"Diagnosing Issues with My Remote Ubuntu Server Configuration" matching MCP servers:

Enables fetching cryptocurrency token data from DexScreener through payment-protected API calls using x402 middleware, with $0.002 USDC charged per request on Base Mainnet.

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.

Enables interaction with Binance Smart Chain, including wallet management, token transfers, contract execution, PancakeSwap swaps, and four.meme token creation.

Audits Ethereum/Solidity smart contracts using the Cysic Minimax model, providing automated vulnerability detection, gas optimization suggestions, and markdown report generation.

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

A paid MCP server enabling wisdom-market queries over HTTP 402 with Base USDC micropayments. It provides tools for asking the oracle, diagnosing 402s, reviewing MCPs, rewriting bazaar listings, and completing paid tasks, returning structured wisdom envelopes.

Enables autonomous agents to discover and call 35 pay-per-request microservices — pre-execution security guardrails, smart-contract auditing, Solana token and MEV risk oracles, web research, code sandboxes, and frontier AI models — settling each call atomically via Bitcoin Lightning L402, Solana x402, or Base MPP with no API keys, accounts, or subscriptions. It also offers a zero-token demo mode and drop-in integrations for Claude Desktop, Cursor, ElizaOS, LangChain, and CrewAI.

An MCP server that audits ERC-8004 agent registrations, diagnosing issues and providing fix lists.

Enables AI agents to make pay-as-you-go AI inference requests through x402 with automatic Solana USDC payments, no API keys or registration, while enforcing configurable spending limits.

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.

Non-custodial on-chain escrow + AI arbitration for agent-to-agent USDC payments on Base. Seven tools wrap a verified EscrowV1 contract — create, deliver, confirm, dispute, resolve — with read-only introspection if no wallet key is provided.

Enables AI agents to read and bid on a paid message slot on Solana, with enforced spend limits, dry-run proposals, and an append-only audit log for every write.

Agent-Level Transaction Safety Oracle. Before an AI agent signs a blockchain transaction, it returns a SAFE/UNSAFE verdict with a SENTINEL Score (AAA-D) and risk flags. Pay-per-call $0.005 USDC via x402 on Base.

Enables AI agents to discover and pay for x402-gated HTTP APIs, handling 402 Payment Required flows with local signing. Supports EVM and Solana with non-custodial wallet management.

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.

Keyless crypto payments for AI agents. One MCP call turns any wallet address into a non-custodial crypto payment link or tip jar, no API key and no account, with funds settling straight to your wallet at a 0% platform fee (USDC/USDT, BTC, LTC, DASH, DOGE, ZCASH).

Screens the counterparty of an x402 payment before an agent pays it. One tool, screen_payment, checks address sanity, dynamic-payTo swaps, transport safety and your spend policy, then returns allow / review / block with the reasons — advisory only, and by default it runs with no key, no account and no network call.

Resolves a company name, registrable domain, or LEI to its GLEIF legal entity record — LEI, legal name, jurisdiction, entity status, and registration status — for $0.05 USDC on Base paid per call over x402, with no signup or API key. Includes a free, no-wallet preview of price and coverage plus hard per-call and per-session spend caps, while misses and ambiguous matches cost nothing.

Enables blockchain mempool analysis with a free tier for basic queries and a premium tier for deep analysis, gated by a server-side paywall.