"A sandbox environment to run Python code and install dependencies" matching MCP servers:

Provides comprehensive access to Ethereum blockchain data through the Etherscan API, including account, block, contract, transaction, token, gas, statistics, logs, and RPC proxy tools.

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

Gives Claude access to Alchemy blockchain APIs by loading all API specs at startup and providing two tools: search and execute. Enables querying NFTs, token balances, transactions, and more via natural language.

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

Provides programmatic access to the Regen Network blockchain, allowing AI agents to interact with ecological credit markets and track carbon or biodiversity assets. It includes over 45 tools for querying blockchain modules, analyzing marketplace dynamics, and performing portfolio impact assessments.

An MCP server enabling AI agents to browse, claim, submit, and manage paid tasks on the SYNAI Relay agent-to-agent task protocol, with on-chain USDC settlement via x402.

Provides tools for querying onchain data across 12+ blockchain networks, including token balances, transaction analysis, and smart contract security auditing. It enables users to interact with multiple EVM-compatible chains and perform deep contract evaluations through natural language interfaces.

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

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.

Combines Midnight Network blockchain development tools with Next.js DevTools for building decentralized applications, supporting contract development, wallet management, and Next.js diagnostics.

Python SDK for x402mail - send and receive email with USDC micropayments

Run a Shopstr / NOSTR marketplace storefront from an AI agent — create and update stalls and products in both the NIP-15 dialect and the Shopstr-modern NIP-99 dialect, including the cache POST that makes Shopstr cards actually render.

An MCP server for Klever blockchain smart contract development, providing contextual knowledge including code patterns, best practices, and runtime behavior.

Market-timing bottom/top signals for ten markets — crypto, US/Korea/China/Hong Kong stocks, commodities, FX, inflation and Seoul/Dubai property — returning a verdict and a -100..+100 score per symbol plus market-wide bottom/top scans. Ships a stdio proxy to the ten remote Streamable HTTP endpoints; the free pitch tool introduces each market's catalog.

MCP server that gives AI assistants access to Midnight blockchain—search contracts, analyze code, and explore documentation.

MCP server for Bags on Solana. Reads token analytics, creator-fee data and trade quotes; executes swaps and fee claims only behind a token gate, a hard SOL spend cap, and a single-use confirmation token bound to the exact arguments. The first call to a write tool signs nothing — it returns a preview. 14 tools, 337 tests at 100% coverage enforced in CI, mainnet-only writes, npm provenance.

Enables AI agents to fetch and independently verify on-chain data such as account balances and contract code hashes using Merkle proofs and ECDSA signatures, with x402 payment integration.

Enables AI assistants to help developers integrate gasless transactions on the Aptos blockchain by providing access to documentation, code snippets, and transaction cost estimation. It facilitates interaction with the SmoothSend SDK and API through MCP-compatible tools like Cursor and Claude.

Enables agents to read and write technocore.chat messages with a did:key identity, including end-to-end encrypted rooms, via 14 tools over stdio.

Provides Ethereum blockchain data tools via Etherscan's API, enabling users to check balances, view transactions, track token transfers, fetch contract ABIs and code, monitor gas prices, and resolve ENS names.