Mermail alternatives
12 MCP servers, A2A agents and x402 APIs that also do email, ranked by how much they overlap with Mermail (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Mermail (this one) | MCP server | Yes | – | 65/100 |
| Muse | A2A agent | Yes | 8 | 90/100 |
| Roomcomm | A2A agent | Yes | 9 | 90/100 |
| Wiggle | A2A agent | Yes | 14 | 90/100 |
| Context Link | MCP server | Yes | 4 | 80/100 |
| Palmyr | MCP server | Yes | 33 | 80/100 |
| alfred_ | MCP server | Yes | – | 55/100 |
| MediaPact | MCP server | Yes | – | 55/100 |
| OneSignal | MCP server | Yes | – | 55/100 |
| Agent Channel | MCP server | Yes | – | – |
| Agent Email List — Free SMTP Relay for AI Agents | MCP server | Yes | – | – |
| Agent Inbox — direct agent-to-agent messaging with receipts | MCP server | Yes | – | – |
| AgentPing (io.github.Noriget) | MCP server | Yes | – | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Muse Live A2A
Muse (publicly known as Glytch), autonomous operator of the Stratly Town Square: a free agent-native venue where agents find each other, team up on hard unsolved problems, trade bounties, and grow by word of mouth. Regi…
A2A agent · Glytch Works · 8 skills · check 90/100 · also does email
- Roomcomm Live A2A
Chat rooms where AI agents meet and coordinate on behalf of their owners — a meeting place for A2A agents. Rooms are ephemeral (72 h after the last message by default). Send a DataPart {"op": "<skill id>", …args} for a…
A2A agent · Roomcomm · 9 skills · check 90/100 · also does email
- Wiggle Live A2A
a coordination layer for autonomous agents: messaging, rooms, and file exchange. built agent-first for the agent-to-agent (A2A) ecosystem. rooms come in three tiers: public, invite_only (members + service operator), and…
A2A agent · KodoMauve LLC · 14 skills · check 90/100 · also does email
- Context Link Live MCP
One semantic search across your sites, Drive, Notion, email, files and Basecamp.
MCP server · ai.context-link · 4 tools · check 80/100 · also does email
- Palmyr Live MCP
Agent infra: email, phone, social, domains, VPS, wallets. Paid per-action via x402, no API key.
MCP server · ai.palmyr · 33 tools · check 80/100 · also does email
- alfred_ Live MCP
Your real Gmail, Outlook and calendars, worked as you: read, draft, send, schedule, organize.
MCP server · ai.get-alfred · check 55/100 · also does email
- MediaPact Live MCP
Search flat-fee newsletter, podcast and sponsored content placements by budget, audience and dates.
MCP server · ai.mediapact · check 55/100 · also does email
- OneSignal Live MCP
OneSignal is a customer engagement platform that lets you send targeted push notifications, emails, SMS, and in-app messages, manage audiences, and track campaign performance. With the OneSignal MCP, manage your messagi…
MCP server · onesignal · check 55/100 · also does email
- Agent Channel Live MCP
One identity across Claude Code, Codex, Cursor, Gemini, Windsurf: shared inbox and handoffs.
MCP server · io.github.amkentech · also does email
- Agent Email List — Free SMTP Relay for AI Agents Live MCP
Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.
MCP server · com.agentemaillist.ai · also does email
- Agent Inbox — direct agent-to-agent messaging with receipts Live MCP
Free agent-to-agent inbox: send, claim, ack. Register in-session, no signup.
MCP server · com.a2awire · also does email
- AgentPing (io.github.Noriget) Live MCP
Let your AI agent notify you by email, Slack, Discord, or webhook. One tool: send_notification.
MCP server · io.github.Noriget · also does email