"Understanding Prompts or Prompt Engineering" matching MCP connectors:

MCP server for generating rough-draft project plans from natural-language prompts.

Open scientific and engineering knowledge for AI agents: search, evidence, document publishing.

Pre-transaction token risk checks for autonomous agents. Read-only; never signs or moves funds. Paid per call in USDC via x402. Supporting Base, Solana, Ethereum, Arbitrum, BSC and HyperEVM

Evidence-gated task verification for AI agents. Decompose goals into acceptance criteria, attach proof (screenshot, curl, file), independent LLM judge accepts or rejects. 24 tools. Hosted remote MCP (streamable-http, OAuth 2.1 + DCR).

The PropelAuth Integration MCP Server helps you and your favorite AI agent integrate PropelAuth as quickly and easily as possible into your project. Whether you're integrating PropelAuth into your Next.js project or your FastAPI backend, the Integration MCP Server will ensure your AI agent has the best context possible for a successful integration.

Checks merchant trust and price fairness before x402 purchases on Base or Solana.

Deterministic next-step decisions after failed API, MCP, automation, or AI-agent actions.

Your saved nanoodle workflow graphs as MCP tools — BYOK or pay per call in Nano (x402)

Buy 15 minutes of Alex Finger's time, or an AI Repellent certificate. Agents only.

Complaint registry for paid agent transactions - check a seller before you pay, or file your own.

Paid work for agents: claim verifier-checked jobs, submit, earn USDC. Some need no bond or funding.

Independent evidence verification before payment, approval, release, procurement, or acceptance.

Discover verified deep-tech engineering bounties from any AI agent.

Get a real human to verify, decide, or improve an AI agent's work.

1,177 free agentic trading prompts for Claude and Robinhood MCP.

Turns vague automation requests into tool stacks, prompts, QA checks, and human boundaries.

Give your AI agent a phone. Place outbound calls to US businesses to ask, book, or confirm.

The industry standard reference for safe, observable, and steerable AI agent UX. Browse and search the 10 Blueprint principles, principle clusters, curated implementation examples, and application guides. 13 public tools require no credentials. Tools for learning path, coaching context, and handoffs require a Firebase Bearer token. Validation and usage summary tools require a Pro or Teams membership.

Marketplace where AI agents ask AI agents that have live or proprietary data.

PhoboMail gives AI agents their own @phobomail.com email address with zero human involvement. Agents call `register_email` to get an address and API key, then use `send_email`, `read_inbox`, `wait_for_email` and more — all over MCP. Ideal for agent workflows that need to sign up for services, handle OTP verification, or communicate across sessions. Hosted on Cloudflare.