Balances · Myntkaup API

Per asset: available, held and total, with indicative USDC and ISK values. USDC is always listed.

Scope: account:read
Rate-limit class: read
Authentication: Signed

Responses

200 OK

The balances. application/json · Balances

as_ofstring (date-time)
total_value_usdcstring (decimal)
total_value_iskstring (decimal)
dataarray of Balance
6 properties of each item
- assetstring
  An upper-case asset symbol.
  Matches ^[A-Z0-9]{1,15}$.
- availablestring (decimal)
- heldstring (decimal)
  holds + limit order holds + loan collateral holds.
- totalstring (decimal)
- value_usdcstring (decimal)nullable
  Indicative.
- value_iskstring (decimal)nullable
  Indicative.

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401	`key_revoked`	The key was revoked.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.
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.
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
curl https://public-api.myntkaup.is/v1/balances \
  $(./sign-headers.sh GET /v1/balances | sed 's/^/-H /')

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

const client = new Myntkaup(); // reads the key from the environment
const balances = await client.balances.list();
for (const balance of balances.data) {
  console.log(balance.asset, balance.available, balance.held);
}

from myntkaup import Myntkaup

client = Myntkaup()  # reads the key from the environment
balances = client.balances.list()
for balance in balances["data"]:
    print(balance["asset"], balance["available"], balance["held"])

200 OK

{
  "as_of": "2026-11-03T10:15:10Z",
  "total_value_usdc": "1180.31",
  "total_value_isk": "164210",
  "data": [
    {
      "asset": "BTC",
      "available": "0.0123",
      "held": "0",
      "total": "0.0123",
      "value_usdc": "1180.31",
      "value_isk": "164210"
    }
  ]
}

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