---
title: "Enroll an identity via one-time-token with a pre-exchanged client certificate"
method: POST
path: "/enroll/ottca"
tags: ["Enroll"]
---

# Enroll an identity via one-time-token with a pre-exchanged client certificate

`POST /enroll/ottca`

Enroll an identity via a one-time-token that also requires a pre-exchanged client certificate to match a
Certificate Authority that has been added and verified (See POST /cas and POST /cas{id}/verify). The client
must present a client certificate signed by CA associated with the enrollment. This enrollment is similar to
CA auto enrollment except that is required the identity to be pre-created.

As the client certificate has been pre-exchanged there is no CSR input to this enrollment method.

## Request body

- OttEnrollmentRequest
  - `clientCsr` string
  - `token` string

## Response `200`

Base empty response

- Empty
  - `data` object, required
  - `meta` Meta, required
    - `apiEnrollmentVersion` string
    - `apiVersion` string
    - `filterableFields` string[]
    - `pagination` Pagination
      - `limit` number, required
      - `offset` number, required
      - `totalCount` number, required

## Other responses

- `400` — The supplied request contains invalid fields or could not be parsed (json and non-json bodies). The error's code, message, and cause fields can be inspected for further information
- `429` — The resource requested is rate limited and the rate limit has been exceeded
- `503` — The request could not be completed due to the server being busy or in a temporarily bad state

---

[API](https://skmtc.net/openziti/apis/ziti-edge-client.md) · [All operations](https://skmtc.net/openziti/apis/ziti-edge-client/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/openziti/ziti-edge-client/versions/25da9a73a095/schema)