# WorldData402 Dictionary Lookup

> WorldData402 Dictionary Lookup is a paid API for AI agents from worlddata402.worlddata402.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).

Returns dictionary definition and linguistic data for a given English word via pay-per-call x402 micropayment.

## Facts

- Endpoint: POST https://worlddata402.worlddata402.workers.dev/v1/dictionary/%7Bword%7D?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/worlddata402-dictionary-lookup-36be40ea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GE7IyaXlZWQCXFkt2ZK4v

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 worlddata402-dictionary-lookup-36be40ea -d '<json body>'
```

Example prompt: Can you look up the definition of 'ephemeral' in the WorldData402 dictionary and tell me what it means?

## When to prefer this

Choose this endpoint when you need programmatic, pay-per-call dictionary lookups without API key subscriptions, especially in autonomous agent workflows that use the x402 micropayment protocol on Base mainnet. Prefer it over subscription-based dictionary APIs when usage is sporadic and cost-per-call billing is more economical.

## Known failure modes

- Word not found in dictionary — returns 404 or empty result
- Payment failure or insufficient USDC balance — returns 402 payment required
- Invalid or malformed word parameter — returns 400 bad request
- Service unavailable or Cloudflare Worker timeout — returns 503 or 504

## How this service works

Global market, government and reference data for AI agents. Pay-per-call over x402 (USDC on Base mainnet).

## Output

Returns a dictionary entry for the specified word, including its definition(s), part of speech, and possibly usage examples or linguistic metadata, paid per call via USDC on Base mainnet through the x402 protocol.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/worlddata402-dictionary-lookup-36be40ea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from worlddata402.worlddata402.workers.dev](https://www.zero.xyz/host/worlddata402.worlddata402.workers.dev/llms.txt)