Genealogy
Place a member in a binary or matrix tree
Requires a persisted company admin identity and members.manage (or users.update); droplet tokens are not supported. The company must be enabled for legged trees (legged_trees_not_enabled otherwise), and the tree must be binary or matrix: unilevel trees, including the default enrollment and sponsor trees, are seated from enrollment and refuse this request with unsupported_tree_kind. Name the slot with parent_node_id and leg, or send a rule with the parent_node_id its search starts from: first_empty, left and right are supported; inside, outside and balanced fail with rule_not_confirmed, enroller_preference with preference_not_available, and weak_leg and strong_leg with volume_not_available. Rule searches never place below a discarded member’s seat: first_empty skips it, and left or right stop above it (no_open_leg). The rule defer takes no parent and places the member in the tree’s holding tank, returning the held seat with held_until. The placing admin is recorded on the placement. The example uses illustrative IDs.
POST
/
api
/
company
/
v2026-10
/
genealogy
/
trees
/
{tree_id}
/
nodes
Place a member by the first empty leg
curl -X POST 'https://api.fluid.app/api/company/v2026-10/genealogy/trees/7096ad49-7117-53f6-8f7f-4805473d14c5/nodes' \
-H 'Authorization: Bearer <company-token>' \
-H 'Content-Type: application/json' \
--data \{\"node\":\{\"member_id\":\"019e5b8a-4c10-7000-8000-000000000002\",\"parent_node_id\":\"019e5b8a-4c10-7000-8000-000000000001\",\"rule\":\"first_empty\"\}\}import requests
url = "https://api.fluid.app/api/company/v2026-10/genealogy/trees/{tree_id}/nodes"
payload = { "node": {
"member_id": "019e5b8a-4c10-7000-8000-000000000002",
"parent_node_id": "019e5b8a-4c10-7000-8000-000000000001",
"rule": "first_empty",
"reason": "New enrollment"
} }
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({
node: {
member_id: '019e5b8a-4c10-7000-8000-000000000002',
parent_node_id: '019e5b8a-4c10-7000-8000-000000000001',
rule: 'first_empty',
reason: 'New enrollment'
}
})
};
fetch('https://api.fluid.app/api/company/v2026-10/genealogy/trees/{tree_id}/nodes', 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/genealogy/trees/{tree_id}/nodes",
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([
'node' => [
'member_id' => '019e5b8a-4c10-7000-8000-000000000002',
'parent_node_id' => '019e5b8a-4c10-7000-8000-000000000001',
'rule' => 'first_empty',
'reason' => 'New enrollment'
]
]),
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/genealogy/trees/{tree_id}/nodes"
payload := strings.NewReader("{\n \"node\": {\n \"member_id\": \"019e5b8a-4c10-7000-8000-000000000002\",\n \"parent_node_id\": \"019e5b8a-4c10-7000-8000-000000000001\",\n \"rule\": \"first_empty\",\n \"reason\": \"New enrollment\"\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/genealogy/trees/{tree_id}/nodes")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"node\": {\n \"member_id\": \"019e5b8a-4c10-7000-8000-000000000002\",\n \"parent_node_id\": \"019e5b8a-4c10-7000-8000-000000000001\",\n \"rule\": \"first_empty\",\n \"reason\": \"New enrollment\"\n }\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fluid.app/api/company/v2026-10/genealogy/trees/{tree_id}/nodes")
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 \"node\": {\n \"member_id\": \"019e5b8a-4c10-7000-8000-000000000002\",\n \"parent_node_id\": \"019e5b8a-4c10-7000-8000-000000000001\",\n \"rule\": \"first_empty\",\n \"reason\": \"New enrollment\"\n }\n}"
response = http.request(request)
puts response.read_body{
"status": 201,
"node": {
"id": "019e5b8a-4c10-7000-8000-000000000003",
"tree_id": "7096ad49-7117-53f6-8f7f-4805473d14c5",
"member_id": "019e5b8a-4c10-7000-8000-000000000002",
"parent_node_id": "019e5b8a-4c10-7000-8000-000000000001",
"leg": "left",
"position": 0,
"pinned": false,
"held_until": null
},
"meta": {
"request_uuid": null,
"timestamp": "2026-09-29T00:00:00Z"
}
}{
"message": "<string>",
"error": "<unknown>"
}{
"message": "<string>",
"error": "<unknown>"
}{
"status": 123,
"error": {
"message": "<string>",
"details": {}
},
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"status": 123,
"error": {
"message": "<string>",
"details": {}
},
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"status": 123,
"error": {
"message": "<string>",
"details": {}
},
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}Authorizations
Company admin or company service token, subject to developer permissions.
Path Parameters
Binary or matrix tree UUID in the authenticated company.
Body
application/json
The member to place and either the slot or a placement rule.
A member to place, and either the slot or a placement rule.
Show child attributes
Show child attributes
⌘I
Place a member by the first empty leg
curl -X POST 'https://api.fluid.app/api/company/v2026-10/genealogy/trees/7096ad49-7117-53f6-8f7f-4805473d14c5/nodes' \
-H 'Authorization: Bearer <company-token>' \
-H 'Content-Type: application/json' \
--data \{\"node\":\{\"member_id\":\"019e5b8a-4c10-7000-8000-000000000002\",\"parent_node_id\":\"019e5b8a-4c10-7000-8000-000000000001\",\"rule\":\"first_empty\"\}\}import requests
url = "https://api.fluid.app/api/company/v2026-10/genealogy/trees/{tree_id}/nodes"
payload = { "node": {
"member_id": "019e5b8a-4c10-7000-8000-000000000002",
"parent_node_id": "019e5b8a-4c10-7000-8000-000000000001",
"rule": "first_empty",
"reason": "New enrollment"
} }
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({
node: {
member_id: '019e5b8a-4c10-7000-8000-000000000002',
parent_node_id: '019e5b8a-4c10-7000-8000-000000000001',
rule: 'first_empty',
reason: 'New enrollment'
}
})
};
fetch('https://api.fluid.app/api/company/v2026-10/genealogy/trees/{tree_id}/nodes', 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/genealogy/trees/{tree_id}/nodes",
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([
'node' => [
'member_id' => '019e5b8a-4c10-7000-8000-000000000002',
'parent_node_id' => '019e5b8a-4c10-7000-8000-000000000001',
'rule' => 'first_empty',
'reason' => 'New enrollment'
]
]),
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/genealogy/trees/{tree_id}/nodes"
payload := strings.NewReader("{\n \"node\": {\n \"member_id\": \"019e5b8a-4c10-7000-8000-000000000002\",\n \"parent_node_id\": \"019e5b8a-4c10-7000-8000-000000000001\",\n \"rule\": \"first_empty\",\n \"reason\": \"New enrollment\"\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/genealogy/trees/{tree_id}/nodes")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"node\": {\n \"member_id\": \"019e5b8a-4c10-7000-8000-000000000002\",\n \"parent_node_id\": \"019e5b8a-4c10-7000-8000-000000000001\",\n \"rule\": \"first_empty\",\n \"reason\": \"New enrollment\"\n }\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.fluid.app/api/company/v2026-10/genealogy/trees/{tree_id}/nodes")
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 \"node\": {\n \"member_id\": \"019e5b8a-4c10-7000-8000-000000000002\",\n \"parent_node_id\": \"019e5b8a-4c10-7000-8000-000000000001\",\n \"rule\": \"first_empty\",\n \"reason\": \"New enrollment\"\n }\n}"
response = http.request(request)
puts response.read_body{
"status": 201,
"node": {
"id": "019e5b8a-4c10-7000-8000-000000000003",
"tree_id": "7096ad49-7117-53f6-8f7f-4805473d14c5",
"member_id": "019e5b8a-4c10-7000-8000-000000000002",
"parent_node_id": "019e5b8a-4c10-7000-8000-000000000001",
"leg": "left",
"position": 0,
"pinned": false,
"held_until": null
},
"meta": {
"request_uuid": null,
"timestamp": "2026-09-29T00:00:00Z"
}
}{
"message": "<string>",
"error": "<unknown>"
}{
"message": "<string>",
"error": "<unknown>"
}{
"status": 123,
"error": {
"message": "<string>",
"details": {}
},
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"status": 123,
"error": {
"message": "<string>",
"details": {}
},
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}{
"status": 123,
"error": {
"message": "<string>",
"details": {}
},
"meta": {
"request_uuid": "<string>",
"timestamp": "2023-11-07T05:31:56Z"
}
}