---
title: "Register a test.network subdomain"
method: POST
path: "/agent/dns/test-domains"
tags: ["DNS"]
---

# Register a test.network subdomain

`POST /agent/dns/test-domains`

## Request

- Base URL: `https://edge.network`
- URL: `https://edge.network/agent/dns/test-domains`
- Auth: HTTP bearer

Instant subdomain on test.network ($1/month) — useful for previews and demos. Billable: not available to unclaimed guest accounts.

## Headers

- `X-Dry-Run` 'true' | 'false'
- `Idempotency-Key` string

## Request body

- object
  - `subdomain` string, required: e.g. "my-project" → my-project.test.network.

## Response `201`

Success.

- TellUserEnvelope: Standard success envelope. Endpoint-specific fields ride alongside tell_user.
  - `tell_user` string, required: Human-readable summary of what happened, for the agent to relay to its operator.

## Other responses

- `400`: Validation error — the response body explains what to fix.
- `401`: Missing or invalid agent access code. The body includes self-signup pointers.
- `429`: Rate limited. Honour Retry-After and the RateLimit-* headers before retrying.

---

[API](https://skmtc.dev/edge/apis/edge-network-agent-api.md) · [All operations](https://skmtc.dev/edge/apis/edge-network-agent-api/llms.txt) · [OpenAPI document](https://skmtc.dev/edge/apis/edge-network-agent-api/revisions/49b5f2adf020?raw)