Search autocomplete

Search autocomplete: query suggestions for a partial input as a flat JSON array. Useful for query expansion, did-you-mean refinement, and topic exploration. Returns up to 20 suggestions.

Input

Field	Type	Description
q *	string	Partial query (max 400 chars)
count	number	Suggestions to return, 1-20 (default 5)

Example output

{
  "query": "agent4",
  "count": 5,
  "suggestions": [
    "agent402",
    "agent4 mexico",
    "agent4 movie",
    "agent4you",
    "agent 47"
  ]
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/search-suggest?q=agent4&count=5"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/search-suggest?q=agent4&count=5");

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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