---
title: "Upload agent avatar"
method: PUT
path: "/agents/{agent_id}/avatar"
tags: ["Agents"]
---

# Upload agent avatar

`PUT /agents/{agent_id}/avatar`

## Request

- Base URL: `https://api.mnemom.ai/v1`
- URL: `https://api.mnemom.ai/v1/agents/{agent_id}/avatar`
- Auth: one of:
  - HTTP bearer
  - API key in header `X-Mnemom-Api-Key`

Replace an agent's avatar image. Requires the authenticated principal to be the agent's owner (`agents.user_id == auth.sub`). Old avatar is replaced; storage cleanup happens server-side.

## Path parameters

- `agent_id` string, required

## Response `200`

Avatar uploaded; persistent URL returned

- object
  - `avatar_url` string, uri, required: Public URL of the uploaded avatar (CDN-served).

## Other responses

- `400`: Bad request
- `401`: Authentication required
- `403`: Forbidden
- `404`: Resource not found
- `429`: Rate-limit exceeded. The global per-IP limiter (100 requests/minute, applied to every `/v1/*` route) rejected this request. Back off until the window resets — `Retry-After` carries the cooldown in seconds and `X-RateLimit-Reset` the absolute reset time.
- `500`: Server error — request was well-formed but the server failed to fulfill it. Typically a downstream dependency (DB / RPC / external API) returned an unexpected error.
- `502`: An upstream dependency returned an invalid response.

---

[API](https://skmtc.dev/mnemom/apis/mnemom-api.md) · [All operations](https://skmtc.dev/mnemom/apis/mnemom-api/llms.txt) · [OpenAPI document](https://skmtc.dev/mnemom/apis/mnemom-api/revisions/274b7a6ea182?raw)