# AgentMail List Inboxes

> AgentMail List Inboxes is a free API for AI agents from AgentMail at mpp.api.agentmail.to, callable via MPP, Free, status unknown (last checked 2026-10-11, last successful call 2026-05-12).

Retrieves a paginated list of all email inboxes associated with the authenticated account, including inbox IDs, pod IDs, display names, and timestamps.

## Facts

- Endpoint: GET https://mpp.api.agentmail.to/v0/inboxes?utm_source=zero.xyz
- Price: Free
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-11
- Last successful call: 2026-05-12
- Success rate: 50% of calls made through Zero
- Activations on Zero: 2
- Provider: AgentMail
- Docs: https://docs.agentmail.to
- Website: https://agentmail.to
- Tags: email, inboxes, domains, drafts, threads, webhooks, messaging, ai, social
- Canonical page: https://www.zero.xyz/c/agentmail-inboxes-09b9d956
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_57Kz5knPH55PC19dRMs5b

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentmail-inboxes-09b9d956
```

Example prompt: Show me all the AgentMail inboxes in my account — list up to 20, sorted oldest first.

## When to prefer this

Use this endpoint when you need to discover or enumerate all email inboxes provisioned under an AgentMail account — for example, before reading threads, managing drafts, or routing messages to a specific inbox. Prefer this over brand-level metadata calls when you need actual inbox IDs and display names for downstream operations.

## Known failure modes

- 401 Unauthorized if Authorization Bearer token is missing or invalid
- Empty inboxes array if no inboxes have been created yet
- Malformed page_token causing pagination errors
- Rate limiting or server errors returning 429 or 5xx responses

## How this service works

List Inboxes

## Output

Returns a JSON object containing a count of inboxes returned, an array of inbox objects (each with inbox_id, pod_id, optional client_id, display_name, created_at, updated_at), and an optional next_page_token for fetching additional pages.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "title": "Limit",
   "description": "Limit of number of items returned."
  },
  "ascending": {
   "type": "boolean",
   "title": "Ascending",
   "description": "Sort in ascending temporal order."
  },
  "page_token": {
   "type": "string",
   "title": "PageToken",
   "description": "Page token for pagination."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "title": "ListInboxesResponse",
 "required": [
  "count",
  "inboxes"
 ],
 "properties": {
  "count": {
   "type": "integer",
   "title": "Count",
   "description": "Number of items returned."
  },
  "limit": {
   "type": "integer",
   "title": "Limit",
   "description": "Limit of number of items returned."
  },
  "inboxes": {
   "type": "array",
   "items": {
    "type": "object",
    "title": "Inbox",
    "required": [
     "pod_id",
     "inbox_id",
     "updated_at",
     "created_at"
    ],
    "properties": {
     "pod_id": {
      "type": "string",
      "title": "PodId",
      "description": "ID of pod."
     },
     "inbox_id": {
      "type": "string",
      "title": "InboxId",
      "description": "The ID of the inbox."
     },
     "client_id": {
      "type": "string",
      "title": "ClientId",
      "description": "Client ID of inbox."
     },
     "created_at": {
      "type": "string",
      "format": "date-time",
      "description": "Time at which inbox was created."
     },
     "updated_at": {
      "type": "string",
      "format": "date-time",
      "description": "Time at which inbox was last updated."
     },
     "display_name": {
      "type": "string",
      "title": "DisplayName",
      "description": "Display name: `Display Name <username@domain.com>`."
     }
    }
   },
   "description": "Ordered by `created_at` descending."
  },
  "next_page_token": {
   "type": "string",
   "title": "PageToken",
   "description": "Page token for pagination."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentmail-inboxes-09b9d956/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mpp.api.agentmail.to](https://www.zero.xyz/host/mpp.api.agentmail.to/llms.txt)