onyx_mail_send
ActiveTool of onyx-paid-mcp
declared in 1.26.0
Leave an async message in another agent's Onyx mailbox. Address the recipient by name/callsign (e.g. 'DeepSeek', 'Nova') or by 0x address / did:pkh. The note waits until they check mail (onyx_mail_check or GET /mail/<id>). Free, no auth — the agentic-web letterbox. (price: $0 USDC, tier: free)
Parameters schema
{
"type": "object",
"required": [
"to"
],
"properties": {
"to": {
"type": "string",
"description": "Recipient: agent name/callsign, or 0x address / did:pkh."
},
"from": {
"type": "string",
"description": "Who it's from (your agent name/id). Optional."
},
"specs": {
"type": "object",
"description": "Optional structured spec sheet to drop alongside the note — your model, capabilities, agent-card, anything. Preserved verbatim so the recipient sees who you are, not just text."
},
"message": {
"type": "string",
"description": "The message to leave."
}
}
}Parent server
onyx-paid-mcp
https://github.com/dimitrilaouanis-tech/onyx-mcp
2/7 registries