Register an MCP server

curl --request POST \
  --url https://api.smith.langchain.com/v1/deepagents/mcp-servers \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "name": "tavily",
  "url": "https://mcp.tavily.com/mcp/",
  "headers": [
    {
      "key": "Authorization",
      "value": "Bearer tvly-..."
    }
  ]
}
'

import requests

url = "https://api.smith.langchain.com/v1/deepagents/mcp-servers"

payload = {
    "name": "tavily",
    "url": "https://mcp.tavily.com/mcp/",
    "headers": [
        {
            "key": "Authorization",
            "value": "Bearer tvly-..."
        }
    ]
}
headers = {
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'tavily',
    url: 'https://mcp.tavily.com/mcp/',
    headers: [{key: 'Authorization', value: 'Bearer tvly-...'}]
  })
};

fetch('https://api.smith.langchain.com/v1/deepagents/mcp-servers', 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.smith.langchain.com/v1/deepagents/mcp-servers",
  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([
    'name' => 'tavily',
    'url' => 'https://mcp.tavily.com/mcp/',
    'headers' => [
        [
                'key' => 'Authorization',
                'value' => 'Bearer tvly-...'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($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.smith.langchain.com/v1/deepagents/mcp-servers"

	payload := strings.NewReader("{\n  \"name\": \"tavily\",\n  \"url\": \"https://mcp.tavily.com/mcp/\",\n  \"headers\": [\n    {\n      \"key\": \"Authorization\",\n      \"value\": \"Bearer tvly-...\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-Api-Key", "<api-key>")
	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.smith.langchain.com/v1/deepagents/mcp-servers")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"tavily\",\n  \"url\": \"https://mcp.tavily.com/mcp/\",\n  \"headers\": [\n    {\n      \"key\": \"Authorization\",\n      \"value\": \"Bearer tvly-...\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.smith.langchain.com/v1/deepagents/mcp-servers")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"tavily\",\n  \"url\": \"https://mcp.tavily.com/mcp/\",\n  \"headers\": [\n    {\n      \"key\": \"Authorization\",\n      \"value\": \"Bearer tvly-...\"\n    }\n  ]\n}"

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

{
  "id": "5b6f6a2b-2c95-4f0f-9c2b-7c3a3e4f8d11",
  "tenant_id": "33499cf9-4c02-49af-909d-b8f42e051eab",
  "name": "tavily",
  "url": "https://mcp.tavily.com/mcp/",
  "headers": [
    {
      "key": "Authorization",
      "value": "Bearer tvly-..."
    }
  ],
  "auth_type": "",
  "oauth_mode": "",
  "created_at": "2026-05-20T20:50:32.708302+00:00",
  "updated_at": "2026-05-20T20:50:32.708302+00:00",
  "mcp_vendor_id": null,
  "vendor_id": null,
  "external_system_id": null
}

POST

mcp-servers

curl --request POST \
  --url https://api.smith.langchain.com/v1/deepagents/mcp-servers \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "name": "tavily",
  "url": "https://mcp.tavily.com/mcp/",
  "headers": [
    {
      "key": "Authorization",
      "value": "Bearer tvly-..."
    }
  ]
}
'

import requests

url = "https://api.smith.langchain.com/v1/deepagents/mcp-servers"

payload = {
    "name": "tavily",
    "url": "https://mcp.tavily.com/mcp/",
    "headers": [
        {
            "key": "Authorization",
            "value": "Bearer tvly-..."
        }
    ]
}
headers = {
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'tavily',
    url: 'https://mcp.tavily.com/mcp/',
    headers: [{key: 'Authorization', value: 'Bearer tvly-...'}]
  })
};

fetch('https://api.smith.langchain.com/v1/deepagents/mcp-servers', 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.smith.langchain.com/v1/deepagents/mcp-servers",
  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([
    'name' => 'tavily',
    'url' => 'https://mcp.tavily.com/mcp/',
    'headers' => [
        [
                'key' => 'Authorization',
                'value' => 'Bearer tvly-...'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($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.smith.langchain.com/v1/deepagents/mcp-servers"

	payload := strings.NewReader("{\n  \"name\": \"tavily\",\n  \"url\": \"https://mcp.tavily.com/mcp/\",\n  \"headers\": [\n    {\n      \"key\": \"Authorization\",\n      \"value\": \"Bearer tvly-...\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-Api-Key", "<api-key>")
	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.smith.langchain.com/v1/deepagents/mcp-servers")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"tavily\",\n  \"url\": \"https://mcp.tavily.com/mcp/\",\n  \"headers\": [\n    {\n      \"key\": \"Authorization\",\n      \"value\": \"Bearer tvly-...\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.smith.langchain.com/v1/deepagents/mcp-servers")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"tavily\",\n  \"url\": \"https://mcp.tavily.com/mcp/\",\n  \"headers\": [\n    {\n      \"key\": \"Authorization\",\n      \"value\": \"Bearer tvly-...\"\n    }\n  ]\n}"

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

{
  "id": "5b6f6a2b-2c95-4f0f-9c2b-7c3a3e4f8d11",
  "tenant_id": "33499cf9-4c02-49af-909d-b8f42e051eab",
  "name": "tavily",
  "url": "https://mcp.tavily.com/mcp/",
  "headers": [
    {
      "key": "Authorization",
      "value": "Bearer tvly-..."
    }
  ],
  "auth_type": "",
  "oauth_mode": "",
  "created_at": "2026-05-20T20:50:32.708302+00:00",
  "updated_at": "2026-05-20T20:50:32.708302+00:00",
  "mcp_vendor_id": null,
  "vendor_id": null,
  "external_system_id": null
}

Authorizations

X-Api-Key

string

header

default:LANGSMITH_API_KEY

required

Body

application/json

name

string

required

Human-readable name for the MCP server.

url

string<uri>

required

MCP server URL. Must be a valid HTTPS endpoint.

headers

object[]

Credential headers attached to every invocation of this MCP server. Omitted from response bodies when the caller lacks invoke permission on the server.

Show child attributes

auth_type

string

Authentication scheme used by the MCP server. Defaults to no authentication.

oauth_provider_id

string<uuid> | null

Optional OAuth provider ID for legacy shared OAuth providers. Not applicable to Managed Deep Agents in private preview.

oauth_mode

enum<string>

OAuth mode. Managed Deep Agents only supports static headers credentials in private preview.

Available options:

legacy_shared_provider,

per_user_dynamic_client

vendor_id

string

Optional vendor identifier for catalog grouping.

external_system_id

string

Optional opaque external system identifier.

Response

MCP server registered.

string<uuid>

tenant_id

string<uuid>

name

string

url

string<uri>

headers

object[]

Credential headers attached to every invocation of this MCP server. Omitted from response bodies when the caller lacks invoke permission on the server.

Show child attributes

auth_type

string

oauth_provider_id

string<uuid> | null

oauth_mode

string

created_at

string<date-time>

updated_at

string<date-time>

mcp_vendor_id

string | null

vendor_id

string | null

external_system_id

string | null

can_invoke

boolean

Whether the caller has invoke permission on this server. Omitted when ambient permissions already imply invoke.

General

LangSmith Deployment

Releases

Authorizations

Body

Response