"Remote MCP servers without authentication" matching MCP servers:

Pay-per-call x402 APIs for AI agents: DeFi token safety (honeypot/tax simulation, A-F grade), EVM chain data, web access (markdown/screenshot/PDF), speech-to-text. USDC on Base, no account, no API key

A Model Context Protocol (MCP) server that provides tools and resources for AI agents to interact with the Algorand blockchain.

Provides a pre-signature payment-risk verdict (GO/HOLD/STOP) for x402 payments based on counterparty reputation, price anomaly, and OFAC sanctions.

Enables AI clients to remotely access real-time global intelligence, including currency conversion, cryptocurrency valuations, live weather telemetry, and city living-cost indicators, via MCP over SSE/HTTP.

Enables AI agents to provision, manage, and renew cloud servers with USDC payments via x402, requiring no human signup.

Hashlock Markets — sealed-bid intent-based crypto trading via MCP for AI agents. Atomic cross-chain settlement (Ethereum, Bitcoin, Sui) using HTLC. Six MCP tools for RFQ price discovery without information leakage and HTLC settlement without escrow or bridges. Canonical npm: @hashlock-tech/mcp.

Enables cross-chain swap queries and unsigned transaction building for Mayan Finance, supporting Solana and seven EVM chains via MCP tools, without holding private keys or signing transactions.

Free stock, ETF & crypto analysis for AI agents: 10-point score, descriptive verdict and all key metrics for any ticker. Remote MCP server (Streamable HTTP, no auth, nothing to install) at https://www.stoxlyonline.com/api/mcp, plus a stdio server (server.js) for platforms that run MCP servers as a local process. Rate limit: 30 tool calls per IP per hour. Docs: https://www.stoxlyonline.com/mcp

Read-only Hyperliquid and cross-exchange market research for AI agents, providing structured tools for live market data without requiring authentication.

Enables AI agents to answer Cryptbrew product questions and check live API health without merchant authentication. Exposes tools for pricing, FAQs, invoice flow, and health probes over stdio or streamable HTTP.

A Model Context Protocol server that enables Claude to interact with and analyze your Lighthouse.one crypto portfolio data through secure authentication.

An MCP server that exposes the Kraken cryptocurrency exchange Spot REST API over HTTP with bearer token authentication, enabling account management, trading, and market data queries through natural language.

Enables existing MCP clients to access paid MCP servers by signing x402 payments locally and proxying tool calls, with automatic line management, retries, and spend limits.

Serves a daily board of cryptocurrency YouTube commentary—coin calls, stances, and dated catalysts—through MCP tools like latest_board and search, with optional paid testnet endpoints for coin details, stance history, and catalyst queries.

MCP server for opcode gasless trading API, enabling agents to perform trades, logins, and account operations through a sign-then-submit flow without holding private keys.

A monorepo of MCP servers for Manifest Network and Cosmos SDK chains, enabling natural language interaction with on-chain queries, transactions, lease operations, and provider management.

Trade across 22+ exchanges and brokers from any MCP-capable AI agent. Autoview's MCP server is a hosted, remote endpoint, no install, no local server to run.

Proxies an existing MCP server to add an x402 paywall, charging AI agents per tool call without modifying the upstream server.

Enables AI assistants to search supported coins, get live no-KYC crypto swap estimates and pair information, and track swap order status without an API key.

This MCP server enables agents to fetch and reason about ERC-20 token metadata, balances, and allowances across multiple chains without hardcoding addresses or ABIs.