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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

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

[mcp_servers.onchain-decode]
url = "https://decode.fabtally.com/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "onchain-decode": {
      "type": "remote",
      "url": "https://decode.fabtally.com/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "onchain-decode": {
      "type": "http",
      "url": "https://decode.fabtally.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=onchain-decode&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZGVjb2RlLmZhYnRhbGx5LmNvbS9tY3AifQ%3D%3D"
}

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

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

extensions:
  "onchain-decode":
    enabled: true
    name: "onchain-decode"
    type: streamable_http
    uri: "https://decode.fabtally.com/mcp"
    timeout: 300

Quality 79 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: decode_log (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); selector_lookup (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); abi_fetch (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
pass
tools.token_costabout 1,283 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

4 tools, about 1,283 tokens to load them all · tool set 80d047cebcf3 · checked 2026-10-20 10:35 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 94 / 100

provenance90

liveness100

freshness85

hygiene100

+repository +namespace-matches-repo +website +reachable +uptime-100% ~updated-80d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://decode.fabtally.com/mcp` streamable-http	none	yes	100%	386 ms	2025-11-25	2026-10-20

Tools (4)

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

Schemas: list_tools.

Similar MCP servers

More from io.github.zvmzaretsky

Official server.json

{
  "name": "io.github.zvmzaretsky/onchain-decode",
  "title": "FabTally Decode",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://decode.fabtally.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.0",
  "repository": {
    "url": "https://github.com/zvmzaretsky/onchain-decode-mcp",
    "source": "github"
  },
  "websiteUrl": "https://decode.fabtally.com",
  "description": "Decode EVM bytes to JSON: event-log decoder, calldata explainer, selector lookup, ABI fetch."
}