Firecrawl Common Errors

Overview

Quick-reference diagnostic guide for the most common Firecrawl API errors. Covers HTTP status codes, SDK exceptions, empty content, and crawl job failures with concrete fixes.

Prerequisites

• Firecrawl SDK installed (@mendable/firecrawl-js)
• FIRECRAWL_API_KEY environment variable set
• Access to error logs or console output

Error Reference

401 Unauthorized — Invalid API Key

Error: Unauthorized. Invalid API key.

Cause: API key is missing, malformed, or revoked.

set -euo pipefail
# Verify key is set and starts with fc-