx_hash} decodes every log in a tx, or {chain, address, topics[], data} a single log; optional abi. Returns event name + canonical signature + named/typed args — handling tuple/array/nested params, anonymous events, indexed vs non-indexed. Resolves ABI via Sourcify/Blockscout + 4byte when none is given. |
decode_calldata | $0.002 | Decode a function call. {chain, to?, data, abi?} → selector resolved to a function signature (provided ABI / verified source / 4byte.directory) + fully decoded typed arguments. |
selector_lookup | $0.001 | Resolve a 4-byte function selector (0x+8 hex) or a 32-byte event topic (0x+64 hex) to human signature(s) via 4byte.directory + openchain.xyz, with a verified flag. |
abi_fetch | $0.002 | Fetch a contract's verified ABI + metadata (Sourcify/Blockscout) + verification status + full proxy-implementation resolution (EIP-1967/1822/OZ-legacy/beacon) — returns the implementation ABI for proxies. Args: address, chain. |
Chains: ethereum, base, arbitrum, optimism, polygon, bsc.
Every tool also accepts an optional x_payment (base64 x402 payload) that is
forwarded as the X-PAYMENT header to settle the call and return the real result.
Humans can instead prepay by card and use an X-FabTally-Key credit key against
the HTTP API.
Transports
- stdio (portable):
npx fabtally-decode-mcp(bin:fabtally-decode-mcp) - streamable-http (hosted):
https://decode.fabtally.com/mcp
Config: FABTALLY_DECODE_BASE (default https://decode.fabtally.com).
Read-only, keyless, stateless, descriptive. Operated by Sunstone Soft (fabtally.com). Not a security guarantee or financial advice.
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