---
title: "Link wallet via SIWE proof (verified self, re-auth)"
method: POST
path: "/api/v1/wallets/link"
tags: ["wallets"]
---

# Link wallet via SIWE proof (verified self, re-auth)

`POST /api/v1/wallets/link`

## Request

- Base URL: `https://amplerun-api.spiry.org`
- URL: `https://amplerun-api.spiry.org/api/v1/wallets/link`
- Auth: HTTP bearer

Binds chain/address to account; nonce consumed once. UNIQUE(chain_id,address) across accounts.

## Headers

- `Idempotency-Key` string, uuid, required

## Request body

- object
  - `chain_id` unknown, required
  - `address` string, required
  - `siwe_message` string, required
  - `signature` string, required

## Response `201`

Binding created.

- WalletBinding
  - `binding_id` string, uuid, required
  - `chain_id` unknown, required
  - `address` string, required
  - `version` string, required: Unsigned base-10 integer as string; never a float.
  - `linked_at` string, date-time, required
  - `unlinked_at` string, date-time, required

## Other responses

- `default`: Error envelope. 401 unauthenticated, 403/404 forbidden, 409 conflict, 422 invalid input, 429 rate limited (code UNAVAILABLE, retryable:true, no Retry-After header), 503 unavailable money/provider state with retryable:true.

---

[API](https://skmtc.dev/amplerun/apis/amplerun-business-api.md) · [All operations](https://skmtc.dev/amplerun/apis/amplerun-business-api/llms.txt) · [OpenAPI document](https://skmtc.dev/amplerun/apis/amplerun-business-api/revisions/40944687fa52?raw)