"How to play a sound notification when a task is completed" matching MCP servers:

Cross-chain cryptocurrency swaps via Chainflip. Get quotes, execute swaps, and track progress. No API key required to get started.

Generates MCP servers from smart contract ABIs, enabling Claude to interact with any Ethereum contract via natural language commands.

Teaches AI coding agents how to reason correctly about MetaMask Embedded Wallets / Web3Auth architecture, SDK choice, key derivation, auth flows, and common integration pitfalls.

Enables AI agents to play the CPU Game on EVM, including world exploration, building, crafting, and trading via natural language.

Provides pay-per-use tools for AI agents like web screenshots and crypto intelligence using automatic USDC micropayments on the Base network. It simplifies access to premium APIs by handling blockchain transactions automatically when a payment is required.

RandomWeb3MCP is a random element generation service based on EVM block hash. The service provides various random element generation tools that can be used in games, finance, testing, and other fields.

Enables interaction with Opinion.trade decentralized prediction markets on BNB Chain, supporting market data queries in read-only mode and full trading capabilities (placing orders, managing positions, viewing balances) with EIP712 signing when configured with a private key.

A toolkit that integrates with the Sui blockchain, allowing Claude to request test tokens through a testnet faucet tool when users provide their wallet addresses.

Lets a merchant's AI agent read and act on a single non-custodial recurring payments project on Solana, by calling the project's HTTP API through tools and passing a project-bound access token. Every request is stateless, and tool output is treated as data, never as instructions.

Enables agents to read a pseudonymous message network's public feed, claims ledger, marketplace listings, and signed Merkle ledger chain, and — with a paid or proof-of-work pass — to post, claim, and trade capabilities with other agents. Every entry is chained into signed Merkle roots so clients can verify the record themselves with a standalone verifier instead of trusting the server.

Enables AI agents to look up token risk verdicts and ERC20 facts, wallet snapshots, gas prices, transaction summaries, and Basename resolution on the Base network. Each call is paid in USDC over x402 from a dedicated wallet the user controls, with per-call price caps and a session budget.

MCP server that integrates the Taskmarket onchain marketplace into any MCP client, allowing agents to browse open work, fetch task details, inspect submissions, and create or submit tasks with explicit approval and a configured spending cap.

Enables Claude to analyse a Nostr relay read-only: reachability, NIP-11 details, recent and counted events, activity reports, author lookups, spam triage and event engagement, with third-party text fenced as untrusted. When explicitly enabled, it also lets Claude draft notes and reactions and publish them through a NIP-46 remote signer, with the user's key staying in the signer and every publication requiring human confirmation.

Enables AI agents to autonomously play an on-chain 1v1 combat arena on Robinhood Chain, including registering fighters, wagering ETH, scouting opponents, and submitting coaching strategies.

A minimal demo of the x402 payment protocol protecting an MCP tool endpoint, showing how to charge for MCP tools using real 402 rejections and testnet payments.

DataFood is a remote MCP server that gives AI agents one-call access to 16 cross-niche data sources — crypto, DeFi, security, weather, news, finance, web3 — through a single Streamable-HTTP endpoint.

Exposes typed crypto-security tools — token risk scoring, wallet forensics, deployer reputation, sentiment, and report generation — to MCP-capable agents over streamable HTTP or stdio. Gates premium calls behind per-request x402 crypto micropayments, delegating verification and settlement to a self-hosted facilitator and failing closed when payment cannot be confirmed.

mcp server that allows to do actual actions related to solana first version adds knowledge about RPC methods and how to call them

AI Agent Hub is a pay-per-call API platform for AI agents Every call is billed automatically in USDC using the x402 protocol - there is no API key, no account, and no signup. Agents get instant access to data queries, file storage, and ad impressions, paying only for what they actually use. The same tools are also exposed natively over MCP, so any MCP-capable agent can discover and call them

Enables users to verify whether an ERC-8004-registered agent is currently reachable by resolving its on-chain registration and performing a live MCP handshake, returning verdicts such as REGISTERED_UNREACHABLE or AGENT_NOT_FOUND.