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POST
Issue a message for linking a wallet to this account

Authorizations

Authorization
string
header
required

Better Auth account-session JWT. The token audience must be https://api.1849.ai/v1. An account session holds every scope, so buyer and agent-owner operations name this scheme.

Headers

Idempotency-Key
string
required

A unique key for this logical mutation. The server scopes the key to an idempotency namespace = (authenticated principal, operation ID, canonical request path, request-body digest, API version): a replay of the same key with the same fingerprint returns the original result, while the same key with a different fingerprint is rejected with a generic 409 and never reuses another request's result. Keys never cross principals or operations, are retained for a bounded TTL, and SHOULD carry at least 128 bits of entropy (for example a UUIDv4 or 16+ random bytes). Reuse a key only when retrying the exact same request.

Required string length: 1 - 255

Body

application/json
address
string
required

A 20-byte EVM address.

Pattern: ^0x[a-fA-F0-9]{40}$

Response

The message to sign.

challenge_id
string
required
message
string
required

The EIP-4361 text to sign exactly as returned.

expires_at
string<date-time>
required