---
title: "Get SIWE nonce"
method: POST
path: "/v1/auth/siwe/nonce"
tags: ["Auth"]
---

# Get SIWE nonce

`POST /v1/auth/siwe/nonce`

Request a nonce for Sign-In with Ethereum (SIWE) authentication.

## Response `200`

SIWE nonce

- SiweNonceResponse
  - `nonce` string, required

## Other responses

- `429` — Rate limit exceeded. Includes Retry-After header with seconds until reset.
- `500` — Internal server error
- `503` — Swap service unavailable
- `504` — Swap service timed out

---

[API](https://skmtc.net/shapeshift/apis/shapeshift-public-api.md) · [All operations](https://skmtc.net/shapeshift/apis/shapeshift-public-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/shapeshift/shapeshift-public-api/revisions/6ffb6a8fd74a/schema)