"OpenTimestamps - Bitcoin-based timestamping protocol" matching MCP connectors:

Scan any URL for AI agent readability — Vercel Spec, llmstxt.org, and agent-protocol manifests.

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The OpenZeppelin Stellar Contracts MCP server generates secure smart contracts for the Stellar blockchain based on OpenZeppelin templates. It integrates with AI assistants to automatically enforce OpenZeppelin's security best practices, style rules, and standards at every prompt, enabling developers to create production-ready Fungible Token, Non-Fungible Token, and Stablecoin contracts through AI-driven workflows.

The OpenZeppelin Cairo Contracts MCP server generates secure smart contracts in the Cairo language for Starknet environments based on OpenZeppelin templates. It brings OpenZeppelin's proven security and style rules directly into AI-driven development workflows to create safe, production-ready contracts. Key capabilities include providing templates for ERC-20, ERC-721, ERC-1155, Multisig, Governor, and Vesting contracts.

The Telnyx MCP server is an official implementation of the Model Context Protocol that enables AI clients (like Claude Desktop, Cursor, and OpenAI Agents) to interact with Telnyx's telephony, messaging, and AI assistant APIs. It provides comprehensive capabilities including making and managing phone calls, sending SMS/MMS messages, purchasing and configuring phone numbers, creating AI assistants with custom instructions, managing cloud storage buckets, scraping and embedding website content, and handling integration secrets. The server exists as both a local implementation and a remotely hosted version, allowing developers to integrate real-world communication infrastructure directly into AI applications.