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PopNx MCPMCP servers for people who use AI · explained in plain words

Tollkit

by UltraStarzversion 0.9.1i★ –iRuns in the cloud
Registry nameio.github.UltraStarz/x402-extract

Install

Overview

Description from the maker (original English)

Web search, pages and PDFs, crypto market data, SEC filings and weather for agents. USDC per call.

PopNx MCP’s three pillars

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

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 in the cloud
  • Transport: Streamable HTTP
  • Category: Accounting, finance & tax

Install

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

Before you install

You need

Which app do you use?

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

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://api.tollkit.dev/mcp

Run this in your terminal

claude mcp add --transport http x402-extract https://api.tollkit.dev/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "x402-extract": {
      "url": "https://api.tollkit.dev/mcp"
    }
  }
}

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": {
    "x402-extract": {
      "type": "http",
      "url": "https://api.tollkit.dev/mcp"
    }
  }
}

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.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://api.tollkit.dev/mcp

Menu names can differ slightly by plan and over time.

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

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

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

  • get_product_details

    Find out what a product is and what it costs, from its page URL. USE THIS WHEN you have the URL of ONE specific product — a store listing, a marketplace item, a manufacturer's page — and you need its fields rather than its prose. Typical jobs: comparing the same item across sever

  • try_it_free

    Free. Run a real extraction against one fixed sample product page and return the result. USE THIS to decide whether the paid tools are worth paying for. It returns the identical shape get_product_details returns, produced by the identical code — not a hand-written example — so wh

  • compare_products

    Price the same product at several stores — up to 5 URLs in ONE call and ONE payment. USE THIS WHENEVER YOU HAVE MORE THAN ONE URL. Comparing an item across stores, checking a short list, or refreshing a handful of tracked prices. It returns full details for each URL so YOU can co

  • attest_page

    Prove what a web page said, at a time, in a way someone who distrusts you can check. Renders the page and returns a signed, timestamped record of it: the text and its SHA-256, the HTTP status, the response headers, the serving IP, and the TLS certificate the site presented. Optio

  • verify_attestation

    Free, forever, no account. Hand back an attestation -- yours or one someone else gave you -- and find out whether the signature holds and whether we issued it. Works on attestations this service did not produce: the answer for those is a clear no, which is the point. Holds no dat

  • check_my_balance

    Free. Check how much USDC is left in your own wallet on Base, so you can tell your human before you run out. Returns the balance and whether it's below your threshold. Read-only: it moves nothing. Tollkit never holds anyone's funds or keys. When to use: You pay for tools from a w

  • check_service

    Free. Probes any x402 endpoint WITHOUT paying and reports what it actually charges, to which wallet, on which network, and how that compares with its public Coinbase Bazaar listing (price, recipient, distinct payers in the last 30 days). Returns facts and named signals such as pa

  • find_service

    Free. Searches Coinbase's public x402 discovery index for services that do a task (e.g. 'product price lookup', 'send sms', 'web page screenshot'), then checks each result live without paying. Results are ordered by whether they returned a live price quote, then by distinct payin

  • read_page

    Read any public web page and get its visible text back: the words a person would see, with navigation and boilerplate stripped, plus the title and final URL after redirects. JavaScript pages are rendered in a real browser first. Up to 50,000 characters. Use it to read an article,

  • screenshot_page

    Capture how any public web page looks: a 1280x800 JPEG from a real browser, returned as base64 with its SHA-256, the title and the final URL. Use it to see a page's layout, check that something renders, or hand the image to a vision model. The image is roughly 50-150 KB of base64

  • wallet_balance

    Check a wallet's balances on Base, Ethereum or Solana: native ETH or SOL, USDC (plus USDT on Ethereum and Solana), and any token contracts or SPL mints you list (up to 20), with symbols and decimals applied. Read live from the chain. $0.002 USDC per call over x402. Failed calls c

  • token_info

    Look up a token on Base, Ethereum (ERC-20 contract) or Solana (SPL mint): name, symbol, decimals and total supply, plus mint and freeze authority on Solana, read live from the chain. Use it to confirm what an address actually is before acting on it. $0.002 USDC per call over x402

  • transaction_lookup

    Look up a transaction on Base, Ethereum or Solana: did it succeed, when, who sent it, the fee, and every token movement with symbols and amounts (ERC-20 transfers; on Solana, SOL and token balance changes per owner). Use it to confirm a payment actually landed. $0.002 USDC per ca

  • token_price

    Get a token's current USD price on Base, Ethereum or Solana, read from its deepest on-chain pool (Uniswap v3 against USDC or WETH; on Solana, Orca Whirlpools against USDC or SOL) rather than a price API. Returns the pool used, how much liquidity backs the price, and a flag when t

  • web_search

    Search the web and get Google's top results as clean JSON: title, URL, snippet and date for each, plus the direct answer when Google shows one. Optional filters: freshness (past hour, day, week, month or year), include_domains or exclude_domains (up to 5 sites each), and type "ne

  • search_and_read

    Search the web and read the top pages in one step: returns the top web results plus the full visible text of the top 1-3 pages, each rendered in a real browser. Results that can't be read are skipped for the next one down. Optional filters: freshness (past hour to past year), inc

  • sec_company

    Look up a US public company in SEC EDGAR by ticker or CIK: legal name, exchange, industry, state, fiscal year end, and its latest filings (10-K, 10-Q, 8-K, insider Form 4 and more) with direct links. Filter by form type, e.g. only 10-Ks. $0.002 USDC per call over x402. Failed cal

  • sec_financials

    Get a US public company's financials as filed with the SEC: revenue, operating income, net income, diluted EPS, total assets, liabilities, equity, cash, operating cash flow and shares outstanding — last 4 fiscal years plus the latest quarter, each tied to its filing. $0.004 USDC

  • ip_lookup

    Find where an IP address is: country, region, city, continent and approximate coordinates, for IPv4 or IPv6. City-level accuracy, not a street address. Data: IP Geolocation by DB-IP (db-ip.com), CC BY 4.0. $0.002 USDC per call over x402. Failed calls cost nothing. Call without `p

  • weather_forecast

    Get the weather forecast for any latitude/longitude in the world, or a US street address: the next 7 days in day and night periods (temperature, rain, wind, summary). US locations use the National Weather Service and include any active watches, warnings or advisories; elsewhere t

  • exchange_rate

    Convert between currencies at European Central Bank reference rates (30 currencies), for the latest business day or any day in the last 90. These rates are published free by the ECB at ecb.europa.eu and are for information only, not for transactions. $0.002 USDC per call over x40

  • company_snapshot

    Get a one-call snapshot of a US public company from SEC EDGAR: profile, most recent filings with links, and key financials (revenue, net income, EPS, assets, cash, operating cash flow) for the last two fiscal years and the latest quarter. $0.006 USDC per call over x402. Failed ca

  • token_check

    Check a token before buying, sending or accepting it, on Base, Ethereum or Solana: what it is, its USD price and liquidity, and plain warnings read from the chain (no pool, thin liquidity; on Base and Ethereum the contract's owner and whether it is upgradeable or can mint, pause,

  • page_brief

    Read any web page in a real browser and get a summary of it in one call, with its title and final URL. Says when the page was longer than the part summarized. $0.007 USDC per call over x402. Failed calls cost nothing. Call without `payment` to get a quote. When to use: You need t

  • read_pages

    Read several web pages at once: give up to 5 URLs and get the full visible text of each (up to 20,000 characters a page), rendered in a real browser so JavaScript pages work, with title and final URL. Pages that can't be read are listed with the reason; the rest still come back.

  • company_due_diligence

    Run due diligence on a US public company in one call: profile, revenue/profit growth, margins, leverage and cash ratios computed from SEC filings, key filings with links, and plain-English summaries of its latest 8-K material events. $0.03 USDC per call over x402. Failed calls co

  • wallet_portfolio

    Value a wallet in USD on Base, Ethereum or Solana: each holding (native coin, USDC/USDT and any tokens you list) priced from on-chain pools, the total, and warnings for thin pools or positions bigger than their pool. $0.005 USDC per call over x402. Failed calls cost nothing. Call

  • airport_delays

    Check US airport delays from the FAA's live National Airspace System status: ground stops, ground delay programs, arrival and departure delays (with minutes, trend and reason) and closures. Give an airport code, or none to list every airport with delays right now. $0.003 USDC per

  • geocode_address

    Turn a US street address into latitude and longitude, with the standardized address, ZIP, county and FIPS code, state and census tract, from the US Census Bureau geocoder. US street addresses only (with a house number). $0.002 USDC per call over x402. Failed calls cost nothing. C

  • pdf_to_text

    Read a PDF from a URL as text, page by page, with its title, author and page count. Works on text-layer PDFs up to 25 MB and 300 pages; scanned PDFs without a text layer are refused at no charge. $0.005 USDC per call over x402. Failed calls cost nothing. Call without `payment` to

  • pretrade_check

    Before trading a token on Base, Ethereum or Solana: its USD price and liquidity, plain warnings read from the chain, how big your planned trade is next to the pool (rough price impact), how much your wallet already holds, and recent web results about the token. Facts, not advice.

  • x402_seller_lookup

    Look up any x402 seller by hostname: its rank among all sellers, 30-day calls, estimated revenue and paying wallets, each endpoint's numbers and price, its categories and competitors, and labels where its numbers look unusual. Weekly, from Coinbase's Bazaar catalog. $0.02 USDC pe

  • best_x402_tools

    Find the best paid x402 API for a task. Ranked by paying wallets and repeat buyers (not raw call counts, which are easy to inflate), one endpoint per seller, with price and a caution where a seller's numbers look unusual. Tollkit runs this ranking and sells tools too; its own are

  • x402_market_dataset

    Get the whole x402 market as one dataset: every active seller with rank, 30-day calls, estimated revenue, paying wallets, categories and unusual-number labels, plus category totals. Rebuilt weekly from Coinbase's Bazaar catalog. $0.10 USDC per call over x402. Failed calls cost no

  • crypto_news

    Get recent crypto news for a coin or topic: up to 10 articles from the past hour, day or week with publisher, date, snippet and link, plus a short AI read of the coverage (mood: positive, negative, mixed or neutral; a summary; main themes) written only from those headlines. A rea

  • perps_market

    Hyperliquid perpetuals: mark and oracle price, 24h change, current hourly funding rate (positive means longs pay shorts) and annualized, open interest in coins and USD, 24h volume and max leverage. Name up to 20 coins, or leave coins out to get the top markets sorted by volume, o

  • crypto_market_pulse

    Get the crypto market at a glance in one call: the Crypto Fear & Greed Index (today, yesterday, a week ago), BTC, ETH and SOL with perp price, 24h change, funding and Chainlink reference price, the highest and lowest funding rates, the biggest 24h gainers and losers, and Hyperliq

  • price_history

    Get past USD prices for a crypto asset (ETH, BTC, SOL, LINK and others with a Chainlink feed) over up to 365 days: up to 100 points read from Chainlink's on-chain price feed on Ethereum, each with its time and round, plus first, last, high, low and percent change. $0.002 USDC per

  • x_pulse

    The mood on X (Twitter) about a coin or crypto topic in the last 24 hours: bullish, bearish, mixed or quiet, a score from -1 (very bearish) to 1 (very bullish), how many posts were read, up to three short themes, and links to representative posts. Giveaways, bots and paid promoti

  • get_service_info

    Free. Price, network, and what this service returns. For a sample of the actual output rather than a description of it, call try_it_free instead. When to use: You want this service's prices, network and endpoints in machine-readable form. Free. Use instead: try_it_free to see rea

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 8, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account UltraStarz, which owns the repo

  • … 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

  • ✓ Pass

    Endpoint responds

    Responded in 706 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 40 tool descriptions and found no hidden instructions to the AI

Compared with others in Accounting, finance & taxi

  • More stars than 0% of the other 2933 servers in this category
  • Published to the registry more recently than 64% of the other 2933 servers in this category
  • Basic checks equal to or better than 100% of the other 2933 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 Tollkit safe?

It passed 3 of 3 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?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.9.1) reached the registry 18 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Finance Toolkit, SolidInvoice, Korea Tax Calculator

Alternatives

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

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

Finance Toolkit

500+ transparent financial methods calculated from raw statements, not third-party endpoints.

by JerBoumaWidely used↓ 15.5K/wk★ 5.5KUpdated yesterday

Computer or cloud

SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

by SolidInvoiceGrowing★ 981Updated 9 days ago

Runs in the cloud✓ solidinvoice.co

Korea Tax Calculator

Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.

by UpstageAIGrowing↓ 3.2K/wk★ 97Updated today

Runs on your computer

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.

Tollkit MCP server

Pay-per-call tools for AI agents, as one remote MCP server:

https://api.tollkit.dev/mcp

No account and no API key. Each paid tool costs a fixed amount of USDC, paid per call with x402 on Base or Solana. A call that fails is never charged.

Listed in the official MCP Registry as io.github.UltraStarz/x402-extract.

Connect

Add the URL above as a remote (Streamable HTTP) MCP server in Claude, Cursor or any MCP client. In clients that take a JSON config:

{

"mcpServers": { "tollkit": { "url": "https://api.tollkit.dev/mcp" } } }

Paying: MCP has no 402 status, so a paid tool called without its payment argument returns the price quote as its result. Sign that quote with your x402 wallet and call the tool again with payment set. Six tools are always free: try_it_free (a real sample result), get_service_info, find_service, check_service, check_my_balance and verify_attestation. Fourteen give 3 free calls a day without a payment: read_page, screenshot_page, pdf_to_text, weather_forecast, airport_delays, geocode_address, exchange_rate, ip_lookup, wallet_balance, token_info, transaction_lookup, token_price, token_check and sec_company.

Tools

GroupToolsPrice per call
Web pages & documentsweb search (with date, site and news filters), search + read top pages, read a page or up to 5 at once in a real browser, screenshot, summarize, page brief, PDF to text$0.002 – $0.008
Public dataSEC filings, financials, company snapshot and due diligence; weather anywhere in the world (by point, or US address); FAA airport delays; US address geocoding; exchange rates; IP lookup$0.002 – $0.03
On-chain (Base, Ethereum, Solana)wallet balance and portfolio, token info, token price, token safety check, transaction lookup, pre-trade check$0.001 – $0.01
x402 market databest x402 tools for a task, seller lookup, full market dataset$0.01 – $0.10
Product dataprice, stock, brand, SKU and images from a store page; compare up to 5$0.01 – $0.04
Proofsigned, timestamped record of what a page said$0.05

Live prices: /health · every tool with its URL and body: llms.txt · tollkit.dev/tools

Without MCP

Every tool is also a plain HTTP endpoint: POST the JSON body, get HTTP 402 with the price, pay with any x402 client (for example @x402/fetch), repeat the request. OpenAPI per hostname, e.g. https://data.tollkit.dev/openapi.json.

This repo

server.json is the MCP Registry entry. src/ holds an older stdio client (the x402-extract-mcp npm package) that only wraps product extraction and is no longer maintained; use the remote server above instead.

More

MIT licensed.

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