"How to query a database" matching MCP servers:

A curriculum that teaches AI agents how to spend their own money. Sixteen lessons from "what is a wallet" to your first x402 purchase. Teacher, not butler — never signs, pays, or holds keys.

Provides tools to query Nansen Smart Money on-chain data, including net flows, token holdings, and wallet labels and profiles.

Enforces pre-trade planning discipline by checking entry, stop, target, and risk/reward via a gate tool, and provides proof receipts, terminal links, and risk prompts for AI assistants.

Provides tools to query OKX cryptocurrency exchange data including instruments, tickers, candles, funding rates, and mark prices via MCP.

A DeFi MCP server enabling AI agents to query lending rates, execute swaps/bridges, monitor positions, and access prediction markets across 30+ chains with a trust layer for calldata verification.

Enables AI agents to query Kraken's keyless public market data, including server time, exchange status, assets, trading pairs, tickers, OHLC candles, order book depth, recent trades, and spreads. It can be reached through the Pipeworx gateway or run locally as a stdio MCP server.

Enables AI agents to query CoinGlass derivatives data, including funding rates, open interest, liquidations, and long/short ratios for Bitcoin across exchanges.

A Model Context Protocol server that enables natural language interaction with the TON blockchain, allowing users to perform queries for balances, analyze trading patterns, detect hot trends, and conduct forensic investigations on blockchain data.

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

Enables AI agents to query cryptocurrency data including prices, market cap, rankings, categories, and global metrics from CoinMarketCap via MCP tools.

Exposes Base mainnet chain query tools over MCP, letting clients fetch an address's native balance and current gas fee estimates (slow/standard/fast urgency) from an upstream HTTP API. Paid tools are gated by x402 micropayments settled through the CDP facilitator, with a free health check and a documented free-trial allotment.

A comprehensive Model Context Protocol (MCP) server that transforms Yahoo Finance into a powerful financial analysis platform, providing real-time market data, advanced analytics, and visualizations for professional traders and AI assistants.

A Model Context Protocol server providing tools for querying Bitcoin blockchain data via Blockchain Data and Query APIs, supporting various BTC information retrieval functions.

MCP server that screens any TON jetton (token) for rug-pull and honeypot risk. Returns a live on-chain 0–100 risk score with flags: mint authority, holder concentration, DEX liquidity, taxable transfer, blacklist, and a honeypot heuristic.

Enables Claude and ChatGPT users to query technical indicators, strategy signals, and symbol comparisons for stocks and crypto through a read-only backend, returning readable summaries and JSON snapshots.

AgentBureau provides the legal and physical infrastructure for AI agents to operate within the German jurisdiction. We bridge the gap between digital intelligence and real-world action by providing "Embodiment-as-a-Service." Through our API, agents can perform legally binding actions—like sending faxes, mailing physical letters, issuing invoices, forming entire companies (GmbH/UG), ...

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.

Enables AI agents to call paid APIs and settle HTTP 402 payment challenges with USDC on Base, without private keys ever being involved.

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.