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The SDK surfaces two error classes: YoukaRequestError for HTTP and validation failures, and YoukaTaskError for async tasks that ended in a non-successful state. Both extend Error and carry structured fields so you can branch on code, status, and retryability.

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YoukaRequestError

Thrown for HTTP errors, request validation failures, and malformed responses. 
import { YoukaRequestError } from "@youka/sdk";

try {
  await client.projects.create(body);
} catch (error) {
  if (error instanceof YoukaRequestError) {
    console.error({
      code: error.code,
      message: error.message,
      status: error.status,
      retryable: error.retryable,
      details: error.details,
    });
  } else {
    throw error;
  }
}

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Fields

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code
string
Machine-readable error code, for example INVALID_REQUEST, UNAUTHORIZED, UPLOAD_FAILED.
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message
string
Human-readable description.
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status
number
HTTP status code, if available.
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retryable
boolean
true if the SDK considers the error worth retrying (rate limits, transient server errors, idempotent replay in progress).
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details
unknown
Server-provided details, typically a Zod issue list for validation errors.

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Common codes

CodeCauseRetryable?
INVALID_REQUESTRequest body failed schema validation before being sent.No
UNAUTHORIZEDMissing or invalid API key.No
NOT_FOUNDResource doesn’t exist or you lack access.No
CONFLICTVersion conflict (HTTP 409).Yes
TOO_MANY_REQUESTSRate limit hit (HTTP 429).Yes
INTERNAL_SERVER_ERRORTransient server failure (HTTP 500).Yes
IDEMPOTENT_REPLAY_IN_PROGRESSThe original request is still running under the same idempotency key (HTTP 202).Yes
INVALID_RESPONSEServer returned a body that didn’t match the expected schema.No
UPLOAD_FAILEDSigned URL upload returned non-2xx.Depends on status

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YoukaTaskError

Thrown from client.tasks.wait(...), client.projects.wait(...), and client.exports.wait(...) when the underlying task or export ends in failed, cancelled, or timed-out. 
import { YoukaTaskError } from "@youka/sdk";

try {
  await client.projects.wait(created);
} catch (error) {
  if (error instanceof YoukaTaskError) {
    console.error({
      code: error.code,
      message: error.message,
      status: error.status,
      task: error.task,
    });
  } else {
    throw error;
  }
}

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Fields

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code
'TASK_FAILED' | 'TASK_CANCELLED' | 'TASK_TIMED_OUT'
Maps directly to the task’s terminal status.
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message
string
Either the server-provided task error message or a generated fallback.
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status
TaskStatus
The terminal task status.
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task
RestTask
The full task payload at the moment of failure. Useful for logging and user-facing error messages.

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Retry pattern

Combine retryable with an idempotency key to build a safe retry loop: 
import { YoukaRequestError } from "@youka/sdk";

async function createWithRetry<T>(fn: () => Promise<T>, maxAttempts = 3) {
  let lastError: unknown;

  for (let attempt = 1; attempt <= maxAttempts; attempt++) {
    try {
      return await fn();
    } catch (error) {
      lastError = error;
      if (
        error instanceof YoukaRequestError &&
        error.retryable &&
        attempt < maxAttempts
      ) {
        await new Promise((r) => setTimeout(r, 2 ** attempt * 1_000));
        continue;
      }
      throw error;
    }
  }

  throw lastError;
}

await createWithRetry(() =>
  client.projects.create(body, {
    idempotencyKey: "import-2026-04-08-song-001",
  }),
);
Always reuse the same idempotency key across retries. Otherwise the server treats the retry as a new request and you may end up with duplicates.

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Abort and cancellation

Aborting a request throws a standard AbortError — not a YoukaRequestError. Check for it explicitly: 
try {
  await client.projects.wait(created, { signal: controller.signal });
} catch (error) {
  if (error instanceof Error && error.name === "AbortError") {
    console.log("Cancelled by user");
    return;
  }
  throw error;
}

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