Bloomfilter

Name: Bloomfilter
Author: BloomFilter-Labs

by BloomFilter-Labsversion 0.1.1i★ –iRuns on your computer

Registry nameio.github.Eronmmer/bloomfilter

Install

Overview

Description from the maker (original English)

Service that lets AI Agents search, register, and configure domains

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi0 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Search & AI memory
You need to fill in: BLOOMFILTER_PRIVATE_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 0 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: BLOOMFILTER_PRIVATE_KEY, BLOOMFILTER_API_URL, BLOOMFILTER_NETWORK

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "bloomfilter": {
      "command": "npx",
      "args": [
        "-y",
        "@bloomfilter/mcp-server"
      ],
      "env": {
        "BLOOMFILTER_PRIVATE_KEY": "your-value",
        "BLOOMFILTER_API_URL": "your-value",
        "BLOOMFILTER_NETWORK": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add bloomfilter --env BLOOMFILTER_PRIVATE_KEY=your-value --env BLOOMFILTER_API_URL=your-value --env BLOOMFILTER_NETWORK=your-value -- npx -y @bloomfilter/mcp-server

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "bloomfilter": {
      "command": "npx",
      "args": [
        "-y",
        "@bloomfilter/mcp-server"
      ],
      "env": {
        "BLOOMFILTER_PRIVATE_KEY": "your-value",
        "BLOOMFILTER_API_URL": "your-value",
        "BLOOMFILTER_NETWORK": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "bloomfilter": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@bloomfilter/mcp-server"
      ],
      "env": {
        "BLOOMFILTER_PRIVATE_KEY": "your-value",
        "BLOOMFILTER_API_URL": "your-value",
        "BLOOMFILTER_NETWORK": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

BLOOMFILTER_PRIVATE_KEY secret required env
Hex-encoded private key for a wallet funded with USDC on Base to pay for domains and DNS operations
BLOOMFILTER_API_URL env
Bloomfilter API base URL (defaults to https://api.bloomfilter.xyz)
BLOOMFILTER_NETWORK env
CAIP-2 network identifier (defaults to eip155:8453 / Base mainnet)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

! Caution
Maker matches the repo
The publisher (Eronmmer) is not the repo owner (BloomFilter-Labs); someone else may have listed it
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Search & AI memoryi

More stars than 0% of the other 7251 servers in this category
Published to the registry more recently than 3% of the other 7251 servers in this category
Basic checks equal to or better than 33% of the other 7251 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Bloomfilter safe?

It passed 0 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: BLOOMFILTER_PRIVATE_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.1) reached the registry 9 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Context7

by upstash

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

Computer or cloud★ 64,224MITUpdated today

Install

Codebase Memory

by DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Runs on your computer★ 48,148MITUpdated 20 days ago

Install

Exa

by exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Runs in the cloud★ 5,213MITUpdated last month

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

@bloomfilter/mcp-server

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.

Quick Start

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.

Configuration

Add this JSON to your MCP client's config file:

"mcpServers": { "bloomfilter": { "command": "npx", "args": ["-y", "@bloomfilter/mcp-server"], "env": { "BLOOMFILTER_PRIVATE_KEY": "0x..." } } } }

Config file location by client

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.

Environment variables

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.

Tools

The server exposes 10 tools:

Free (no wallet needed)

`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.

Authenticated (wallet required)

`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.

DNS Management (wallet required, $0.10 USDC per mutation)

`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.

How Payments Work

Bloomfilter uses the x402 protocol, an HTTP-native payment standard. When a tool triggers a paid API call, the server handles payment negotiation automatically:

The API responds with HTTP 402 and a payment requirement
The MCP server signs a USDC payment with your wallet
The API verifies the payment and completes the request

All payments are in USDC on Base (an Ethereum L2). You need USDC in the wallet corresponding to your private key.

Authentication

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.

Documentation

Full API reference and guides at docs.bloomfilter.xyz.

Building from Source

git clone https://github.com/BloomFilter-Labs/mcp-server-bloomfilter.git

cd mcp-server-bloomfilter npm install npm run build

Requires Node.js 20+.

License

MIT

Bloomfilter

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Search & AI memoryi

Common questions

Alternatives

Context7

Codebase Memory

Exa

README from the maker

@bloomfilter/mcp-server

Quick Start

Configuration

Config file location by client

Environment variables

Tools

Free (no wallet needed)

Authenticated (wallet required)

DNS Management (wallet required, $0.10 USDC per mutation)

How Payments Work

Authentication

Documentation

Building from Source

License