Create a gift card · Myntkaup API

Debits the amount and returns a single-use code. Idempotency-Key is required.

Scope: giftcards:create
Rate-limit class: giftcard
Authentication: Signed
Idempotency-Key: Required

Parameters

Idempotency-Keystringheaderrequired
1 to 64 characters of [A-Za-z0-9_-]. Kept for 24 h; reuse it to retry safely.
Matches ^[A-Za-z0-9_-]{1,64}$.

Request body

application/json · CreateGiftcardRequest. Unknown fields are rejected.

assetstringrequired
An upper-case asset symbol.
Matches ^[A-Z0-9]{1,15}$. Example: BTC.
amountstring (decimal)required
recipient_namestringoptional
1 to 60 characters. No control characters.

Responses

201 Created

The gift card, with its code. application/json · Giftcard

idstring
Starts with gc_.
assetstring
An upper-case asset symbol.
Matches ^[A-Z0-9]{1,15}$.
amountstring (decimal)
recipient_namestring | null
statusstring (enum)
One of unredeemed, redeemed.
codestringmay be absent
Only for keys that also have giftcards:create. Treat it like cash.
sourcestring (enum)
Where the record was made: this API, the mobile app or the webapp.
One of public_api, app, web.
created_atstring (date-time)
redeemed_atstring (date-time)nullable

Every response carries MK-Request-Id, plus RateLimit-Policy and RateLimit.

Errors

Errors use the error envelope. Match on code.

Status	Code	Meaning
400	`invalid_request`	The request is malformed: bad JSON, an unknown or invalid field, or a missing header.
401	`invalid_signature`	The MK-* headers are missing or malformed, the key id is unknown, or the signature doesn't match.
401	`key_expired`	The key has passed its expiry date.
401	`key_revoked`	The key was revoked.
401	`timestamp_out_of_range`	MK-Timestamp is more than 30 seconds from the server clock.
401	`nonce_reused`	This key already used this MK-Nonce.
403	`ip_not_allowed`	The request came from an address outside the key's IP allowlist.
403	`insufficient_scope`	The key doesn't have the scope this endpoint needs.
403	`account_restricted`	The account can't use the API right now (for example locked, inactive, or onboarding not finished).
403	`api_access_disabled`	API access is switched off.
409	`idempotency_conflict`	This Idempotency-Key was used with a different request body.
409	`idempotency_in_progress`	A request with this Idempotency-Key is still being processed.
413	`payload_too_large`	The request body is larger than 8 KB.
415	`unsupported_media_type`	Request bodies must be application/json.
422	`insufficient_funds`	The available balance doesn't cover the trade, gift card or withdrawal.
422	`amount_below_minimum`	The amount is below the minimum.
422	`amount_above_maximum`	The amount is above the maximum.
422	`limit_exceeded`	A daily or 30-day limit would be exceeded.
429	`rate_limited`	Too many requests. Wait for Retry-After seconds.
429	`too_many_concurrent_requests`	Too many requests in flight for this key or account.
429	`key_suspended`	The key is suspended, for example after sustained rate limiting.
500	`internal_error`	Something went wrong on our side.
502	`bad_gateway`	An upstream service answered unexpectedly.
503	`overloaded`	The service is overloaded. Retry after Retry-After seconds.
503	`service_unavailable`	The service is temporarily unavailable.
503	`maintenance`	The API is read-only for maintenance.
504	`gateway_timeout`	An upstream service didn't answer in time. A POST may still complete; retry with the same Idempotency-Key.

# Signed by sign-headers.sh: see Authentication
body='{"asset":"BTC","amount":"0.0005","recipient_name":"Anna"}'
idempotency_key=$(uuidgen)   # reuse it to retry safely
curl https://public-api.myntkaup.is/v1/giftcards \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $idempotency_key" \
  $(./sign-headers.sh POST /v1/giftcards "$body" | sed 's/^/-H /') \
  --data "$body"

import { Myntkaup } from "@myntkaup/api";

const client = new Myntkaup(); // reads the key from the environment
// Sends a random Idempotency-Key unless you pass idempotencyKey.
const card = await client.giftcards.create({ asset: "BTC", amount: "0.0005", recipientName: "Anna" });
console.log(card.id, card.code);

from myntkaup import Myntkaup

client = Myntkaup()  # reads the key from the environment
# Sends a random Idempotency-Key unless you pass idempotency_key.
card = client.giftcards.create(asset="BTC", amount="0.0005", recipient_name="Anna")
print(card["id"], card["code"])

201 Created

{
  "id": "gc_01JB8X2Q4M7Z3V9K5T1N6R0P2W",
  "asset": "BTC",
  "amount": "0.0005",
  "recipient_name": "Anna",
  "status": "unredeemed",
  "code": "m-k3x9q2ab",
  "source": "public_api",
  "created_at": "2026-11-03T10:15:10Z",
  "redeemed_at": null
}

Base URL https://public-api.myntkaup.is