Create a quote · Myntkaup API

A firm price for a buy or sell, valid for a few seconds (expires_at says when) and accepted at most once with POST /v1/trades. Give exactly one of base_amount and quote_amount. Refused with trading_halted for a short while after a fast price move.

Scope: trade
Rate-limit class: quote
Authentication: Signed
Idempotency-Key: Optional

Parameters

Idempotency-Keystringheaderoptional
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 · CreateQuoteRequest. Unknown fields are rejected.

assetstringrequired
An upper-case asset symbol.
Matches ^[A-Z0-9]{1,15}$. Example: BTC.
sidestring (enum)required
One of buy, sell.
base_amountstring (decimal)optional
Amount of the asset. Give this or quote_amount.
quote_amountstring (decimal)optional
Amount of USDC. Give this or base_amount.

Responses

201 Created

The quote. application/json · Quote

idstring
Starts with qt_.
assetstring
An upper-case asset symbol.
Matches ^[A-Z0-9]{1,15}$.
sidestring (enum)
One of buy, sell.
quote_currency"USDC"
base_amountstring (decimal)
quote_amountstring (decimal)
pricestring (decimal)
isk_estimatestring (decimal)nullable
Indicative.
statusstring (enum)
One of open, accepted, expired, filled, failed.
created_atstring (date-time)
expires_atstring (date-time)
trade_idstringnullable
Starts with tr_.

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401	`key_revoked`	The key was revoked.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	`asset_not_tradable`	The asset can't be traded right now.
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.
503	`trading_halted`	Trading is paused: switched off, or paused for this asset for a short while after a fast price move.
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","side":"buy","quote_amount":"100.00"}'
curl https://public-api.myntkaup.is/v1/quotes \
  -H "Content-Type: application/json" \
  $(./sign-headers.sh POST /v1/quotes "$body" | sed 's/^/-H /') \
  --data "$body"

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

const client = new Myntkaup(); // reads the key from the environment
const quote = await client.quotes.create({ asset: "BTC", side: "buy", quoteAmount: "100.00" });
console.log(quote.id, quote.base_amount, quote.expires_at);

from myntkaup import Myntkaup

client = Myntkaup()  # reads the key from the environment
quote = client.quotes.create(asset="BTC", side="buy", quote_amount="100.00")
print(quote["id"], quote["base_amount"], quote["expires_at"])

201 Created

{
  "id": "qt_01JB8X2Q4M7Z3V9K5T1N6R0P2W",
  "asset": "BTC",
  "side": "buy",
  "quote_currency": "USDC",
  "base_amount": "0.00104210",
  "quote_amount": "100.00",
  "price": "95960.12",
  "isk_estimate": "13421",
  "status": "open",
  "created_at": "2026-11-03T10:15:10Z",
  "expires_at": "2026-11-03T10:15:20Z",
  "trade_id": null
}

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