---
title: "Replace an agent's Ed25519 key; prove it at /v1/agents/verify-key."
method: POST
path: "/v1/me/agents/{agent_id}/key"
tags: ["Agents"]
---

# Replace an agent's Ed25519 key; prove it at /v1/agents/verify-key.

`POST /v1/me/agents/{agent_id}/key`

## Request

- Base URL: `https://www.rightshold.com`
- URL: `https://www.rightshold.com/v1/me/agents/{agent_id}/key`
- Auth: HTTP bearer

## Path parameters

- `agent_id` string, required

## Headers

- `X-Request-Id` string

## Request body

- object: Fields seen in accepted requests; required ones are proven by tests (omitting each returns a 4xx naming it).
  - `public_key_pem` string, required

## Response `200`

OK

- object: Inferred from 3 recorded responses; required fields appeared in every one; additional properties may appear.
  - `agent_id` string, required
  - `key_id` string, required
  - `tier` string, required
  - `challenge` object, required
    - `payload` object, required
      - `challenge` string, required
      - `agent_id` string, required
      - `purpose` string, required
    - `sign_with` string, required

## Other responses

- `400`: Problem details: a stable error code, type URI, title, status and an explanation
- `401`: Problem details: a stable error code, type URI, title, status and an explanation
- `404`: Problem details: a stable error code, type URI, title, status and an explanation
- `405`: Problem details: a stable error code, type URI, title, status and an explanation
- `422`: Problem details: a stable error code, type URI, title, status and an explanation
- `429`: Request budget exhausted; retry after Retry-After seconds
- `500`: Problem details: a stable error code, type URI, title, status and an explanation
- `4XX`: {error, detail}

---

[API](https://skmtc.dev/rightshold/apis/rightshold-api.md) · [All operations](https://skmtc.dev/rightshold/apis/rightshold-api/llms.txt) · [OpenAPI document](https://skmtc.dev/rightshold/apis/rightshold-api/revisions/cfe84fdde1ca?raw)