Add an API

POST

agent_gateways

{instance_id}

apis

JavaScript

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const AgentGatewayApi = await client.agentGateways.apis.create('instance_id', {
  name: 'name',
  spec_url: 'spec_url',
});

console.log(AgentGatewayApi.data);

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),  # This is the default and can be omitted
)
agent_gateway_api = client.agent_gateways.apis.create(
    instance_id="instance_id",
    name="name",
    spec_url="spec_url",
)
print(agent_gateway_api.data)

package main

import (
	"context"
	"fmt"

	"github.com/team-telnyx/telnyx-go"
	"github.com/team-telnyx/telnyx-go/option"
)

func main() {
	client := telnyx.NewClient(
		option.WithAPIKey("My API Key"),
	)
	aPI, err := client.AgentGateways.Apis.New(
		context.TODO(),
		"instance_id",
		telnyx.AgentGatewayAPINewParams{
			Name:    "name",
			SpecURL: "spec_url",
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", aPI.Data)
}

package com.telnyx.sdk.example;

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
import com.telnyx.sdk.models.agentGateways.apis.ApiCreateParams;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        TelnyxClient client = TelnyxOkHttpClient.fromEnv();

        ApiCreateParams params = ApiCreateParams.builder()
            .name("name")
            .specUrl("spec_url")
            .build();
        var response = client.agentGateways().apis().create("instance_id", params);
    }
}

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Telnyx\Client;
use Telnyx\Core\Exceptions\APIException;

$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');

try {
  $agent_gateway_api = $client->agentGateways->apis->create(
    'instance_id',
    name: 'name',
    spec_url: 'spec_url',
  );

  var_dump($agent_gateway_api);
} catch (APIException $e) {
  echo $e->getMessage();
}

curl --request POST \
  --url https://api.telnyx.com/v2/agent_gateways/{instance_id}/apis \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "petstore",
  "spec_url": "https://petstore3.swagger.io/api/v3/openapi.json",
  "base_url": "https://petstore3.swagger.io/api/v3",
  "open_to_every_key": true
}
'

{
  "data": {
    "id": "dbe53cc0-bf7e-4f7a-8d84-752d19890eb3",
    "name": "petstore",
    "spec_url": "https://petstore3.swagger.io/api/v3/openapi.json",
    "base_url": "https://petstore3.swagger.io/api/v3",
    "auth": {
      "type": "none"
    },
    "tools": [],
    "static_headers": {},
    "forwarded_headers": [],
    "open_to_every_key": true,
    "created_at": "2026-10-28T17:07:27.083000Z",
    "updated_at": "2026-10-28T17:07:27.083000Z"
  }
}

{
  "errors": [
    {
      "code": "10012",
      "title": "Duplicate resource",
      "detail": "Resource is a duplicate.",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10012"
      },
      "source": {
        "pointer": "/name"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10009",
      "title": "Authentication failed",
      "detail": "The required authentication headers were either invalid or not included in the request.",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10009"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10005",
      "title": "Resource not found",
      "detail": "The requested resource or URL could not be found.",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10005"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "99901",
      "title": "Instance not ready",
      "detail": "The instance is not ready; its engine is not running."
    }
  ]
}

{
  "errors": [
    {
      "code": "10032",
      "title": "Invalid enumerated value",
      "detail": "Input tag does not match any of the expected tags: 'none', 'api_key', 'bearer_token', 'basic', 'token', 'authorization', 'oauth_client_credentials', 'passthrough'",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10032"
      },
      "source": {
        "pointer": "/auth"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "99903",
      "title": "Engine unavailable",
      "detail": "The instance's engine did not answer; try again shortly."
    }
  ]
}

Authorizations

Authorization

string

header

required

Telnyx API key

Path Parameters

instance_id

string<uuid>

required

The Agent Gateway's id.

Body

application/json

name

string

required

A name for the API, unique on the instance across MCP servers and APIs, regardless of case. Up to 100 letters, digits, _, and .. The gateway prefixes the API's tools with it and a hyphen.

Pattern: ^[A-Za-z0-9_.]{1,100}$

spec_url

string

required

The URL of the API's OpenAPI description: OpenAPI 3.0, OpenAPI 3.1, or Swagger 2.0.

base_url

string | null

Where the gateway sends the API's requests. Without it, the gateway takes the description's first servers entry.

auth

No authentication · object

How the gateway authenticates to the API. AWS Signature Version 4 is for MCP servers only. Replaced whole on an update.

No authentication
API key
OAuth client credentials
Token passthrough

Show child attributes

tools

string[]

The operations the API exposes as tools, by tool name. [] exposes every operation.

static_headers

object

Headers sent on every request.

Show child attributes

forwarded_headers

string[]

Headers copied from the agent's request, by name.

Maximum array length: 32

open_to_every_key

boolean

default:false

true lets every key on the instance use the server, granted or not.

Response

The added API

data

object

required

Show child attributes

JavaScript

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const AgentGatewayApi = await client.agentGateways.apis.create('instance_id', {
  name: 'name',
  spec_url: 'spec_url',
});

console.log(AgentGatewayApi.data);

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),  # This is the default and can be omitted
)
agent_gateway_api = client.agent_gateways.apis.create(
    instance_id="instance_id",
    name="name",
    spec_url="spec_url",
)
print(agent_gateway_api.data)

package main

import (
	"context"
	"fmt"

	"github.com/team-telnyx/telnyx-go"
	"github.com/team-telnyx/telnyx-go/option"
)

func main() {
	client := telnyx.NewClient(
		option.WithAPIKey("My API Key"),
	)
	aPI, err := client.AgentGateways.Apis.New(
		context.TODO(),
		"instance_id",
		telnyx.AgentGatewayAPINewParams{
			Name:    "name",
			SpecURL: "spec_url",
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", aPI.Data)
}

package com.telnyx.sdk.example;

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
import com.telnyx.sdk.models.agentGateways.apis.ApiCreateParams;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        TelnyxClient client = TelnyxOkHttpClient.fromEnv();

        ApiCreateParams params = ApiCreateParams.builder()
            .name("name")
            .specUrl("spec_url")
            .build();
        var response = client.agentGateways().apis().create("instance_id", params);
    }
}

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Telnyx\Client;
use Telnyx\Core\Exceptions\APIException;

$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');

try {
  $agent_gateway_api = $client->agentGateways->apis->create(
    'instance_id',
    name: 'name',
    spec_url: 'spec_url',
  );

  var_dump($agent_gateway_api);
} catch (APIException $e) {
  echo $e->getMessage();
}

curl --request POST \
  --url https://api.telnyx.com/v2/agent_gateways/{instance_id}/apis \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "petstore",
  "spec_url": "https://petstore3.swagger.io/api/v3/openapi.json",
  "base_url": "https://petstore3.swagger.io/api/v3",
  "open_to_every_key": true
}
'

{
  "data": {
    "id": "dbe53cc0-bf7e-4f7a-8d84-752d19890eb3",
    "name": "petstore",
    "spec_url": "https://petstore3.swagger.io/api/v3/openapi.json",
    "base_url": "https://petstore3.swagger.io/api/v3",
    "auth": {
      "type": "none"
    },
    "tools": [],
    "static_headers": {},
    "forwarded_headers": [],
    "open_to_every_key": true,
    "created_at": "2026-10-28T17:07:27.083000Z",
    "updated_at": "2026-10-28T17:07:27.083000Z"
  }
}

{
  "errors": [
    {
      "code": "10012",
      "title": "Duplicate resource",
      "detail": "Resource is a duplicate.",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10012"
      },
      "source": {
        "pointer": "/name"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10009",
      "title": "Authentication failed",
      "detail": "The required authentication headers were either invalid or not included in the request.",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10009"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "10005",
      "title": "Resource not found",
      "detail": "The requested resource or URL could not be found.",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10005"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "99901",
      "title": "Instance not ready",
      "detail": "The instance is not ready; its engine is not running."
    }
  ]
}

{
  "errors": [
    {
      "code": "10032",
      "title": "Invalid enumerated value",
      "detail": "Input tag does not match any of the expected tags: 'none', 'api_key', 'bearer_token', 'basic', 'token', 'authorization', 'oauth_client_credentials', 'passthrough'",
      "meta": {
        "url": "https://developers.telnyx.com/docs/overview/errors/10032"
      },
      "source": {
        "pointer": "/auth"
      }
    }
  ]
}

{
  "errors": [
    {
      "code": "99903",
      "title": "Engine unavailable",
      "detail": "The instance's engine did not answer; try again shortly."
    }
  ]
}

Get Started

Targets

Virtual Private Cloud

Outbound Authentication

Inbound Authentication

Authorization and Policy

Traffic Control

Audit and Observability

API Reference

For AI Agents

Authorizations

Path Parameters

Body

Response