MCP.Market

FabTally Decode MCP server

online · 100% uptime
by zvmzaretsky·io.github.zvmzaretsky/onchain-decode·v1.0.0
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Decode EVM bytes to JSON: event-log decoder, calldata explainer, selector lookup, ABI fetch.

A87/100grade A
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Safety scan
A87/100

full report

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FabTally Decode tools (4)

write = sends, deletes, buys or posts
  • abi_fetchFree

    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) — returning the implementation's ABI when it's a proxy. Without payment returns the x402 challenge; pass x_payment to settle.

  • decode_calldataFree

    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 payment returns the x402 challenge.

  • decode_logFree

    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 handling tuple/array/nested params, anonymous events, and indexed vs non-indexed. Resolves the ABI via Sourcify/Blockscout + 4byte event signatures when none is supplied. Without payment returns the x402 challenge; pass x_payment to settle.

  • selector_lookupFree

    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 challenge; pass x_payment to settle.

Public scan report

scanner v0.1.9 · 2026-09-24 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 1121ms20/20
  • Tool poisoning4 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 54 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 87/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How FabTally Decode compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
87/100
higher than 73% of 48,255 servers
Tools
4
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
72 ms
faster than 89% of 30,031 servers

What its tools let an agent do: 4 read

Install FabTally Decode in Claude Code, Cursor or VS Code

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

What the publisher says

From the FabTally Decode repository's README, as published. We do not edit it. Read it on GitHub

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)

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: FABTALLYDECODEBASE (default https://decode.fabtally.com).

Read-only, keyless, stateless, descriptive. Operated by Sunstone Soft (fabtally.com). Not a security guarantee or financial advice.

Nothing above is checked by us. What we check is on the safety report.

FabTally Decode: common questions

Is FabTally Decode MCP server safe?
Yes, by our scan: it is graded A (87/100). Read the FabTally Decode safety report
How do I install FabTally Decode?
It runs remotely at decode.fabtally.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does FabTally Decode need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is FabTally Decode maintained?
The last commit was 95 days ago (2026-08-01). The latest release is v1.0.0.
Is FabTally Decode up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does FabTally Decode compare with other MCP servers?
safety score 87/100 (higher than 73% of 48,255 servers); tools 4 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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