"Free and open-source GPS without an API" matching MCP servers:

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.

Non-custodial crypto swaps for AI agents: Solana (Jupiter) + 7 EVM chains (KyberSwap), 1288+ assets, cross-chain routing, priority-fee oracle, Hyperliquid perps. Returns unsigned transactions — your wallet signs, no API key, no KYC. Hosted at https://swaptitan.net/mcp

A server that allows AI agents to interact with the Tally API to access DAO governance data, proposals, and metadata using Model Context Protocol (MCP), built with TypeScript and GraphQL.

MCP server for cross-chain bridging, enabling AI agents to find routes, estimate costs, check risks, execute transfers, and track status across blockchains.

An MCP server that enables LLMs to query DAOs, proposals, and voting data from Tally's blockchain governance API across multiple networks.

Enables AI assistants to query blockchain chain data, including chain details, RPC endpoints, and chain relationships, through a Model Context Protocol server.

A Model Context Protocol server implementation that provides endpoints for wallet-based authentication, cluster management, and name registration services.

An MCP server that enables querying and managing relationships between websites and mobile apps through Google's Digital Asset Links API, auto-generated using AG2's MCP builder.

MCP server for defining, validating, deploying, and operating Shodai machine-readable agreements with EIP-712 permit preparation, signed participant inputs, state reads, and input history.

An MCP server that fetches on-chain blockchain data via the Ankr API, allowing LLMs to retrieve token balances for wallet addresses on specific networks.

Provides access to NFTGo's Developer API for retrieving NFT collection details, asset information, market data, wallet information, and search capabilities on the Ethereum blockchain.

Exposes fourteen read-only tools over the HEY Research public API, letting assistants look up Robinhood Chain projects, builders, shipped work, relationships and market context, with each answer tagged FACT, DERIVED or UNKNOWN and unmeasured fields omitted rather than zeroed. Runs over stdio or hosted Streamable HTTP, and gives no trade instructions.

Allows LLM agents and MCP clients to analyze blockchain data including wallet balances, token information, and transaction history across EVM and Solana chains through the Dune API.

Enables interaction with blockchain networks through the Rosetta API standard for Internet Computer Protocol (ICP). Supports operations like account balance queries, transaction construction and submission, block retrieval, and network status checks.

MCP server for Chainlink Runtime Environment, enabling build, simulate, deploy, and manage CRE workflows from any MCP client.

Provides AI agents with 71 tools to query Etherscan's blockchain analytics via the Etherscan API, with no authentication required.

An x402-native API that compares real-time gas prices across up to 9 EVM chains and recommends the cheapest one, enabling users to optimize transaction costs for trading agents and DeFi bots.

Enables AI agents to access 48 real-time crypto data tools including prices, DeFi, meme tokens, gas, sentiment, Solana, and agent commerce, with post-paid billing via Solana USDC.

MCP server for Pi Network that enables AI agents to query Pi chain data (balances, transactions) and verify user tokens, with optional payment sending that is off by default.

Provides MCP tools to query Etherscan for Ethereum blockchain data—ETH balances, ERC-20 tokens, transactions, contract ABIs, and gas prices—without requiring an API key.