# Datamuse Word Predecessors

> Datamuse Word Predecessors is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns words that frequently precede a given word in text, powered by the Datamuse word relationship API.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/datamuse-word-predecessors
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/datamuse-word-predecessors-9462e6eb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BceWigPNX6vhG6uuaAnKW

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-9462e6eb -d '<json body>'
```

Example prompt: What words most frequently come right before the word 'storm' in text? I want to see the common predecessors for that word.

## When to prefer this

Use this endpoint when you need to find words that commonly precede a target word — useful for NLP tasks, writing assistance, autocomplete features, understanding collocations, or building word association tools. Prefer this over a full NLP library when you just need lightweight predecessor word lookups without running your own model.

## Known failure modes

- Missing or empty 'word' parameter returns an error or empty result
- Very rare or nonsensical words may return few or no results
- Non-English words may return empty or unexpected results
- Network timeout or upstream Datamuse API unavailability causes failure
- Payment failure (x402) if USDC not provided correctly

## How this service works

Words that frequently precede a given word in text (param: word). Query: ?word= Returns JSON.

## Output

A JSON array of words that frequently precede the given query word in text corpora, likely including frequency or score data indicating how commonly each predecessor word appears before the target word.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/datamuse-word-predecessors-9462e6eb/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)