"Free things, offers, and resources" 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.

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

A Node.js service that provides spot trading functionality through the LnExchange API.

Wallet-funded MCP client for six paid Utilia tools: Solana priority fees, transaction diagnosis and simulation, token-risk checks, PDF-to-Markdown, and audio normalization over x402. MIT-licensed and installable from npm.

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

MCP server for Sean-Claude Van Damme's General Store, enabling AI agents to browse and purchase digital goods and services using USDC payments over the x402 protocol.

An outbound arbitrage agent for 402-enabled MCP endpoints that probes, counter-offers, and settles USDC on Base L2, automating margin arbitrage without human intervention.

MCP server that scans EVM chains to identify profitable free-mint NFT collections and wallets farming them, ranking by on-chain secondary PnL. Supports multiple chains via Seaport and offers tools for scanning collections, wallets, and job status.

Enables running a self-hosted MCP server on Cloudflare Workers that offers a free sample tool and a paid tool requiring USDC payment via x402, with payment proof handling, at-least-once delivery, and retry protection.

MCP server that answers questions about the Chia blockchain, including balances, blocks, transactions, offers, fees, and more, using the public coinset.org API and CoinGecko for pricing.

Enables AI agents to manage Bitcoin micropayments, service offers, and escrow contracts through MCP tools, without requiring a Lightning node.

MCP server that provides live crypto portfolio data, token info, gas prices, swap offers, and Bitcoin balance via Zerion and Blockstream APIs.

Provides verified fixes for real developer errors to AI agents via MCP, with free sample fixes and paid per-lookup transactions on Base mainnet. Enables searching fixes, browsing the catalog, retrieving offers and fixes, and submitting new fixes.

A credit bureau for AI agents that provides proof-backed reputation scoring, attestations, and credit reports. It offers 11 MCP tools for verifying interactions, recommending agents, and managing disputes.

Checks live x402 routes across Base, Solana, and Algorand before agents spend. $0.003 USDC settles only for a valid live eligible route; normal typed misses are not settled. Free preview and validate tools. Seller payment is separate; the agent keeps its wallet. Optional signed route-binding receipts support buyer-side checks.

Provides read-only tools to query live Polymarket prediction-market data via the public Gamma API, enabling search, browsing, and detailed market and event information.

Rug pull risk scores and on-chain forensics for memecoins on Solana, Ethereum, Base and Robinhood Chain - launch-bundle detection, funding-origin tracing, deployer history, insider networks and whale flow. 15 read-only tools.

Read-only on-chain query surface for the AgentCivics civil registry on Sui — soulbound AI-agent identities, on-chain memories, reputation, refusal records. Hosted, no install, no keypair. For write tools (register, write_memory, record_refusal), install the npm package @agentcivics/mcp-server locally and supply your own keypair.

Enables agents to search and inspect live service offerings, generate x402 payment snippets, and understand blockchain-only balance policies.

MCP server for RugGuard, enabling AI agents to perform pre-trade rug checks on tokens, with paid tools for token scanning and pre-trade verification, and a free metrics resource.