# StableEmail List Subdomain Inboxes

> StableEmail List Subdomain Inboxes is a free API for AI agents from StableEmail at stableemail.dev, callable via MPP, Free, status unknown (last checked 2026-10-10).

Lists all inboxes associated with a given StableEmail subdomain

## Facts

- Endpoint: POST https://stableemail.dev/api/subdomain/inbox/list?utm_source=zero.xyz
- Price: Free
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Provider: StableEmail
- Docs: https://stableemail.dev
- Website: https://stableemail.dev
- Tags: email, send, inbox, forwarding, subdomain, social
- Canonical page: https://www.zero.xyz/c/stableemail-list-e3ed32df
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x7ZRVBrhkvk4Eq2SCS3zc

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 stableemail-list-e3ed32df -d '<json body>'
```

Example prompt: Can you show me all the inboxes that exist on the 'mycompany' subdomain on StableEmail?

## When to prefer this

Use this endpoint when you need to discover or audit all inboxes configured under a specific StableEmail subdomain. Ideal for inbox management workflows, building dashboards, or checking what addresses are active before sending or forwarding operations. This is a free call so prefer it for discovery before paid operations.

## Known failure modes

- Invalid subdomain format (must match pattern ^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$ and no double hyphens) returns validation error
- Subdomain not found or not registered returns empty list or 404-style error
- Subdomain with consecutive hyphens rejected by pattern validation

## How this service works

List inboxes on a subdomain (free)

## Output

Returns a list of inboxes associated with the specified subdomain, including inbox identifiers and relevant metadata for each inbox configured under that subdomain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "subdomain"
 ],
 "properties": {
  "subdomain": {
   "type": "string",
   "allOf": [
    {
     "pattern": "^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$"
    },
    {
     "pattern": "^(?!.*--)"
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stableemail-list-e3ed32df/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stableemail.dev](https://www.zero.xyz/host/stableemail.dev/llms.txt)