"RAG MCP servers with quality validation" matching MCP servers:

Pay-per-call x402 APIs for AI agents: DeFi token safety (honeypot/tax simulation, A-F grade), EVM chain data, web access (markdown/screenshot/PDF), speech-to-text. USDC on Base, no account, no API key

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

Enables AI agents to provision, manage, and renew cloud servers with USDC payments via x402, requiring no human signup.

Enables interaction with the PactFi AMM DEX on Algorand, including pool discovery, quote computation, and building swap/liquidity transactions. Integrates with UluOS wallet and broadcast servers for signing and submission.

An MCP server that purchases small factual datasets on demand via x402 micropayments (about $0.01 per call), offering tools for financial research, fuel prices, air quality, and border crossings while supporting preview-only mode and configurable spending limits.

Keyless domain planner that connects external agents to ChainWhisper OTC trading on COTI Mainnet, allowing order preparation and validation without private keys.

Provides read-only, real-time access to TON blockchain data including wallet balances, token holdings, transactions, prices, NFTs, DNS resolution, and address validation, without requiring private keys.

Enables AI assistants to interact with the Pionex exchange through MCP, providing market data, account info, spot trading, grid bots, and Dual Investment tools with strict anti-hallucination guardrails including two-phase order confirmation and live symbol/price validation.

MCP server for Stellar: accounts, payments, XDR, Horizon/Soroban RPC, AMM liquidity, SEP anchors, and Soroban operations. Intended for agents and IDE integrations with strict validation and normalized errors.

MCP server for querying historical and real-time crypto market data across Hyperliquid, Hyperliquid HIP-3, and Lighter.xyz - orderbooks, trades, candles, funding, open interest, liquidations, and data quality metrics.

Enables cryptocurrency trading on Bybit exchange through comprehensive market data access, account management, and automated trading operations. Features smart position validation, trailing stop losses, and risk management tools with demo mode support for safe testing.

Enables existing MCP clients to access paid MCP servers by signing x402 payments locally and proxying tool calls, with automatic line management, retries, and spend limits.

Serves a daily board of cryptocurrency YouTube commentary—coin calls, stances, and dated catalysts—through MCP tools like latest_board and search, with optional paid testnet endpoints for coin details, stance history, and catalyst queries.

A monorepo of MCP servers for Manifest Network and Cosmos SDK chains, enabling natural language interaction with on-chain queries, transactions, lease operations, and provider management.

A TypeScript library that lets you build MCP servers whose tools charge stablecoins per call and AI agents that pay for those tools automatically via the Machine Payments Protocol on Tempo.

HTTP 402 paywall middleware for MCP servers. XRPL/RLUSD native settlement, Phase 3 compliance receipts, zero API keys required.

Enables AI agents to discover trading domains, inspect bots, backtest and submit crypto trading strategies for validation and live deployment, and monitor tournament and leaderboard status via MCP tools.

Enables remote MCP servers to request wallet approvals, signatures, and transactions through an approval URL while keeping private keys in the user's browser wallet.

A local MCP proxy that connects to remote MCP servers and automatically handles x402 payments, signing USDC on-chain when a tool returns HTTP 402.

Drop-in middleware for MCP servers that lets AI agents autonomously pay for tool access on XRPL/Xahau using the x402 protocol.