"A tool or technique to improve prompt writing" matching MCP servers:

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

Enables AI agents to deploy and manage compliant tokens across multiple blockchains (EVM, Solana, Stellar) using natural language, with features like whitelist, blacklist, and pausable contracts.

Provides cryptocurrency market data using the CoinGecko API

Provides financial data including stock prices, cryptocurrency rates, forex rates, and compound interest calculations, as well as financial news retrieval through various APIs.

Provides technical analysis tools for cryptocurrency trading data, calculating EMAs (12 and 26 periods) for Binance pairs using MongoDB for data storage.

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), ...

Enables AI agents to pay for MCP tool calls using either Bitcoin/Lightning (L402) or USDC (x402) rails, with unified settlement and a 21% discount for Bitcoin payments.

Provides real-time XLM (Stellar) market sentiment as a tool, computed from a keyless composite of the Crypto Fear & Greed Index, SDEX order-flow imbalance, and 24h price momentum. Enables users to get deterministic sentiment scores and market data without any API keys or paid data feeds.

Provides a 1-line USDC paywall wrapper for any FastMCP tool using the Coinbase x402 protocol, enabling pay-per-call endpoints settled on Base, Polygon, Solana, or Bitcoin Lightning.

Enables agents to discover and execute Stellar ecosystem services and skills via a search tool and a sandboxed JavaScript execution tool, deployed on Cloudflare Workers.

Enables read-only analysis of Binance Spot markets through a single MCP tool that fetches live public market data and generates a Trade Readiness Passport with WATCH, RESEARCH_MORE, or NO_TRADE outcomes.

Enables AI agents to pay per tool call in USDC via the x402 micropayment protocol, with no API keys or subscriptions required.

Enables AI agents to trade on Binance through a governed MCP proxy that enforces configurable policies, requires a recorded rationale before orders, detects prompt injection, logs all actions in a tamper-evident audit trail, and blocks execution until a human approves.

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.

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.

Hourly news sentiment and typed market events (hack, regulation, listing, delisting, legal) for 30 crypto pairs, with source links on every signal. Four tools cover the latest score per symbol, history, classified events and the symbol list, and a free API key works out of the box

MCP server for l402-kit — enables AI agents (Claude, Cursor, etc.) to autonomously pay Bitcoin Lightning-protected APIs. Tools: l402_fetch, l402_balance, l402_spending_report. Run with: npx l402-kit-mcp