check-availability
Check if an ENS name is available for registration
LABSCO SUMMARY
ENS questions get settled in the conversation instead of on a block explorer.
Resolution runs both directions, and get-all-records collapses what would otherwise be several explorer tabs into one answer. Buying is not part of it: get-registration-price quotes a duration and stops there. The chain connection is yours through PROVIDER_URL, and no signing key is asked for.
What it is
A read-only ENS client that reaches Ethereum through a provider URL you supply.
What you get
- Name-to-address resolution and the reverse lookup from an address back to its ENS name.
- A text record by key, or every record held against a name in one call.
- Subdomains of a name, and the history behind the name itself.
- An availability check, and the registration price for a chosen duration.
Requirements
An Ethereum provider URL, supplied as PROVIDER_URL.
Setup effort
One command — npx -y mcp-server-ens
USE CASES
01
Checking whether a name is free and what taking it would cost
Availability and price are two separate questions, and the price depends on how long you register for.
02
Putting a name to an address that turned up in a transaction
A raw address says nothing. The reverse lookup gives you the name, and one further call gives you everything published under it.
03
Reading the value a name publishes under a specific record key
When you know the key you want, fetching that one text record is cheaper than reading the whole profile.
04
Tracing what has happened to a name and what sits under it
Before trusting a name, its history and its subdomain tree are the two things that tell you how it has been used.
8 tools
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
get-all-records
Get all available information for an ENS name
get-name-history
Get the history of an ENS name
get-registration-price
Get the price to register an ENS name
get-subdomains
Get subdomains for an ENS name
get-text-record
Get a text record for an ENS name
resolve-name
Resolve an ENS name to an Ethereum address
reverse-lookup
Get the ENS name for an Ethereum address
BEFORE YOU INSTALL
What to know first
Tools you get
8 tools when we connected.
Requires
- npx on PATH
- Node.js 16 or higher
CONTEXT COST
Light Standing cost
Rated by the size of the 8 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
Connect your client
Add the block to your client, or run the command directly.
Server setup
Configuration file
JSON
{
"mcpServers": {
"ens": {
"command": "npx",
"args": [
"-y",
"mcp-server-ens"
],
"env": {
"PROVIDER_URL": "<YOUR_PROVIDER_URL>,<YOUR_BACKUP_PROVIDER_URL>"
}
}
}
}PROVIDER_URL is optional: <YOUR_PROVIDER_URL> and <YOUR_BACKUP_PROVIDER_URL> are your own Ethereum RPC URLs, comma-separated. Without the env entry the server uses the default public providers (eth.drpc.org, eth.llamarpc.com, ethereum.publicnode.com, rpc.ankr.com/eth).
npx
TERMINAL
npx -y mcp-server-ens
