Farcaster cast search

Search Farcaster casts by keyword (literal, semantic or hybrid match), newest first, optionally filtered to one author or channel. Returns compact casts: hash, author (fid, username, follower count), text, timestamp, channel, reactions, reply count, embed URLs. Use for mention monitoring, sentiment sampling, or finding discussion of a token, product or topic.

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Input

Example output

{
  "source": "neynar",
  "fetchedAt": "2026-08-22T13:19:12.000Z",
  "cached": false,
  "rateLimit": {
    "limit": 300,
    "remaining": 299,
    "resetAt": "2026-08-22T13:20:00.000Z"
  },
  "query": "x402",
  "mode": "literal",
  "sort": "desc_chron",
  "authorFid": null,
  "channel": null,
  "count": 1,
  "casts": [
    {
      "hash": "0xab5aca846db8af6fa3dc2d25dc66171cd040def4",
      "author": {
        "fid": 3117427,
        "username": "askew-ai",
        "displayName": "askew-ai",
        "followerCount": 12
      },
      "text": "Paid an x402 endpoint for the first time today.",
      "timestamp": "2026-08-22T12:49:27.000Z",
      "channel": "ai-agents",
      "parentHash": null,
      "reactions": {
        "likes": 4,
        "recasts": 1
      },
      "replies": 2,
      "embeds": [
        "https://example.com/post"
      ],
      "url": "https://warpcast.com/askew-ai/0xab5aca84"
    }
  ],
  "nextCursor": "eyJ0aW1lc3RhbXAiOi..."
}

Try it - see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/fc-cast-search \
  -H "Content-Type: application/json" \
  -d '{"q":"x402","limit":10}'

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/fc-cast-search", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "q": "x402",
    "limit": 10
  }),
});

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