Developer Reference API

Fast, fully-offline developer reference lookups for HTTP status codes, IANA MIME types, and IANA top-level domains.

All data is bundled at the edge, so responses are O(1) Map/Set lookups with zero upstream calls — no third-party rate limits, no flaky dependencies, and no cold external services. Lookups return in single-digit milliseconds from the network edge nearest your users.

Get a free API key at dash.apicodex.io.

Features:

• HTTP Status Codes: Describe a single standard status code, or list and filter all codes by category
• MIME Types: Look up charset, compressibility, source and extensions for a media type, or resolve MIME type(s) from a file extension (full IANA mime-db, 2,600+ types)
• IANA TLDs: Validate a top-level domain against the IANA root zone, or list and prefix-search the complete TLD list (1,400+ domains)
• Case-insensitive matching, leading-dot tolerance for TLDs, URL-encoded MIME types, and sensible default limits