curl --request POST \
--url https://app.goosybear.ai/api/v1/tools/ads.build_lookalike \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"source_audience_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"name": "<string>",
"country": "<string>",
"percent": 10,
"workspace": "<string>"
}
'import requests
url = "https://app.goosybear.ai/api/v1/tools/ads.build_lookalike"
payload = {
"source_audience_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"name": "<string>",
"country": "<string>",
"percent": 10,
"workspace": "<string>"
}
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({
source_audience_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
name: '<string>',
country: '<string>',
percent: 10,
workspace: '<string>'
})
};
fetch('https://app.goosybear.ai/api/v1/tools/ads.build_lookalike', 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://app.goosybear.ai/api/v1/tools/ads.build_lookalike",
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([
'source_audience_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
'name' => '<string>',
'country' => '<string>',
'percent' => 10,
'workspace' => '<string>'
]),
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://app.goosybear.ai/api/v1/tools/ads.build_lookalike"
payload := strings.NewReader("{\n \"source_audience_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"name\": \"<string>\",\n \"country\": \"<string>\",\n \"percent\": 10,\n \"workspace\": \"<string>\"\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://app.goosybear.ai/api/v1/tools/ads.build_lookalike")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"source_audience_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"name\": \"<string>\",\n \"country\": \"<string>\",\n \"percent\": 10,\n \"workspace\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://app.goosybear.ai/api/v1/tools/ads.build_lookalike")
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 \"source_audience_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"name\": \"<string>\",\n \"country\": \"<string>\",\n \"percent\": 10,\n \"workspace\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"ok": true,
"audience_count": 1,
"audiences": [
{
"id": "<string>",
"name": "<string>",
"kind": "customer_list",
"approximate_size": 1
}
],
"workspace": "<string>",
"working_in": {
"label": "<string>",
"note": "<string>",
"workspace": "<string>",
"source": "call-override"
}
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}Call ads.build_lookalike
Ask the ad platform to find people who resemble one of this brand’s audiences — ‘build a lookalike audience from our customers’, ‘find people like our best customers’. Ask the ad platform to build a new audience of people who resemble one of this brand’s customer lists. Nothing about the customers leaves us — the ad platform models from the audience it already holds. The new audience has no size until the platform finishes building it, so never state a size you were not given. Not for a new, empty customer audience — that is ads.build_audience.
Every result names the workspace it ran in. Say which workspace the answer is about. When the account has more than one workspace and none is selected, this tool refuses with workspace_ambiguous and lists the choices — offer them, never pick one.
curl --request POST \
--url https://app.goosybear.ai/api/v1/tools/ads.build_lookalike \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"source_audience_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"name": "<string>",
"country": "<string>",
"percent": 10,
"workspace": "<string>"
}
'import requests
url = "https://app.goosybear.ai/api/v1/tools/ads.build_lookalike"
payload = {
"source_audience_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"name": "<string>",
"country": "<string>",
"percent": 10,
"workspace": "<string>"
}
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({
source_audience_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
name: '<string>',
country: '<string>',
percent: 10,
workspace: '<string>'
})
};
fetch('https://app.goosybear.ai/api/v1/tools/ads.build_lookalike', 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://app.goosybear.ai/api/v1/tools/ads.build_lookalike",
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([
'source_audience_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
'name' => '<string>',
'country' => '<string>',
'percent' => 10,
'workspace' => '<string>'
]),
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://app.goosybear.ai/api/v1/tools/ads.build_lookalike"
payload := strings.NewReader("{\n \"source_audience_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"name\": \"<string>\",\n \"country\": \"<string>\",\n \"percent\": 10,\n \"workspace\": \"<string>\"\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://app.goosybear.ai/api/v1/tools/ads.build_lookalike")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"source_audience_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"name\": \"<string>\",\n \"country\": \"<string>\",\n \"percent\": 10,\n \"workspace\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://app.goosybear.ai/api/v1/tools/ads.build_lookalike")
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 \"source_audience_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n \"name\": \"<string>\",\n \"country\": \"<string>\",\n \"percent\": 10,\n \"workspace\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"ok": true,
"audience_count": 1,
"audiences": [
{
"id": "<string>",
"name": "<string>",
"kind": "customer_list",
"approximate_size": 1
}
],
"workspace": "<string>",
"working_in": {
"label": "<string>",
"note": "<string>",
"workspace": "<string>",
"source": "call-override"
}
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}{
"ok": false,
"code": "<string>",
"message": "<string>",
"error": {
"code": "<string>",
"message": "<string>",
"retry_after_seconds": 123
},
"retry_after_seconds": 123
}Authorizations
An API key minted at Settings › API & MCP. Send it as Authorization: Bearer <key>. A key carries its holder's own permissions, resolved on every call — revoking a membership closes the key's reach immediately. Keep it in an environment variable (GOOSY_API_KEY), never in a committed file.
Headers
Your own id for this request, echoed back and recorded on the audit trail. 1–128 characters from A–Z a–z 0–9 . _ : -, starting with a letter or digit; anything else is replaced by a generated id.
128Body
The audience's id, as listed on the audiences page.
What to call the new lookalike.
1Two-letter country code the lookalike is built within, e.g. US.
2How close a match, as a whole percent from 1 to 20. 1 is the closest and smallest; 20 is the broadest.
1 <= x <= 20Which workspace to run in — its slug. Omit to use your default. With more than one reachable workspace and no default, the call is refused and the choices are listed.
1Response
The call was admitted and dispatched. ok says whether the tool succeeded — a refusal the tool itself produced is still a 200, exactly as it is a successful JSON-RPC result over MCP.
- Option 1
- Option 2
The tool ran and answered.
x >= 0Show child attributes
Show child attributes
The slug of the workspace this call ran in.
Which workspace this call ran in, and how that was decided. Present on every workspace-scoped result.
Show child attributes
Show child attributes