🐴 Gulltoppr
Resolve any EVM contract ABI (even unverified, via decompilation), read, simulate, prepare txs.
Connect it
Settings → Connectors → Add custom connector
URL: https://mcp.gulltoppr.dev/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://mcp.gulltoppr.dev/mcp{
"mcpServers": {
"gulltoppr": {
"url": "https://mcp.gulltoppr.dev/mcp"
}
}
}claude mcp add --transport http gulltoppr https://mcp.gulltoppr.dev/mcp{
"servers": {
"gulltoppr": {
"type": "http",
"url": "https://mcp.gulltoppr.dev/mcp"
}
}
}12 tools, verified live
list_chainsread-onlyList viem-backed chain aliases and ids. Use filters to find testnets, default-RPC chains, or a named chain before resolving contracts.
runtime_metricsread-onlyRead process-local resolver/rung/RPC counters for smoke checks and reliability dashboards.
lookup_selectorread-onlyLookup gulltoppr-proven signatures for a 4-byte function/error selector or 32-byte event topic0. Prefer these over public 4byte guesses.
registry_statsread-onlyRead selector commons counts by proof grade and bytecode-match index size.
export_registryread-onlyReturn the CC0 selector commons as NDJSON. This can be large; prefer lookup_selector for normal agent workflows.
resolve_abiread-onlyResolve a contract's interface from chain + address via a fallback ladder (Etherscan â Sourcify â proxy â heimdall decompile â 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 â treat it with care and confirm intent before writing.
read_contractread-onlyCall a view/pure function and get the decoded result. No wallet, no cost. Rejects state-mutating functions.
encode_callread-onlyEncode a function call to calldata (0xâ¦) without sending anything.
simulateread-onlySimulate 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.
prepare_txPrepare 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
decode_txread-onlyDecode 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.
resolve_nameread-onlyResolve an ENS/Basename to an address, or an address to its primary ENS/Basename. Pass chain=base for Basenames.
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