---
title: "Signup Check"
method: POST
path: "/signup/check"
tags: ["public"]
---

# Signup Check

`POST /signup/check`

## Request

- Base URL: `https://www.tandem-cc.com` (the document declares no server; this is the origin it was published from)
- URL: `https://www.tandem-cc.com/signup/check`
- Auth: none declared

Pre-flight: is ``handle`` valid and available?

The signup page calls this as the user types. Same shape as
``/v1/handles/check`` but gated on the page password instead of a
magic-link token. Does NOT claim the handle.

Body:
    {"password": "...", "handle": "leslie"}

Returns:
    {"available": true,  "handle": "leslie", "full": "leslie@tandem-cc.com"}
    — or —
    {"available": false, "handle": "leslie", "suggestions": ["leslie2"]}

## Request body

- object

## Response `200`

Successful Response

- object

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/tandem-cc/apis/tandem-api.md) · [All operations](https://skmtc.dev/tandem-cc/apis/tandem-api/llms.txt) · [OpenAPI document](https://skmtc.dev/tandem-cc/apis/tandem-api/revisions/3b804877b47c?raw)