Service that lets AI Agents search, register, and configure domains
MCP server for Bloomfilter, search & register domain names and manage DNS records from AI agents.
Bloomfilter is a domain registration and configuration API that uses x402 for payments. Point your AI agent at the Bloomfilter API, give it a wallet with some USDC, and it can autonomously search, register, and configure domains.
No login, no credit card, no dashboard. Just HTTP requests and a crypto wallet.
This MCP server wraps the Bloomfilter API so that any MCP-compatible client (Claude Desktop, Cursor, Windsurf, custom agents, etc.) can use it as a tool provider.
BLOOMFILTER_PRIVATE_KEY=0x... npx @bloomfilter/mcp-server
The server communicates over stdio (JSON-RPC). It's meant to be launched by an MCP client, not run standalone.
Add this JSON to your MCP client's config file:
{
"mcpServers": {
"bloomfilter": {
"command": "npx",
"args": ["-y", "@bloomfilter/mcp-server"],
"env": {
"BLOOMFILTER_PRIVATE_KEY": "0x..."
}
}
}
}
| Client | Config file |
|---|---|
| Claude Desktop | claude_desktop_config.json |
| Claude Code | ~/.claude/settings.json |
| Cursor | .cursor/mcp.json |
| Windsurf | ~/.codeium/windsurf/mcp_config.json |
| VS Code + Copilot | .vscode/mcp.json |
| Cline | Via Cline MCP settings UI |
| JetBrains IDEs | Settings > Tools > AI Assistant > MCP |
Any MCP-compatible client that supports stdio servers will work.
| Variable | Required | Default | Description |
|---|---|---|---|
BLOOMFILTER_PRIVATE_KEY | For paid operations | - | EVM private key (hex). Used for x402 payments and wallet-based auth. |
BLOOMFILTER_API_URL | No | https://api.bloomfilter.xyz | API base URL. |
Without a private key, only search_domains and get_pricing work. Everything else requires a wallet.
The server exposes 10 tools:
search_domains: Check if a domain is available and get pricing. Searches across multiple TLDs at once.get_pricing: Get registration, renewal, and transfer pricing for one or all supported TLDs.get_domain_info: Get details about a registered domain: status, expiry, nameservers, lock state.register_domain: Register a new domain. Pays with USDC via x402 automatically. Handles async provisioning.renew_domain: Extend a domain registration. Same x402 payment flow.get_account: View wallet address, domain count, total spent.list_dns_records: List all DNS records for a domain.add_dns_record: Add a DNS record (A, AAAA, CNAME, MX, TXT, NS, SRV, CAA, FORWARD).update_dns_record: Update an existing DNS record by ID.delete_dns_record: Delete a DNS record by ID.Bloomfilter uses the x402 protocol, an HTTP-native payment standard. When a tool triggers a paid API call, the server handles payment negotiation automatically:
All payments are in USDC on Base (an Ethereum L2). You need USDC in the wallet corresponding to your private key.
The server authenticates with the Bloomfilter API using SIWE (Sign-In With Ethereum). This happens automatically on the first authenticated tool call. No setup needed beyond providing your private key.
Full API reference and guides at docs.bloomfilter.xyz.
git clone https://github.com/BloomFilter-Labs/mcp-server-bloomfilter.git
cd mcp-server-bloomfilter
npm install
npm run build
Requires Node.js 20+.
MIT
Source-derived launch command. Check the maintainer’s required arguments and credentials before running:
npx -y @bloomfilter/mcp-serverMerge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.
{
"mcpServers": {
"io-github-eronmmer-bloomfilter": {
"command": "npx",
"args": [
"-y",
"@bloomfilter/mcp-server"
]
}
}
}Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.
Claude Desktop setup reference@bloomfilter/mcp-servernpmio.github.Eronmmer/bloomfilter works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.
~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.~/.cursor/mcp.jsonRestart Cursor for changes to take effect..vscode/mcp.jsonReload VS Code window for changes to take effect.~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect..mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.