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Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results.
MCP endpoint :https://callbacks.inversolabs.us/mcp · measurements and detailsSelect an event callback address
MCP endpoint :https://openings-vote-drilling-initially.trycloudflare.com/mcp/event-callback-planner · measurements and detailsRead, send, file and search email in any Gmail, Microsoft 365 or IMAP mailbox, plus its calendar.
MCP endpoint :https://mcp.mailbox-mcp.com/db/mcp · website · measurements and detailsGive AI agents secure access to your email via private aliases with dedicated mailbox storage.
MCP endpoint :https://mcp.po6.com · website · measurements and detailsPhysical mail API for AI agents. Send letters, certified mail. Sandbox + live keys via MCP.
MCP endpoint :https://mailbox.bot/api/mcp · website · measurements and detailsMailbox + wake system for AI agent teams: letters always land, right agent wakes, quiet otherwise.
Package pypi :agent-mailbox · website · measurements and detailsSelf-hosted MCP server for unified IMAP/SMTP mailbox access: read, list, and send email.
Package oci :docker.io/psyb0t/mailbox:v0.4.15 · website · measurements and detailsRead, search and organise any IMAP mailbox, with writes off by default
Package npm :@ni-c/imap-mcp · website · measurements and detailsTidy a large Outlook / Hotmail mailbox. Folder subtree moves, bulk ops with dry run, never sends.
Package oci :ghcr.io/ma2no4413/outlook-mcp:0.2.7 · website · measurements and detailsDisposable email inboxes for testing — create addresses, wait for messages, extract links.
MCP endpoint :https://mail.rjctdlabs.xyz/sse · measurements and detailsWebhook & callback layer for AI agents: create a URL, wait_for_callback, and verify over MCP.
Package npm :@hooksense/mcp · website · measurements and detailsUnauthenticated OAuth2 callback collector for Tollbooth MCP services
MCP endpoint :https://tollbooth-oauth2-collector.fastmcp.app/mcp · website · measurements and detailsRegister an event callback address
MCP endpoint :https://openings-vote-drilling-initially.trycloudflare.com/mcp/subscription-receipt-desk · measurements and detailsPublic webhook inboxes for agents. Receive OAuth redirects, payment callbacks and CI notifications.
MCP endpoint :https://comiza.lighting/mcp · website · measurements and detailsCallback URLs, email return paths, ordered events and JSON context for ephemeral AI agents.
MCP endpoint :https://agentaddress.dev/api/mcp · website · measurements and detailsLicensed California insurance broker (#6003045), EN/ES: products, offices, quotes, guides, callback.
MCP endpoint :https://viarapidaservices.com/mcp · website · measurements and detailsLets AI agents get leads on the phone: call, send SMS, and schedule callbacks for sales teams.
MCP endpoint :https://api.callingly.com/mcp · website · measurements and detailsCreate AI-powered short-form video clips from YouTube videos. Supports webhook callbacks.
MCP endpoint :https://mcp.ssemble.com/mcp · website · measurements and detailsInstant no-signup webhook & HTTP-request inspector for testing webhooks and agent tool-callbacks.
MCP endpoint :https://catchr.perch-app.workers.dev/mcp · website · measurements and detailsLicensed CA broker (#6003045), EN/ES: GL, workers comp, contractor bonds, landlord, callback.
MCP endpoint :https://myinsurancecity.com/mcp · website · measurements and detailsAI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt
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