{"ok":true,"name":"cooper_send_message","description":"Use this when the user asks the agent to send an email from its Cooper address. Requires auth. Delivers real email on the public Internet and stores a copy. Inputs: inbox_id (required; inbox id, username, or email), to (required; array of recipient addresses), subject (required), text and/or html body, cc, bcc, reply_to, headers, labels, in_reply_to (optional; a msg_ id threads onto that message using its Message-ID header and thread_id; any other value is sent as In-Reply-To), attachments (opti","inputSchema":{"type":"object","required":["inbox_id","to","subject"],"properties":{"cc":{"type":"array","items":{"type":"string"},"description":"Cc addresses"},"to":{"type":"array","items":{"type":"string"},"description":"Recipient email addresses"},"bcc":{"type":"array","items":{"type":"string"},"description":"Bcc addresses"},"html":{"type":"string","description":"Optional HTML body"},"text":{"type":"string","description":"Plain-text body"},"labels":{"type":"array","items":{"type":"string"},"description":"Labels stored on the message. Defaults to [\"sent\"]."},"headers":{"type":"object","description":"Optional extra headers. Each name maps to a string value.","additionalProperties":{"type":"string"}},"subject":{"type":"string","description":"Subject line"},"inbox_id":{"type":"string","description":"Inbox id (inb_…), username, or full email address"},"reply_to":{"type":"string","description":"Reply-To address. Defaults to this inbox."},"client_id":{"type":"string","description":"Optional client_id. The same value returns the original message."},"attachments":{"type":"array","items":{"type":"object","required":["filename","content_base64"],"properties":{"filename":{"type":"string"},"content_id":{"type":"string"},"content_type":{"type":"string"},"content_base64":{"type":"string"}}},"description":"Optional files, base64-encoded"},"in_reply_to":{"type":"string","description":"Thread this send under a message. A msg_ id uses that message's Message-ID header and thread_id. Any other value is copied to In-Reply-To."},"idempotency_key":{"type":"string","description":"Optional Idempotency-Key header. 1 to 256 characters: letters, digits, and - . _ ~. The same key and request within 24 hours returns the original message."},"include_signature":{"type":"boolean","description":"Use this when this one message should skip the inbox signature. Default true. false sends the body as written."}}},"serverUrl":"https://cooperemail.com/mcp","transport":"http","handshake":"ok","host":"cooperemail.com","score":93,"grade":"A","auth":"oauth","lastScannedAt":"2026-10-30T13:05:15.807Z","stale":false,"permalink":"https://agentboardai.app/mcp/cooperemail.com/cooper_send_message","page":"https://agentboardai.app/site/cooperemail.com"}