Add a custom connector
curl --request POST \
--url https://api.custral.com/v1/connectors \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"displayName": "Linear",
"serverUrl": "https://mcp.linear.app/mcp",
"description": "<string>",
"tokenHeader": "X-API-Key",
"oauthClientId": "<string>",
"oauthClientSecret": "<string>"
}
'import requests
url = "https://api.custral.com/v1/connectors"
payload = {
"displayName": "Linear",
"serverUrl": "https://mcp.linear.app/mcp",
"description": "<string>",
"tokenHeader": "X-API-Key",
"oauthClientId": "<string>",
"oauthClientSecret": "<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({
displayName: 'Linear',
serverUrl: 'https://mcp.linear.app/mcp',
description: '<string>',
tokenHeader: 'X-API-Key',
oauthClientId: '<string>',
oauthClientSecret: '<string>'
})
};
fetch('https://api.custral.com/v1/connectors', 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.custral.com/v1/connectors",
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([
'displayName' => 'Linear',
'serverUrl' => 'https://mcp.linear.app/mcp',
'description' => '<string>',
'tokenHeader' => 'X-API-Key',
'oauthClientId' => '<string>',
'oauthClientSecret' => '<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://api.custral.com/v1/connectors"
payload := strings.NewReader("{\n \"displayName\": \"Linear\",\n \"serverUrl\": \"https://mcp.linear.app/mcp\",\n \"description\": \"<string>\",\n \"tokenHeader\": \"X-API-Key\",\n \"oauthClientId\": \"<string>\",\n \"oauthClientSecret\": \"<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://api.custral.com/v1/connectors")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"displayName\": \"Linear\",\n \"serverUrl\": \"https://mcp.linear.app/mcp\",\n \"description\": \"<string>\",\n \"tokenHeader\": \"X-API-Key\",\n \"oauthClientId\": \"<string>\",\n \"oauthClientSecret\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.custral.com/v1/connectors")
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 \"displayName\": \"Linear\",\n \"serverUrl\": \"https://mcp.linear.app/mcp\",\n \"description\": \"<string>\",\n \"tokenHeader\": \"X-API-Key\",\n \"oauthClientId\": \"<string>\",\n \"oauthClientSecret\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"data": {
"id": "slack",
"name": "Slack",
"description": "<string>",
"custom": true,
"host": "<string>",
"authType": "oauth",
"connectionScope": "org",
"connected": true,
"status": "active",
"enabled": true,
"allowWrites": true
},
"reqId": "req_2a1f9c8e7b6d5"
}{
"error": {
"code": "invalid_api_key"
},
"reqId": "req_2a1f9c8e7b6d5"
}{
"error": {
"code": "insufficient_scope"
},
"reqId": "req_2a1f9c8e7b6d5"
}Connectors
Add a custom connector
Add the workspace’s own remote MCP server by URL. It is added, not connected — a member connects it in Settings → Connectors. Requires scope: connectors:manage, and a key created by a workspace admin.
POST
/
v1
/
connectors
Add a custom connector
curl --request POST \
--url https://api.custral.com/v1/connectors \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"displayName": "Linear",
"serverUrl": "https://mcp.linear.app/mcp",
"description": "<string>",
"tokenHeader": "X-API-Key",
"oauthClientId": "<string>",
"oauthClientSecret": "<string>"
}
'import requests
url = "https://api.custral.com/v1/connectors"
payload = {
"displayName": "Linear",
"serverUrl": "https://mcp.linear.app/mcp",
"description": "<string>",
"tokenHeader": "X-API-Key",
"oauthClientId": "<string>",
"oauthClientSecret": "<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({
displayName: 'Linear',
serverUrl: 'https://mcp.linear.app/mcp',
description: '<string>',
tokenHeader: 'X-API-Key',
oauthClientId: '<string>',
oauthClientSecret: '<string>'
})
};
fetch('https://api.custral.com/v1/connectors', 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.custral.com/v1/connectors",
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([
'displayName' => 'Linear',
'serverUrl' => 'https://mcp.linear.app/mcp',
'description' => '<string>',
'tokenHeader' => 'X-API-Key',
'oauthClientId' => '<string>',
'oauthClientSecret' => '<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://api.custral.com/v1/connectors"
payload := strings.NewReader("{\n \"displayName\": \"Linear\",\n \"serverUrl\": \"https://mcp.linear.app/mcp\",\n \"description\": \"<string>\",\n \"tokenHeader\": \"X-API-Key\",\n \"oauthClientId\": \"<string>\",\n \"oauthClientSecret\": \"<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://api.custral.com/v1/connectors")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"displayName\": \"Linear\",\n \"serverUrl\": \"https://mcp.linear.app/mcp\",\n \"description\": \"<string>\",\n \"tokenHeader\": \"X-API-Key\",\n \"oauthClientId\": \"<string>\",\n \"oauthClientSecret\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.custral.com/v1/connectors")
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 \"displayName\": \"Linear\",\n \"serverUrl\": \"https://mcp.linear.app/mcp\",\n \"description\": \"<string>\",\n \"tokenHeader\": \"X-API-Key\",\n \"oauthClientId\": \"<string>\",\n \"oauthClientSecret\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"data": {
"id": "slack",
"name": "Slack",
"description": "<string>",
"custom": true,
"host": "<string>",
"authType": "oauth",
"connectionScope": "org",
"connected": true,
"status": "active",
"enabled": true,
"allowWrites": true
},
"reqId": "req_2a1f9c8e7b6d5"
}{
"error": {
"code": "invalid_api_key"
},
"reqId": "req_2a1f9c8e7b6d5"
}{
"error": {
"code": "insufficient_scope"
},
"reqId": "req_2a1f9c8e7b6d5"
}Authorizations
A Custral secret API key (sk_…), created in Settings → Applications. Sent as Authorization: Bearer sk_…. The X-Api-Key: sk_… header is also accepted and takes precedence. Never expose a secret key in a browser.
Body
application/json
Maximum string length:
80Example:
"Linear"
The remote MCP server URL. https only; private and internal addresses are refused.
Example:
"https://mcp.linear.app/mcp"
Available options:
oauth, token, none Available options:
org, user Maximum string length:
280For token: the header the key goes in. Omitted = Authorization: Bearer.
Example:
"X-API-Key"
For oauth against a server without dynamic client registration.
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