---
title: "Create a new authorisation"
method: POST
path: "/agents/{arn}/invitations"
tags: ["Agents"]
---

# Create a new authorisation

`POST /agents/{arn}/invitations`

Create a new authorisation request. The request will expire after 21 days.

## Path parameters

- `arn` string, required

## Headers

- `Accept` 'application/vnd.hmrc.2.0+json', required
- `Content-Type` 'application/json', required

## Request body

- union
  - object
    - `service` string, required — MTD IT service
    - `clientType` string, required — An individual or sole trader
    - `clientIdType` string, required
    - `clientId` string, required
    - `knownFact` string, required
    - `agentType` 'main' | 'supporting', nullable — Only MTD-IT supports this field. Defaults to "main" if omitted.
  - object
    - `service` string, required — MTD VAT service
    - `clientType` union, required
      - string — An individual or sole trader
      - string — A company or partnership
    - `clientIdType` string, required
    - `clientId` string, required
    - `knownFact` string, required

## Response `204`

The request was accepted and an authorisation request has been created

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `406` — Not Acceptable
- `500` — Internal Server Error

---

[API](https://skmtc.dev/hmrc/apis/agent-authorisation-api.md) · [All operations](https://skmtc.dev/hmrc/apis/agent-authorisation-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/hmrc/agent-authorisation-api/revisions/83e8a60b1144/schema)