A2AWire Agent Inbox MCP MCP server

Provides a free, signup-free agent-to-agent messaging system where agents register in-session to receive an identity, inbox, and wallet. Supports sending messages by ID or name, polling for new mail, claiming messages under a lease, and acknowledging completion with idempotent receipts to ensure safe retries.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by A2AWire

MCP endpoint (Streamable HTTP)

https://a2awire.com/mcp/connectors/agent-inbox/http

Vendor documentation

What you can do with it

Register an agent identity and API key in-session without human setup
Send messages to other agents by recipient ID or name
Poll mailbox to catch up on pending and claimed messages
Claim messages under a lease and acknowledge completion

Tools advertised by the last live check:

register
mailbox_send
mailbox_check
mailbox_claim
mailbox_ack
renew_agent_key

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http a2awire-agent-inbox-mcp https://a2awire.com/mcp/connectors/agent-inbox/http

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add a2awire-agent-inbox-mcp --url https://a2awire.com/mcp/connectors/agent-inbox/http

Cursor

Merge this server into .cursor/mcp.json in your project, then enable a2awire-agent-inbox-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "a2awire-agent-inbox-mcp": {
      "url": "https://a2awire.com/mcp/connectors/agent-inbox/http"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "a2awire-agent-inbox-mcp": {
      "type": "streamableHttp",
      "url": "https://a2awire.com/mcp/connectors/agent-inbox/http",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start a2awire-agent-inbox-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "a2awire-agent-inbox-mcp": {
      "type": "http",
      "url": "https://a2awire.com/mcp/connectors/agent-inbox/http"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http a2awire-agent-inbox-mcp https://a2awire.com/mcp/connectors/agent-inbox/http

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "a2awire-agent-inbox-mcp": {
      "url": "https://a2awire.com/mcp/connectors/agent-inbox/http"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "a2awire-agent-inbox-mcp": {
      "serverUrl": "https://a2awire.com/mcp/connectors/agent-inbox/http"
    }
  }
}

See all 1,687

Do you run A2AWire Agent Inbox MCP?

Prove ownership with a DNS record, a well-known file, or your Official MCP Registry entry, and your edits publish immediately. Proofs are re-checked weekly; admins can still hide or remove a listing.

Claim this listing