Inboxes - Send Message
curl --request POST \
--url https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"attachments": [
{
"content": "<string>",
"content_id": "<string>",
"content_type": "<string>",
"filename": "<string>",
"url": "<string>"
}
],
"bcc": "<string>",
"cc": "<string>",
"headers": {},
"html": "<string>",
"labels": [
"<string>"
],
"reply_to": "<string>",
"subject": "<string>",
"text": "<string>",
"to": "<string>",
"track_opens": true
}
'import requests
url = "https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send"
payload = {
"attachments": [
{
"content": "<string>",
"content_id": "<string>",
"content_type": "<string>",
"filename": "<string>",
"url": "<string>"
}
],
"bcc": "<string>",
"cc": "<string>",
"headers": {},
"html": "<string>",
"labels": ["<string>"],
"reply_to": "<string>",
"subject": "<string>",
"text": "<string>",
"to": "<string>",
"track_opens": True
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
attachments: [
{
content: '<string>',
content_id: '<string>',
content_type: '<string>',
filename: '<string>',
url: '<string>'
}
],
bcc: '<string>',
cc: '<string>',
headers: {},
html: '<string>',
labels: ['<string>'],
reply_to: '<string>',
subject: '<string>',
text: '<string>',
to: '<string>',
track_opens: true
})
};
fetch('https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'attachments' => [
[
'content' => '<string>',
'content_id' => '<string>',
'content_type' => '<string>',
'filename' => '<string>',
'url' => '<string>'
]
],
'bcc' => '<string>',
'cc' => '<string>',
'headers' => [
],
'html' => '<string>',
'labels' => [
'<string>'
],
'reply_to' => '<string>',
'subject' => '<string>',
'text' => '<string>',
'to' => '<string>',
'track_opens' => true
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send"
payload := strings.NewReader("{\n \"attachments\": [\n {\n \"content\": \"<string>\",\n \"content_id\": \"<string>\",\n \"content_type\": \"<string>\",\n \"filename\": \"<string>\",\n \"url\": \"<string>\"\n }\n ],\n \"bcc\": \"<string>\",\n \"cc\": \"<string>\",\n \"headers\": {},\n \"html\": \"<string>\",\n \"labels\": [\n \"<string>\"\n ],\n \"reply_to\": \"<string>\",\n \"subject\": \"<string>\",\n \"text\": \"<string>\",\n \"to\": \"<string>\",\n \"track_opens\": true\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"attachments\": [\n {\n \"content\": \"<string>\",\n \"content_id\": \"<string>\",\n \"content_type\": \"<string>\",\n \"filename\": \"<string>\",\n \"url\": \"<string>\"\n }\n ],\n \"bcc\": \"<string>\",\n \"cc\": \"<string>\",\n \"headers\": {},\n \"html\": \"<string>\",\n \"labels\": [\n \"<string>\"\n ],\n \"reply_to\": \"<string>\",\n \"subject\": \"<string>\",\n \"text\": \"<string>\",\n \"to\": \"<string>\",\n \"track_opens\": true\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"attachments\": [\n {\n \"content\": \"<string>\",\n \"content_id\": \"<string>\",\n \"content_type\": \"<string>\",\n \"filename\": \"<string>\",\n \"url\": \"<string>\"\n }\n ],\n \"bcc\": \"<string>\",\n \"cc\": \"<string>\",\n \"headers\": {},\n \"html\": \"<string>\",\n \"labels\": [\n \"<string>\"\n ],\n \"reply_to\": \"<string>\",\n \"subject\": \"<string>\",\n \"text\": \"<string>\",\n \"to\": \"<string>\",\n \"track_opens\": true\n}"
response = http.request(request)
puts response.read_body{
"message_id": "<string>",
"thread_id": "<string>"
}Messages
Inboxes - Send Message
Sends a new email from one inbox and returns message_id and thread_id.
POST
https://api.aisa.one
/
apis
/
v1
/
agentmail
/
inboxes
/
{inbox_id}
/
messages
/
send
Inboxes - Send Message
curl --request POST \
--url https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"attachments": [
{
"content": "<string>",
"content_id": "<string>",
"content_type": "<string>",
"filename": "<string>",
"url": "<string>"
}
],
"bcc": "<string>",
"cc": "<string>",
"headers": {},
"html": "<string>",
"labels": [
"<string>"
],
"reply_to": "<string>",
"subject": "<string>",
"text": "<string>",
"to": "<string>",
"track_opens": true
}
'import requests
url = "https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send"
payload = {
"attachments": [
{
"content": "<string>",
"content_id": "<string>",
"content_type": "<string>",
"filename": "<string>",
"url": "<string>"
}
],
"bcc": "<string>",
"cc": "<string>",
"headers": {},
"html": "<string>",
"labels": ["<string>"],
"reply_to": "<string>",
"subject": "<string>",
"text": "<string>",
"to": "<string>",
"track_opens": True
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
attachments: [
{
content: '<string>',
content_id: '<string>',
content_type: '<string>',
filename: '<string>',
url: '<string>'
}
],
bcc: '<string>',
cc: '<string>',
headers: {},
html: '<string>',
labels: ['<string>'],
reply_to: '<string>',
subject: '<string>',
text: '<string>',
to: '<string>',
track_opens: true
})
};
fetch('https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'attachments' => [
[
'content' => '<string>',
'content_id' => '<string>',
'content_type' => '<string>',
'filename' => '<string>',
'url' => '<string>'
]
],
'bcc' => '<string>',
'cc' => '<string>',
'headers' => [
],
'html' => '<string>',
'labels' => [
'<string>'
],
'reply_to' => '<string>',
'subject' => '<string>',
'text' => '<string>',
'to' => '<string>',
'track_opens' => true
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send"
payload := strings.NewReader("{\n \"attachments\": [\n {\n \"content\": \"<string>\",\n \"content_id\": \"<string>\",\n \"content_type\": \"<string>\",\n \"filename\": \"<string>\",\n \"url\": \"<string>\"\n }\n ],\n \"bcc\": \"<string>\",\n \"cc\": \"<string>\",\n \"headers\": {},\n \"html\": \"<string>\",\n \"labels\": [\n \"<string>\"\n ],\n \"reply_to\": \"<string>\",\n \"subject\": \"<string>\",\n \"text\": \"<string>\",\n \"to\": \"<string>\",\n \"track_opens\": true\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"attachments\": [\n {\n \"content\": \"<string>\",\n \"content_id\": \"<string>\",\n \"content_type\": \"<string>\",\n \"filename\": \"<string>\",\n \"url\": \"<string>\"\n }\n ],\n \"bcc\": \"<string>\",\n \"cc\": \"<string>\",\n \"headers\": {},\n \"html\": \"<string>\",\n \"labels\": [\n \"<string>\"\n ],\n \"reply_to\": \"<string>\",\n \"subject\": \"<string>\",\n \"text\": \"<string>\",\n \"to\": \"<string>\",\n \"track_opens\": true\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"attachments\": [\n {\n \"content\": \"<string>\",\n \"content_id\": \"<string>\",\n \"content_type\": \"<string>\",\n \"filename\": \"<string>\",\n \"url\": \"<string>\"\n }\n ],\n \"bcc\": \"<string>\",\n \"cc\": \"<string>\",\n \"headers\": {},\n \"html\": \"<string>\",\n \"labels\": [\n \"<string>\"\n ],\n \"reply_to\": \"<string>\",\n \"subject\": \"<string>\",\n \"text\": \"<string>\",\n \"to\": \"<string>\",\n \"track_opens\": true\n}"
response = http.request(request)
puts response.read_body{
"message_id": "<string>",
"thread_id": "<string>"
}Sends a new email from one inbox and returns
Set this endpoint up in your agent →
message_id and thread_id. Takes to, cc, bcc, subject, text, html, labels and attachments. 🔴 This sends real email and it cannot be recalled. Every AIsa caller shares one AgentMail account, so this reaches inboxes other callers created, so the sending address may not be one you created — check get_agentmail_inbox first. To answer an existing message use post_agentmail_inbox_message_reply; to write without sending, post_agentmail_inbox_draft.
Example
curl -X POST "https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY"
// Copy this whole block into Claude Code, Codex, Cursor or any coding agent.
// It carries everything needed to connect, authorize and run this example —
// no key to paste, one click of Allow in the browser.
{
"calls": [
{
"call_id": "1",
"tool": "post_agentmail_inbox_message_send",
"arguments": {}
}
]
}
// ── for the agent ─────────────────────────────────────────────────────────
// Register the AIsa MCP server, then call its `batch_quote` tool with the JSON above.
// name aisa
// endpoint https://mcp.aisa.one/mcp
// transport streamable-http
// auth OAuth. The server publishes RFC 9728 metadata, so open a
// browser and the user clicks Allow once — nothing to paste.
// If AISA_API_KEY is set, send it as a bearer header instead.
// Use your own MCP mechanism, not a hand-edited config file:
// Codex codex mcp add aisa --url https://mcp.aisa.one/mcp
// Claude Code claude mcp add --transport http -s user aisa https://mcp.aisa.one/mcp
// Cursor / VS Code a "url" entry for https://mcp.aisa.one/mcp in the MCP config
// The server reaches https://mcp.aisa.one/servers worth of APIs through a few meta
// tools: search, list_categories, get_details, batch_quote, batch_use.
// search, get_details and batch_quote are free; batch_use is billed per
// call. This operation's full contract — every argument, the response
// shape, the price and the pitfalls — is at
// https://aisa.one/docs/api-reference/agentmail/post_agentmail-inboxes-inbox-id-messages-send.md
// Show me the quoted cost. Once I approve, run the same calls with
// batch_use and show me the result.
First time? Point any MCP client at
https://mcp.aisa.one/mcp — Claude
Code, Codex, Cursor, VS Code and the rest. Authorization is OAuth: the client
opens a browser, you click Allow once, and there is no key to paste. Your
agent then reaches every endpoint through a few meta tools: search,
list_categories, get_details and batch_quote are free, batch_use is
billed per call. Setup per client is in
Connect via MCP; the live tool list and what each call
costs are on aisa.one/mcp.Request contract
- Method and path: POST /apis/v1/agentmail/inboxes/{inbox_id}/messages/send
- Availability: enabled
- Request URL template: https://api.aisa.one/apis/v1/agentmail/inboxes/{inbox_id}/messages/send
- inbox_id: path; required
- Runtime facts: 18a04e28941fae19674c11246b677373368b6bd927b7c146220cec1f168f4639
{
"operationId": "post_agentmail_inbox_message_send",
"method": "POST",
"path": "/apis/v1/agentmail/inboxes/{inbox_id}/messages/send",
"servers": [
{
"url": "https://api.aisa.one"
}
],
"parameters": [
{
"in": "path",
"name": "inbox_id",
"required": true,
"schema": {
"description": "The ID of the inbox.",
"title": "InboxId",
"type": "string"
}
}
],
"security": [
{
"bearerAuth": []
}
],
"requestBody": {
"content": {
"application/json": {
"schema": {
"properties": {
"attachments": {
"description": "Attachments to include in message.",
"items": {
"description": "Provide either `content` or `url` for each attachment.",
"properties": {
"content": {
"description": "Base64 encoded content of the attachment. The entire request, including the message body and all attachments, is limited to 6 MB.",
"type": "string"
},
"content_disposition": {
"description": "Content disposition of attachment.",
"enum": [
"inline",
"attachment"
],
"title": "AttachmentContentDisposition",
"type": "string"
},
"content_id": {
"description": "Content ID of attachment.",
"title": "AttachmentContentId",
"type": "string"
},
"content_type": {
"description": "Content type of attachment.",
"title": "AttachmentContentType",
"type": "string"
},
"filename": {
"description": "Filename of attachment.",
"title": "AttachmentFilename",
"type": "string"
},
"url": {
"description": "URL that AgentMail can download without custom authentication headers or cookies.\nRedirects and pre-signed URLs are supported, and the final response must be a\nsuccessful 2xx response. Keep URL-backed attachments around 30 MB total per message.",
"type": "string"
}
},
"title": "SendAttachment",
"type": "object"
},
"title": "SendMessageAttachments",
"type": "array"
},
"bcc": {
"description": "BCC recipient address or addresses.",
"oneOf": [
{
"type": "string"
},
{
"items": {
"type": "string"
},
"type": "array"
}
],
"title": "SendMessageBcc"
},
"cc": {
"description": "CC recipient address or addresses.",
"oneOf": [
{
"type": "string"
},
{
"items": {
"type": "string"
},
"type": "array"
}
],
"title": "SendMessageCc"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"description": "Headers to include in message.",
"title": "SendMessageHeaders",
"type": "object"
},
"html": {
"description": "HTML body of message.",
"title": "MessageHtml",
"type": "string"
},
"labels": {
"description": "Labels of message.",
"items": {
"type": "string"
},
"title": "MessageLabels",
"type": "array"
},
"reply_to": {
"description": "Reply-to address or addresses.",
"oneOf": [
{
"type": "string"
},
{
"items": {
"type": "string"
},
"type": "array"
}
],
"title": "SendMessageReplyTo"
},
"subject": {
"description": "Subject of message.",
"title": "MessageSubject",
"type": "string"
},
"text": {
"description": "Plain text body of message.",
"title": "MessageText",
"type": "string"
},
"to": {
"description": "Recipient address or addresses.",
"oneOf": [
{
"type": "string"
},
{
"items": {
"type": "string"
},
"type": "array"
}
],
"title": "SendMessageTo"
},
"track_opens": {
"description": "Track when this message is first opened. Requires a custom domain with tracking enabled and\nan HTML body. Opens surface as the `opened` label on the message and as a `message.opened`\nevent. One pixel is injected per message, not per recipient, so a message with several\nrecipients fires once when any of them opens it, and the event does not identify which one.",
"title": "TrackOpens",
"type": "boolean"
}
},
"title": "SendMessageRequest",
"type": "object"
}
}
}
},
"x-aisa-status": "enabled",
"x-aisa-pricing": {
"cost_contract": "explicit_zero",
"customer_pricing": "fixed_success",
"default_request_estimate_usd": 0.012,
"estimate_source": "profile_seed",
"evidence_source": "request_snapshot"
},
"components": {
"securitySchemes": {
"bearerAuth": {
"scheme": "bearer",
"type": "http"
}
}
}
}
Cost and request rules
Published reference price: $0.012 USD per successful request. Account-specific pricing and final settlement may differ. Published reference values are not an account-specific quote or a settled charge. For endpoints supporting X-AISA-Cost-Mode: quote, obtain a free quote for your exact request before execution; reconcile the settled cost with response metadata and Usage Logs. USD amounts use 1,000,000 integer micro-USD per dollar.- Default request reference estimate (USD): 0.012
- Cost contract: explicit_zero
- Settlement evidence source: request_snapshot
Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Path Parameters
The ID of the inbox.
Body
application/json
Attachments to include in message.
Show child attributes
Show child attributes
BCC recipient address or addresses.
CC recipient address or addresses.
Headers to include in message.
Show child attributes
Show child attributes
HTML body of message.
Labels of message.
Reply-to address or addresses.
Subject of message.
Plain text body of message.
Recipient address or addresses.
Track when this message is first opened. Requires a custom domain with tracking enabled and
an HTML body. Opens surface as the opened label on the message and as a message.opened
event. One pixel is injected per message, not per recipient, so a message with several
recipients fires once when any of them opens it, and the event does not identify which one.