Tollkit Crypto

ultrastarz/x402-extract-mcp

Gives Claude a single tool to extract structured schema.org/Product JSON from any URL. Each call costs $0.01 USDC paid via x402 from a Base Sepolia wallet you configure with a private key. The server forwards your payment and URL to a hosted endpoint running Playwright and Claude Haiku, which renders the page and returns name, price, currency, availability, variants, and images. Works well on Bandcamp, Shopify, and simpler sites. Fails on Amazon, Walmart, and other aggressive anti-bot targets. You fund a throwaway wallet with testnet ETH for gas and testnet USDC for calls, then point Claude Desktop at it via npx. No API keys or subscriptions, just per-call tolls.

tools: 13
transport: HTTP
last updated: Oct 21, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://api.tollkit.dev/mcp/crypto --name x402-extract

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

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

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 13 tools

Verified live against the running server on Nov 6, 2026.

check_my_balanceFree. 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...3 params

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...

Parameters* required

address*string

Your wallet address (0x...). The address you pay from.

low_belownumber

USDC amount you consider low. Default 1.

networkstring

Default base. Use sepolia for test money.one of base · sepolia

wallet_balanceCheck 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 call...4 params

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 call...

Parameters* required

address*string

0x address on Base/Ethereum, or base58 address on Solana.

chainstring

"base" (default), "ethereum" or "solana".one of base · ethereum · solana

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

tokensarray

Extra ERC-20 contracts (SPL mints on Solana) to include.

token_infoLook 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 x...3 params

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 x...

Parameters* required

chainstring

"base" (default), "ethereum" or "solana".one of base · ethereum · solana

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

token*string

ERC-20 contract, or SPL mint on Solana.

transaction_lookupLook 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...3 params

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...

Parameters* required

chainstring

"base" (default), "ethereum" or "solana".one of base · ethereum · solana

hash*string

0x transaction hash, or base58 signature on Solana.

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

token_priceGet 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 whe...3 params

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 whe...

Parameters* required

chainstring

"base" (default), "ethereum" or "solana".one of base · ethereum · solana

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

token*string

ERC-20 contract or SPL mint to price ("SOL" works on Solana).

token_checkCheck 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, pau...3 params

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, pau...

Parameters* required

chainstring

"base" (default), "ethereum" or "solana".one of base · ethereum · solana

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

token*string

ERC-20 contract or SPL mint to check.

wallet_portfolioValue 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. C...4 params

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. C...

Parameters* required

address*string

0x address on Base/Ethereum, or base58 address on Solana.

chainstring

"base" (default), "ethereum" or "solana".one of base · ethereum · solana

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

tokensarray

Extra token contracts or SPL mints to include.

pretrade_checkBefore 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 advi...5 params

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 advi...

Parameters* required

amount_usdnumber

Planned trade size in USD, to compare with pool depth.

chainstring

"base" (default), "ethereum" or "solana".one of base · ethereum · solana

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

token*string

Token to check: ERC-20 contract or SPL mint ("SOL" works on Solana).

walletstring

Your wallet address, to see how much of the token it holds.

crypto_newsGet 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...4 params

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...

Parameters* required

freshnessstring

How recent: "hour", "day" (default) or "week".one of hour · day · week

numinteger

How many articles (1-10, default 8).

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

querystring

Coin or topic, e.g. "solana" or "bitcoin ETF". Leave out for the whole crypto market.

perps_marketHyperliquid 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...5 params

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...

Parameters* required

coinsarray

Hyperliquid coin names, e.g. ["BTC", "ETH", "kPEPE"]. Leave out for the top markets.

funding_hoursinteger

Add hourly funding history for this many hours; needs exactly one coin.

limitinteger

How many top markets (default 10).

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

sortstring

How to rank the top markets when coins is left out (default volume).one of volume · open_interest · funding_high · funding_low · change_24h

crypto_market_pulseGet 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 Hyper...1 params

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 Hyper...

Parameters* required

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

price_historyGet 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...4 params

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...

Parameters* required

asset*string

Symbol, e.g. "ETH", "BTC", "SOL" or "LINK".

daysinteger

How far back, in days (default 7).

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

pointsinteger

How many prices to return (default 24).

x_pulseThe 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 prom...3 params

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 prom...

Parameters* required

coinstring

Coin symbol or name, e.g. "SOL" or "BONK". Give this or query.

paymentstring

Base64 x402 payment payload. Omit it to receive a quote; sign that and call again.

querystring

A crypto topic, e.g. "bitcoin ETF". Give this or coin.

Readme

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" }
  }
}

View the full README on GitHub

Details

Repository: github.com/ultrastarz/x402-extract-mcp
Website: tollkit.dev/tools#chain
Categories: Search & Web Crawling, Finance & Commerce
Transport: HTTP
Registry: MCP registry, active
Tools verified: Nov 6, 2026

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Tollkit Crypto

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