"Construct 3" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Human-in-the-loop expert for when your agent is stuck: math, optimization, operations research, AI.
Feature-request board for software teams: users vote, your coding agent pulls the top request as a spec over MCP, voters get emailed when it ships.
Design 3-4 signatures for a user, free signatures, Pro/Teams prices, install steps. No account.
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MCP server for e-mail testing: create disposable inboxes, wait for delivery, and extract e-mail content or links - all from your AI agent or test automation workflow. Get a free API key on https://app.zyntra.app/
Autonomous B2B outreach copilot with 22 tools. Finds live companies via Google Search Grounding (no stale databases), verifies decision-maker emails with a 16-pattern Microsoft 365 hunter, generates 50/50 personalized 3-step letters, and schedules timezone-aware Gmail outreach via write-only OAuth. Apollo.io alternative from $12/mo.
Disposable inboxes for AI agents: create, wait for delivery, and extract email content or links.