Register an upstream MCP server

Registers a server for the gateway to proxy. The URL is validated against internal and loopback targets, and default_headers is checked against a blocklist, so a registration cannot be used to reach inside the network or forge platform headers. Registering does not discover tools — run a probe afterwards.

curl -X POST "https://mythic-analytics.gulp.workers.dev/builder/mcp/servers" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -d '{
  "name": "Internal research server",
  "url": "https://mcp.example.com/mcp",
  "default_headers": {
    "Authorization": "Bearer upstream-token"
  },
  "is_enabled": true
}'

import requests
import json

url = "https://mythic-analytics.gulp.workers.dev/builder/mcp/servers"
headers = {
  "Content-Type": "application/json",
  "Authorization": "Bearer YOUR_API_TOKEN"
}
data = {
  "name": "Internal research server",
  "url": "https://mcp.example.com/mcp",
  "default_headers": {
    "Authorization": "Bearer upstream-token"
  },
  "is_enabled": true
}

response = requests.post(url, headers=headers, json=data)
print(response.json())

const response = await fetch("https://mythic-analytics.gulp.workers.dev/builder/mcp/servers", {
  method: "POST",
  headers: {
  "Content-Type": "application/json",
  "Authorization": "Bearer YOUR_API_TOKEN"
},
  body: JSON.stringify({
  "name": "Internal research server",
  "url": "https://mcp.example.com/mcp",
  "default_headers": {
    "Authorization": "Bearer upstream-token"
  },
  "is_enabled": true
})
});

const data = await response.json();
console.log(data);

package main

import (
    "fmt"
    "net/http"
    "bytes"
    "encoding/json"
)

func main() {
    data := []byte(`{
  "name": "Internal research server",
  "url": "https://mcp.example.com/mcp",
  "default_headers": {
    "Authorization": "Bearer upstream-token"
  },
  "is_enabled": true
}`)

    req, err := http.NewRequest("POST", "https://mythic-analytics.gulp.workers.dev/builder/mcp/servers", bytes.NewBuffer(data))
    if err != nil {
        panic(err)
    }

    req.Header.Set("Content-Type", "application/json")
    req.Header.Set("Authorization", "Bearer YOUR_API_TOKEN")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    fmt.Println("Response Status:", resp.Status)
}

require 'net/http'
require 'json'

uri = URI('https://mythic-analytics.gulp.workers.dev/builder/mcp/servers')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true

request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request['Authorization'] = 'Bearer YOUR_API_TOKEN'
request.body = '{
  "name": "Internal research server",
  "url": "https://mcp.example.com/mcp",
  "default_headers": {
    "Authorization": "Bearer upstream-token"
  },
  "is_enabled": true
}'

response = http.request(request)
puts response.body

{
  "data": {
    "id": "123e4567-e89b-12d3-a456-426614174000",
    "name": "Internal research server",
    "url": "https://mcp.example.com/mcp",
    "is_enabled": true,
    "ownership": "agency",
    "tool_count": 12,
    "last_probed_at": "2024-12-25T10:00:00Z",
    "created_at": "2024-12-25T10:00:00Z",
    "updated_at": "2024-12-25T10:00:00Z"
  }
}

{
  "error": "Bad Request",
  "message": "The request contains invalid parameters or malformed data",
  "code": 400,
  "details": [
    {
      "field": "email",
      "message": "Invalid email format"
    }
  ]
}

POST

/builder/mcp/servers

POST

Base URLstring

Target server for requests. Edit to use your own host.

Bearer Token

Bearer Tokenstring

Required

An agency key (ak_). Location secret keys are rejected. Scoped keys (mcp_) are not accepted here (403 not_available_to_scoped_keys).

Content-Typestring

Required

The media type of the request body

Options: application/json

Public HTTPS endpoint of the upstream server.

Format: uri

default_headersobject

Headers sent on every proxied request, e.g. upstream auth.

is_enabledboolean

Request Preview

Response

Response will appear here after sending the request

Authentication

header

Authorizationstring

Required

Bearer token. An agency key (ak_). Location secret keys are rejected. Scoped keys (mcp_) are not accepted here (403 not_available_to_scoped_keys).