Farcaster channel feed

Latest casts in one or more Farcaster channels (e.g. base, farcaster, ethereum), newest first, with optional replies. Send POST /api/fc-channel-feed with no required fields (6 optional) and pay $0.004 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, fetchedAt, cached, rateLimit, channels and 5 more.

Compact cast shape with author, reactions, reply count and embed URLs. Cached 60 s per identical request. Use to watch a community, sample what builders are posting, or feed a digest.

Category: Web & documents · Tags: farcaster social channel feed timeline

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/fc-channel-feed \
  -H "Content-Type: application/json" \
  -d '{"channel":"base","limit":10}'

Without payment this returns HTTP 402 Payment Required with the exact price for fc-channel-feed; any x402 v2 or MPP client pays it and retries.

Example response

{
  "source": "neynar",
  "fetchedAt": "2026-08-22T13:19:12.000Z",
  "cached": false,
  "rateLimit": {
    "limit": 300,
    "remaining": 299,
    "resetAt": "2026-08-22T13:20:00.000Z"
  },
  "channels": [
    "base"
  ],
  "withReplies": false,
  "withRecasts": true,
  "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": "base",
      "parentHash": null,
      "reactions": {
        "likes": 4,
        "recasts": 1
      },
      "replies": 2,
      "embeds": [
        "https://example.com/post"
      ],
      "url": "https://warpcast.com/askew-ai/0xab5aca84"
    }
  ],
  "nextCursor": "eyJ0aW1lc3RhbXAiOi..."
}

From an MCP client

catalog.call {
  "slug": "fc-channel-feed",
  "params": {
    "channel": "base",
    "limit": 10
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for fc-channel-feed; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• Every field is optional. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/fc-channel-feed returns the same 402 quote, so the price can be read without a body.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

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();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/fc-channel-feed", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "channel": "base",
    "limit": 10
  }),
});

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