---
title: "Create a new agent with name, voice, system prompt, and voice mode."
method: POST
path: "/agentphone/v1/agents"
tags: ["AgentPhone"]
---

# Create a new agent with name, voice, system prompt, and voice mode.

`POST /agentphone/v1/agents`

## Request

- Base URL: `https://api.orthogonal.com/mpp`
- URL: `https://api.orthogonal.com/mpp/agentphone/v1/agents`
- Auth: none declared
- TypeScript: <https://skmtc.dev/orthogonal/apis/orthogonal-api-marketplace/docs/agentphone/v1/agents/post.ts> (a function with typed inputs; its response is checked against the schema)

## Request body

- object
  - `name` string, required: Display name.
  - `voiceMode` string: hosted or webhook.
  - `systemPrompt` string: Agent instructions for hosted calls.
  - `beginMessage` string: First line on call connect.
  - `voice` string: Voice ID from GET /v1/agents/voices.
  - `modelTier` string: turbo, balanced, or max.
  - `transferNumber` string: E.164 number to transfer calls to.
  - `voicemailMessage` string: Voicemail message.

## Response `200`

Successful response

## Changes

- **2026-11-08** `857e915717f4`: 1 breaking
  - added required request body
- **2026-08-07** `a2f6a959fef9`: 1 info
  - removed the non-success response with the status `402`

[Operation history](https://skmtc.dev/orthogonal/apis/orthogonal-api-marketplace/changes/agentphone/v1/agents/post.md)

---

[API](https://skmtc.dev/orthogonal/apis/orthogonal-api-marketplace.md) - [All operations](https://skmtc.dev/orthogonal/apis/orthogonal-api-marketplace/llms.txt) - [OpenAPI document](https://skmtc.dev/orthogonal/apis/orthogonal-api-marketplace/revisions/fc2e1d26c8eb?raw)