Datamuse Word Autocomplete

Use this endpoint when you need server-side word autocomplete suggestions based on a spelling prefix, especially for search boxes, text editors, or NLP pipelines. Prefer this over local dictionary lookups when you want Datamuse's curated, frequency-weighted word list without hosting your own lexical database.

• Missing 'word' query parameter returns error or empty result
• Very short or single-character prefix may return too many or irrelevant results
• Non-alphabetic or special character prefixes may return empty results
• Rate limiting or payment failure (x402) if USDC balance is insufficient