"Free APIs and services without commercial fees" matching MCP servers:

MCP server for Crypto APIs Blockchain Fees product, providing fee recommendations and gas estimates for UTXO, EVM, and XRP blockchains.

MCP server wrapping the Ribcage Verification & Research Desk API: claim validation with receipts, scoped research, token screening, settlement verification, and editing tools for AI agents.

Model Context Protocol (MCP) server providing real-time institutional Spot Bitcoin (BTC) and Ethereum (ETH) daily net flow metrics for AI agents.

An MCP server that enables fee-free USDC transfers on the Base blockchain network using Coinbase CDP MPC Wallet integration, with support for ENS and BaseName domain resolution.

This MCP wraps Bitrefill public API to allow agents to search for products and shop using cryptocurrencies like Bitcoin, Ethereum, Solana, and many more.

Provides access to Crypto APIs Market Data, enabling listing supported assets, fetching exchange rates, and retrieving asset details.

Real-time crypto, stock, and prediction-market data for agents — prices, indicators, funding rates, DeFi TVL, macro calendar, and an AI momentum score. Configure one Base wallet key and it just works. No signup, no dashboard, no subscription.

Provides Solana priority fee estimates at 6 levels for transactions, with pay-per-call micropayments via x402.

📈 提供股票、加密货币的数据查询和分析功能MCP服务器

MCP server for querying live Bitcoin data from mempool.space, including recommended fees, mempool stats, blocks, transactions, addresses, and price. No API key required.

Real-time non-custodial crypto swap rates, fees, and on-chain routing across 240+ multi-chain pairs.

Provides real-time Bitcoin on-chain data including Bitmap districts, Ordinals inscriptions, Runes, sat rarity, block details, and current fees via the Model Context Protocol, with zero configuration required.

Provides access to DeFi Llama's free API for querying protocol TVL, chain TVL, yields, stablecoins, bridges, DEX volumes, and fees through natural language.

Discover and pay for APIs and MCP tools per call over Bitcoin Lightning (L402): search the bolthub marketplace, preview prices, and pay from your own wallet (LND, NWC, LNbits) with hard budgets, prepaid credit, scoped sub-agent delegation, and verifiable receipts. Non-custodial and works without a wallet for search and free tools.

Enables Claude to access real-time crypto prices, forex rates, and market sentiment data through free public APIs with no keys required.

Enables AI assistants to query read-only Stellar analytics over MCP: network status and fees, asset data with look-alike warnings, SDEX order books, account balances with spendable XLM, and DeFi TVL. It requires no API keys and refuses secret keys, answering from public APIs like Horizon, StellarExpert and DefiLlama.

An MCP server that exposes the satring.com L402 service directory, enabling AI agents to search and query Lightning-paywalled and stablecoin-gated APIs without needing prior knowledge of their URLs.

The MCP gateway that lets any AI agent discover and pay metered APIs on Base or Solana — without the user wiring payments themselves.

Enables AI agents to fetch real-time exchange trading fees, compare rebate-adjusted costs, obtain referral links, calculate trading costs, and identify compliant exchanges for crypto trading.

Enables Claude Desktop, Cursor, and other AI agents to query prediction markets, inspect Level 2 orderbooks, calculate regulatory fees and arbitrage breakevens, estimate implied probabilities, and scan cross-venue spreads.

Read-only MCP server for Sui DeepBook v3 market data: pools, spread, depth, fees, trades, OHLCV. No keys or wallet.

Exposes Agent Church spiritual services as tools for AI agents, including free tools for commune and identity, and paid tools for blessings and salvation with x402 payment integration.

Enables read-only Bitcoin blockchain queries and HD wallet derivation from xpub/seed, including balances, UTXOs, transactions, fees, mempool stats, and PSBT inspection via multiple backends with optional Tor routing.

Enables AI agents to fetch live crypto prices and market data, convert between crypto and fiat, track EVM gas fees, value portfolios, calculate profit/loss, and view historical charts and trending metrics with zero configuration required.

MCP server for ThryxProtocol on Base, enabling AI agents to launch ERC-20 tokens, trade on bonding curves or Uniswap V4 pools, claim fees, and discover tokens through 21 native tools with gasless transactions.

Enables AI assistants to retrieve live BIST and global stock prices, cryptocurrency prices, exchange rates, currency conversion, and inflation data from free public sources without API keys.

Provides live Bitcoin network data (fees, mempool, hashrate) and AI-powered price/fee forecasts via MCP tools, with free access to basic data and pay-per-call for advanced features.

Enables Bitcoin blockchain data retrieval and analysis through free APIs, including transaction, address, market data, and network metrics.

Enables AI agents to discover and call hundreds of x402-priced APIs on Base, including token safety checks, prediction-market odds, web/network/market data, and utilities, with a free cross-bazaar discovery search.

Enables AI assistants to verify crypto wallets, generate proof of funds letters, and provide guidance on purchasing real estate with cryptocurrency, including fees, supported assets, timelines, and the complete transaction flow.