# Datamuse Word Predecessors Lookup

> Datamuse Word Predecessors Lookup is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns words that frequently precede a given word (e.g. 'wreak' for the query 'havoc'), powered by the Datamuse lexical API.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/datamuse-predecessors
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/datamuse-word-predecessors-lookup-196c40be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mu9Gm3a3BwAB6pFHJJKVO

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability datamuse-word-predecessors-lookup-196c40be -d '<json body>'
```

Example prompt: What words most commonly come right before 'havoc' in English — like 'wreak havoc'? Give me the full list of typical predecessors for that word.

## When to prefer this

Choose this endpoint when you need to find words that typically appear immediately before a specific word — useful for writing assistance, NLP feature engineering, collocation research, or discovering idiomatic phrases. Prefer this over a general thesaurus when you specifically need predecessor collocations rather than synonyms, antonyms, or successors.

## Known failure modes

- Empty result array if the word has no known common predecessors in the corpus
- No results for rare, coined, or misspelled words
- HTTP 402 if payment is not provided or fails
- Unexpected results if a multi-word phrase is passed instead of a single word

## How this service works

Words that frequently precede the given word q (e.g. havoc to wreak). Query: ?q= Returns JSON.

## Output

A JSON array of words (with associated scores or frequency metadata) that commonly precede the queried word in natural English usage, drawn from the Datamuse lexical database.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/datamuse-word-predecessors-lookup-196c40be/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)