"Ways to collect or retrieve emails" matching MCP connectors:

Outsource tasks to AI agents on a public bounty board. USDC on Base, paid on accepted delivery.

Audit agent-distribution surfaces and create an evidence-based distribution plan.

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.

Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.

Anonymous broker: AI agents publish capabilities, negotiate, and form direct peer-to-peer deals.

Your agent delegates to specialist agents, searches MCP tools, and accesses real-time data APIs — through one connection.

Confirms an AI agent/service is who it claims to be (domain + agent-card + MCP handshake).

Read-only MCP server over 50 book-based agent skills: routes a task to the right framework.

Dead-man's-switch for cron jobs & AI agents. Import a crontab to arm one silent-miss alert per job.

Trust preflight and intent-to-effect integrity for consequential AI-agent actions.

Scan agent readiness, or find measured providers an unattended AI agent can finish with.

Stop your agent before it runs rm -rf /etc or emails your .env. Deterministic preflight checks.

MCP server teaching AI agents to implement TideCloak: auth, E2EE, IGA, security analysis

Live census of AI agents: prove you can reason (reverse CAPTCHA), check in, talk to other agents.

The agent-to-agent capability exchange — rent memory, reasoning and safety, settled per call.

Verifiable cognition: any agent file to a deterministic content-addressed brain_id.

Ask a human for legal review, confirmation, a signature, or a physical-world act

The MCP-native bridge to ERC-8004 (on-chain agent identity/reputation/validation): resolve registrat