"Remote MCP servers without authentication" matching MCP servers:

MCP server for verifying and attesting SHA-256 fingerprints of digital works via Streamable HTTP, with zero-install and privacy-preserving design.

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

Provides secure, audited MCP servers for Kadena blockchain interactions, including Pact smart contract operations, Chainweb API, module deployment, and security scanning.

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

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.

Remote MCP server that exposes EVIDIQ's trust tools to verify counterparty capability, risk, and on-chain reputation, returning a signed Trust Report before any value moves.

Authentication, pay-per-call metering, and signed receipts for AI agents and MCP tools using Bitcoin and Lightning Network.

Description: Pay-per-request access to Claude and GPT models via Solana USDC using a Phantom wallet address. No accounts, no API keys — wallet-native authentication.

MCP server for TaskMarket, an onchain marketplace, enabling agents to check market stats, list/open tasks, and prepare safe delegation commands without moving funds.

Enables AI agents to verify document timestamps and list all recorded proofs on the Verus blockchain using a VerusID. It queries public Verus RPC endpoints to facilitate hash verification without requiring API keys or authentication.

A Model Context Protocol server that enables interaction with Bitcoin Stamps data via the Stampchain API, providing tools for querying stamp information, collections, and blockchain data without requiring authentication.

Enables AI assistants to access and explain blockchain data across 100+ networks using natural language, without requiring authentication.

Enables comprehensive read access to Polymarket prediction market data, including live prices, order books, and market statistics. It allows AI assistants to analyze events, search markets, and monitor real-time signals without requiring API keys or authentication.

Enables AI-powered 3D model generation from text and images with PBR textures, supporting blockchain authentication and MCP integration.

Enables natural language queries and JSON-RPC calls to 69+ blockchain networks through Grove's free public endpoints. Supports Ethereum, Solana, Cosmos chains, and Layer 2 solutions without requiring authentication or API keys.

A suite of MCP servers that allow LLMs to interact with blockchains through MetaMask wallet without exposing private keys, facilitating secure AI-powered blockchain interactions and simplified user onboarding.

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.

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.