Outbound messages
Send a Flow direct message
A Flow direct message to a member. Who it comes from: a person’s token sends as that person; bot_id sends as a We-Bot; send_as sends as a person who let your app do so; an app token with neither sends as the app’s own sender, created on its first send. Needs outbound_messages.flow.
POST
/
api
/
company
/
v2026-10
/
messages
/
flow
Send a Flow direct message
curl --request POST \
--url https://api.fluid.app/api/company/v2026-10/messages/flow \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"member_id": "0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58",
"text": "Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.",
"send_as": {
"admin_id": "0199b7e2-41c5-7a03-8d6f-3e9a12c4b580"
}
}
'import requests
url = "https://api.fluid.app/api/company/v2026-10/messages/flow"
payload = {
"member_id": "0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58",
"text": "Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.",
"send_as": { "admin_id": "0199b7e2-41c5-7a03-8d6f-3e9a12c4b580" }
}
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({
member_id: '0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58',
text: 'Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.',
send_as: {admin_id: '0199b7e2-41c5-7a03-8d6f-3e9a12c4b580'}
})
};
fetch('https://api.fluid.app/api/company/v2026-10/messages/flow', 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.fluid.app/api/company/v2026-10/messages/flow",
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([
'member_id' => '0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58',
'text' => 'Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.',
'send_as' => [
'admin_id' => '0199b7e2-41c5-7a03-8d6f-3e9a12c4b580'
]
]),
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.fluid.app/api/company/v2026-10/messages/flow"
payload := strings.NewReader("{\n \"member_id\": \"0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58\",\n \"text\": \"Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.\",\n \"send_as\": {\n \"admin_id\": \"0199b7e2-41c5-7a03-8d6f-3e9a12c4b580\"\n }\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.fluid.app/api/company/v2026-10/messages/flow")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"member_id\": \"0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58\",\n \"text\": \"Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.\",\n \"send_as\": {\n \"admin_id\": \"0199b7e2-41c5-7a03-8d6f-3e9a12c4b580\"\n }\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fluid.app/api/company/v2026-10/messages/flow")
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 \"member_id\": \"0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58\",\n \"text\": \"Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.\",\n \"send_as\": {\n \"admin_id\": \"0199b7e2-41c5-7a03-8d6f-3e9a12c4b580\"\n }\n}"
response = http.request(request)
puts response.read_body{
"message": {
"id": "019a1160-1b2c-7d3e-8f4a-5b6c7d8e9f0a",
"channel": "flow",
"message_type": "transactional",
"status": "delivered",
"refusal_code": null,
"provider": "flow",
"provider_message_id": null,
"recipient": {
"member_id": "0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58",
"contact_id": null,
"contact_method_id": null
},
"conversation_id": "418223",
"created_at": "2026-10-23T14:12:48Z",
"updated_at": "2026-10-23T14:12:48Z",
"events": [
{
"status": "accepted",
"detail": null,
"occurred_at": "2026-10-23T14:12:48Z"
},
{
"status": "delivered",
"detail": null,
"occurred_at": "2026-10-23T14:12:48Z"
}
],
"send_at": null
},
"status": 200,
"meta": {
"request_uuid": "3b8f1d27-6c4e-4a91-8e5d-2f7c9a1b0e64",
"timestamp": "2026-10-23T14:05:12Z"
}
}Authorizations
An admin session, company API token, droplet token or bot token.
Headers
Use this or idempotency_key in the body.
Body
application/json
A Flow direct message to a member. With a person's token it comes from that person; with bot_id, from one of the company's We-Bots; with send_as, from a person who let your app send as them; and with an app token and neither, from your app's own sender, which shows your app's name and icon and an App badge.
A member's uuid.
Required string length:
1 - 10000marketing needs the recipient's marketing consent for the channel.
Available options:
transactional, marketing A key you choose. Sending again with the same key answers with the first message instead of sending twice. You can send it as the Idempotency-Key header instead.
Maximum string length:
200Send as one of the company's We-Bots. Allowed for the bot's owner, its stewards, a company admin, or the bot's own run; anyone else gets 403 bot_not_authorized.
Send as a person: exactly one of member_id or admin_id. An app needs that person's send delegation (POST /messaging/send-delegations, granted by the person themself) covering the message type, or the request is refused with 403 sender_not_authorized; Fluid never falls back to the app's own sender. A person may only name themself. The message shows sent_via with your app's name and icon.
Show child attributes
Show child attributes
A marketing message asked for during the recipient's quiet hours (21:00 to 08:00 in their time zone by default) waits and goes out when they end. Pass true to have it refused as quiet_hours with send_at instead.
Response
A repeat of an earlier request with the same idempotency key; the first message is returned and nothing is sent again.
⌘I
Send a Flow direct message
curl --request POST \
--url https://api.fluid.app/api/company/v2026-10/messages/flow \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"member_id": "0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58",
"text": "Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.",
"send_as": {
"admin_id": "0199b7e2-41c5-7a03-8d6f-3e9a12c4b580"
}
}
'import requests
url = "https://api.fluid.app/api/company/v2026-10/messages/flow"
payload = {
"member_id": "0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58",
"text": "Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.",
"send_as": { "admin_id": "0199b7e2-41c5-7a03-8d6f-3e9a12c4b580" }
}
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({
member_id: '0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58',
text: 'Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.',
send_as: {admin_id: '0199b7e2-41c5-7a03-8d6f-3e9a12c4b580'}
})
};
fetch('https://api.fluid.app/api/company/v2026-10/messages/flow', 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.fluid.app/api/company/v2026-10/messages/flow",
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([
'member_id' => '0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58',
'text' => 'Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.',
'send_as' => [
'admin_id' => '0199b7e2-41c5-7a03-8d6f-3e9a12c4b580'
]
]),
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.fluid.app/api/company/v2026-10/messages/flow"
payload := strings.NewReader("{\n \"member_id\": \"0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58\",\n \"text\": \"Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.\",\n \"send_as\": {\n \"admin_id\": \"0199b7e2-41c5-7a03-8d6f-3e9a12c4b580\"\n }\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.fluid.app/api/company/v2026-10/messages/flow")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"member_id\": \"0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58\",\n \"text\": \"Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.\",\n \"send_as\": {\n \"admin_id\": \"0199b7e2-41c5-7a03-8d6f-3e9a12c4b580\"\n }\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fluid.app/api/company/v2026-10/messages/flow")
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 \"member_id\": \"0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58\",\n \"text\": \"Hi Jordan, your order 104882 shipped today. Reply here if anything looks wrong.\",\n \"send_as\": {\n \"admin_id\": \"0199b7e2-41c5-7a03-8d6f-3e9a12c4b580\"\n }\n}"
response = http.request(request)
puts response.read_body{
"message": {
"id": "019a1160-1b2c-7d3e-8f4a-5b6c7d8e9f0a",
"channel": "flow",
"message_type": "transactional",
"status": "delivered",
"refusal_code": null,
"provider": "flow",
"provider_message_id": null,
"recipient": {
"member_id": "0199c2d4-8a1e-7b35-9f02-6d4e1a7c3b58",
"contact_id": null,
"contact_method_id": null
},
"conversation_id": "418223",
"created_at": "2026-10-23T14:12:48Z",
"updated_at": "2026-10-23T14:12:48Z",
"events": [
{
"status": "accepted",
"detail": null,
"occurred_at": "2026-10-23T14:12:48Z"
},
{
"status": "delivered",
"detail": null,
"occurred_at": "2026-10-23T14:12:48Z"
}
],
"send_at": null
},
"status": 200,
"meta": {
"request_uuid": "3b8f1d27-6c4e-4a91-8e5d-2f7c9a1b0e64",
"timestamp": "2026-10-23T14:05:12Z"
}
}