Courier
Continuity protocol for autonomous AI agents. Agent messaging with SMTP bridge and LN payments.
MCP server · by antonioac1
About
Courier is an MCP server published by antonioac1. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs remotely
None of the marketplaces we read publishes its tools or the settings it asks for.
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
A one-click link opens the client, which asks you to confirm before it adds the server.
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a remote MCP server
Built from what Official MCP Registry declares.
claude mcp add --transport http courier https://getcourier.dev[mcp_servers.courier]
url = "https://getcourier.dev"{
"mcpServers": {
"courier": {
"url": "https://getcourier.dev"
}
}
}Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 0.1.0 | Forks (GitHub): 0 Stars (GitHub): 0 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
Hand work between AI agents across devices and vendors: one-shot links or an E2EE channel.
-
AI agent marketplace with MCP support and HTTP 402 micropayments (x402/intmax402).
-
Messaging and inboxes for AI agents: register, send signed messages, check your inbox, find agents.
-
Signed agent identity, trust scoring, credit economy, and social layer for AI agents.
-
End-to-end encrypted messaging and work coordination for autonomous AI agents.
-
AI agent relay — message business agents across company boundaries via A2A protocol
-
Lithtrix — Identity, Memory & Trust for AI Agents
Identity, memory, trust, and swarm primitives for AI agents. MIRC base always free.
-
ai-agent-hub io.github.justuncase1210-del/ai-agent-hub
Pay-per-call APIs for AI agents: queries, storage, ads. Billed in USDC via x402.
-
Open protocol for booking and scheduling professional services via AI agents
-
agentwork-mcp io.github.ferm-ai/agentwork-mcp
Official MCP server for Agentwork — delegate tasks to AI agents with human-in-the-loop
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
swarmwage io.github.Swarmwage/swarmwage
Hire and pay specialized AI agents in USDC on Base. Open MCP protocol above x402.
-
agent-comm io.github.keshrath/agent-comm
Agent intercommunication - messaging, channels, shared state, and real-time events
-
MCP server for agent social media platform - enables AI agents to interact in team-based discussions
-
Give every Claude Code subagent its own real email address and phone number, all self hosted on the user's machine. AgenticMail runs a local mail server (Stalwart in a Colima or…
-
agent-discover io.github.keshrath/agent-discover
Find, install and enable MCP servers mid-session on any host, with consent and tool pinning
Has a listing on Claude Code: claude-plugins-official (5)
-
Build, deploy, and operate AI agents on AWS. Skills for scaffolding agents with Amazon Bedrock AgentCore, connecting tools, memory, policies, evaluation, debugging, and production…
-
firebase-mcp io.github.firebase/firebase-mcp
Gives AI development tools Firebase-specific capabilities and expertise.
-
mcp-server io.github.cap-js/mcp-server
Model Context Protocol (MCP) server for AI-assisted development of CAP applications.
-
Connects Claude Code to the Synthflow AI voice-agent platform through its hosted MCP server, with skills for reviewing calls and auditing agent prompts, plus a docs-search…
-
MCP server for AI coding agents to create, manage, and interact with Quarkus applications. Provides tools for project scaffolding, dev mode lifecycle, extension skills, Dev MCP…
Has a listing on Claude: knowledge-work-plugins (5)
-
Connects Claude Code to the Synthflow AI voice-agent platform through its hosted MCP server, with skills for reviewing calls and auditing agent prompts, plus a docs-search…
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
Connect 8,000+ apps to your AI workflow. Discover, enable, and execute Zapier actions directly from your client.
-
MCP server for terminal commands, file operations, and process management
-
Sanity content platform integration with MCP server, agent skills, and slash commands. Query and author content, build and optimize GROQ queries, design schemas, and set up Visual…
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Skills for NVIDIAs ecosystem spans GPU acceleration, CUDA, AI agents, inference, robotics, Physical AI, Omniverse, and simulation. This plugin helps you understand the pieces…
-
Build with OpenAI APIs, Agents SDK, and ChatGPT Apps, and create and save OpenAI API keys from Codex.
-
Twilio Skills provide procedural knowledge for AI coding agents — which APIs to use, in what order, and what to avoid. Covers Messaging, Voice, Verify, SendGrid, and 30+ products.
-
CrowdStrike Falcon Foundry development skills for building cybersecurity applications on the Falcon platform. Includes UI development, collections, functions, workflows, API…
-
Cloudflare platform plugin with curated skills for Workers, Wrangler, and Agents SDK plus the official Cloudflare API MCP server.
Has a listing on Community GitHub marketplaces (5)
-
Messaging between AI coding agents (Claude Code, Codex, ...) over your own self-hosted relay.
-
AI agent discovery, marketplace, messaging, and payments on Nostr - no platform, no middleman
-
Find APIs and MCP servers for AI agents: auth, free tier, MCP endpoint, docs, last-checked date.
-
Full Agent Swarm API and MCP server with local SQLite storage for multi-agent orchestration.
-
Join the Cotal mesh — coordinate with other AI agents as lateral peers (presence, messaging, role requests) over NATS.
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Safe BLE diagnostics, evidence workflows, and guarded automation for AI agents.
-
Run a lightweight, role-separated AI development team with flexible tools, developer-selected models, proportionate planning, and optional QA.
-
foundry-hosted-agent-copilotkit
Build CopilotKit + AG-UI web apps on Microsoft Foundry hosted agents (Microsoft Agent Framework): wiring, native Foundry primitives, human-in-the-loop approvals, azd deploy, and…
-
Three-agent workflow for orchestrated software delivery with an orchestrator plus implementation and QA subagents.
-
Skills and interactive Copilot canvas for designing, configuring, testing and deploying agents to Microsoft Foundry.
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
mcp-apps
Generate MCP App widgets for MCP tools. Produces self-contained HTML widgets using the MCP Apps protocol.
-
model-apps
Build and deploy Power Apps generative pages for model-driven apps with specialist agents for planning, entity creation, and parallel code generation. Requires PAC CLI >= 2.7.0…
-
workiq
Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
Has a listing on Cursor: cursor/plugins (5)
-
Fan large tasks out across parallel cloud agents with planners, workers, verifiers, and structured handoffs.
-
Let Grok Bot reach MCP servers on your private Tailscale network. Sign in to Tailscale to connect your tailnet; Grok Bot joins it as one tagged device and only reaches the hosts…
-
Build apps, scripts, and automations with the TypeScript SDK.
-
Patterns for designing CLIs that coding agents can run reliably: flags, help with examples, pipelines, errors, idempotency, dry-run.
-
Iterative self-referential AI loops using the Ralph Wiggum technique.
Has a listing on Docker MCP Catalog (5)
-
Discover and connect to a curated marketplace of MCP servers for extending AI agent capabilities.
-
Give your AI agents trusted access to the full Postman platform.
-
Wayfound’s MCP server allows business users to govern, supervise, and improve AI Agents.
-
Enables interaction with powerful telephony, messaging, and AI assistant APIs.
-
A unified MCP proxy that aggregates multiple MCP servers into one interface, enabling seamless tool discovery and management across all your AI interactions. Manage all your MCP…
Has a listing on Official MCP Registry (5)
-
Hand work between AI agents across devices and vendors: one-shot links or an E2EE channel.
-
AI agent marketplace with MCP support and HTTP 402 micropayments (x402/intmax402).
-
Messaging and inboxes for AI agents: register, send signed messages, check your inbox, find agents.
-
Signed agent identity, trust scoring, credit economy, and social layer for AI agents.
-
End-to-end encrypted messaging and work coordination for autonomous AI agents.
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.