Nexmo Application API
Browse all Nexmo APIs★ Only Publicly Available OpenAPI DocumentCommunicationsVoice TelephonyapiKey5 EndpointsREST
For Agents
Manage legacy Vonage V1 applications — list, create, update, and delete the application objects that route voice calls and webhook events.
Use for: List my Vonage applications, Create a new Vonage application for voice, Get the webhook configuration for application id abc, Update the answer_url on a Vonage application
Not supported: Does not place calls, send SMS, provision numbers, or generate JWTs — use for Vonage V1 application object lifecycle only.
The Vonage Application API V1 (application) provides CRUD operations for Vonage Applications, the container resource that binds voice answer URLs, event callback URLs, and assigned virtual numbers. This V1 surface is deprecated by Vonage in favour of v2 at /v2/applications, but remains useful for inventory and migration. The 5 endpoints cover list, create, retrieve, update, and delete on the application resource.
Install Jentic One Beta
Connect the Nexmo Application API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Nexmo Application API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Nexmo Application API.
List all Vonage applications registered against an account for inventory and audit
Create a new Vonage application that bundles voice answer and event webhook URLs
Retrieve a single application's webhook configuration before routing inbound calls
Update an existing application's voice or event callback URLs without recreating it
Delete a deprecated application once its virtual numbers have been migrated off
Use Cases
Patterns agents use Nexmo Application API for, with concrete tasks.
★ Inventory existing applications before v2 migration
Vonage Applications V1 is deprecated and v2 is the supported version. Before migrating, an operator needs a full list of v1 applications and their webhook URLs to plan recreation in v2. GET / returns paginated applications with answer_url, event_url, and assigned numbers, allowing a migration script to replay them against the v2 endpoint. Effort is roughly half a day including webhook validation.
Call GET / to enumerate all v1 applications and write each one's name, answer_url, and event_url to a migration manifest.
Update webhook URL after a backend redeploy
When the answer or event handler is redeployed at a new URL, every affected Vonage application needs its callback URLs updated. PUT /{app_id} accepts new answer_url and event_url values without disturbing the application's private key or assigned numbers. A small script can sweep all affected app_ids in minutes.
PUT /{app_id} for each impacted application_id, replacing answer_url with https://api.example.com/voice/answer.
Decommission deprecated v1 application
Once a v1 application has been replaced by a v2 equivalent and no numbers remain assigned, it should be deleted to keep the inventory clean. DELETE /{app_id} removes the application; numbers must be unassigned first via the Numbers API. A few minutes per application.
DELETE /{app_id} on the legacy v1 application after confirming no numbers are still bound.
Agent-driven application provisioning
An AI agent provisioning a new tenant needs to create a Vonage application with the correct webhook URLs. Through Jentic, the agent searches for 'create a vonage application', loads the POST / schema, and executes with the tenant-specific URLs. Credentials stay in the Jentic vault.
Search Jentic for 'create a vonage application', load schema, and POST / with name, answer_url, and event_url for the new tenant.
Key Endpoints
5 endpoints — the vonage application api v1 (application) provides crud operations for vonage applications, the container resource that binds voice answer urls, event callback urls, and assigned virtual numbers.
METHOD
PATH
DESCRIPTION
GET
/
List all applications
POST
/
Create an application
GET
/{app_id}
Retrieve an application
PUT
/{app_id}
Update an application
DELETE
/{app_id}
Delete an application
GET
/
List all applications
POST
/
Create an application
GET
/{app_id}
Retrieve an application
PUT
/{app_id}
Update an application
DELETE
/{app_id}
Delete an application
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
This Vonage API version does not declare an auth scheme in the OpenAPI spec. In production, Vonage requires API key and secret in query parameters or Basic auth headers. Jentic stores both in the encrypted MAXsystem vault and injects them at call time.
Intent-based discovery
Agents search by intent (e.g. 'list Vonage applications') and Jentic returns the matching operation with its input schema, so the agent calls the right endpoint directly.
Time to first call
Direct integration: 1-2 days. Through Jentic: under 30 minutes — search, load schema, execute.
Related APIs
Alternatives and complements available in the Jentic catalogue.
FAQs
Specific to using Nexmo Application API through Jentic.
What authentication does the Vonage Application API V1 use?
The OpenAPI spec for Applications V1 does not declare an auth scheme, but in production Vonage requires the API key and secret as query parameters. Jentic stores both in the encrypted MAXsystem vault and appends them at call time.
Should I use the Vonage Application API V1 or the v2 Application API?
Vonage marks Applications V1 as deprecated and recommends the v2 Application API at /v2/applications. Use v1 only to inventory or decommission existing applications; create new applications on v2.
What are the rate limits for the Vonage Application API V1?
Application management is a low-frequency control-plane operation. Vonage does not publish a documented per-second cap for these endpoints in the spec; treat list operations as eventually consistent and avoid tight polling loops.
How do I list applications through Jentic with the Vonage Application API V1?
Install the SDK with pip install jentic, search Jentic for 'list vonage applications', load the GET / schema, and execute. Jentic injects the API key and secret from the vault at call time.
Can I update an application's answer_url with the Vonage Application API V1?
Yes. PUT /{app_id} accepts new answer_url and event_url values; the application's private key and number assignments are preserved. Sign up at https://app.jentic.com/sign-up to manage Vonage Applications via Jentic.
GET STARTED