🐴 Gulltoppr MCP Server

by portdeveloper Your server? Claim it

answering

🐴 Gulltoppr is answering right now. Last checked 6 min ago. It exposes 12 tools. Last commit 1 Aug 2026.

Resolve any EVM contract ABI (even unverified, via decompilation), read, simulate, prepare txs.

Uptime history 91 days of history · worst day 98%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

1011 ms

Response time

average over 24h

Stars

last commit 1 Aug 2026

Nothing serious here today

Today is the operative word: we check 🐴 Gulltoppr every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add gulltoppr --transport http https://mcp.gulltoppr.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.gulltoppr.dev/mcp

~/.codex/config.toml

[mcp_servers.gulltoppr]
url = "https://mcp.gulltoppr.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "gulltoppr": {
      "url": "https://mcp.gulltoppr.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "gulltoppr": {
      "type": "http",
      "url": "https://mcp.gulltoppr.dev/mcp"
    }
  }
}

Available tools 12

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

resolve

resolve_abi

Resolve a contract's interface from chain + address via a fallback ladder (Etherscan → Sourcify → proxy → heimdall decompile → 4byte). Returns a compact capability manifest (read vs write functions, the 'buttons'), proxy chain, token metadata, and PROVENANCE. ALWAYS read `provenance`: a `decompiled` ABI has synthetic function names — treat it with care and confirm intent before writing. Partial, proxy, and bytecode-match results lead with a WARNING before the JSON. The compact manifest/provenance is also returned as structuredContent. Use method_q/method_kind/method_limit for large ABIs. Raw ABI is omitted from MCP output to save tokens; use REST/SDK resolve_abi with include_abi=true if needed.

resolve_name

Resolve an ENS/Basename to an address, or an address to its primary ENS/Basename. Pass chain=base for Basenames.

chains

list_chains

List viem-backed chain aliases and ids. Use filters to find testnets, default-RPC chains, or a named chain before resolving contracts.

contract

read_contract

Call a view/pure function and get the decoded result. No wallet, no cost. Rejects state-mutating functions.

decode

decode_tx

Decode what a transaction did: delegated heimdall decode plus `decoded_call` from the resolved target ABI when available. Prefer `decoded_call` for typed function/arg names, and read its provenance.

encode

encode_call

Encode a function call to calldata (0x…) without sending anything.

export

export_registry

Return the CC0 selector commons as NDJSON. This can be large; prefer lookup_selector for normal agent workflows.

lookup

lookup_selector

Lookup gulltoppr-proven signatures for a 4-byte function/error selector or 32-byte event topic0. Prefer these over public 4byte guesses.

prepare

prepare_tx

Prepare a contract WRITE for the user to sign. Returns an UNSIGNED transaction, its simulation, a human-readable summary, safety metadata, warnings, a configured signing deeplink, and an EIP-1193 wallet request when signing is recommended. IMPORTANT: this tool NEVER signs or broadcasts. Present the summary + simulation + warnings to the user. Only hand them the `deeplink` or `wallet_request` when `safety.signing_recommended` is true. If `safety.risk_level` is high or blocked, make that explicit; blocked means do not send.

registry

registry_stats

Read selector commons counts by proof grade and bytecode-match index size.

runtime

runtime_metrics

Read process-local resolver/rung/RPC counters for smoke checks and reliability dashboards.

simulate

simulate

Simulate a call and return success, gas, decoded return, and best-effort state diff / asset changes / logs. Provide a high-level call (address + function + args) or raw (to + data), never both.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.gulltoppr.dev/mcp	streamable-http	answering	239 ms	6 min ago

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🐴 Gulltoppr — questions

Answers built from our own checks of this server.

What can 🐴 Gulltoppr do?

It exposes 12 tools, read directly from the server on our last check. Among them: decode_tx, encode_call, export_registry, list_chains, lookup_selector, prepare_tx and 6 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is 🐴 Gulltoppr working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 1011 ms. The bar chart above shows every period we have measured.

How do I connect 🐴 Gulltoppr?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does 🐴 Gulltoppr need an API key?

No. 🐴 Gulltoppr completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 12 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is 🐴 Gulltoppr?

It answers our handshake in 1011 ms on average, which is faster than 4% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is 🐴 Gulltoppr open source?

We cannot say either way: written in TypeScript, 0 stars on GitHub and 1 open issue, but we could not determine the licence, and without one the code is not open source by default.