Post Farcaster Cast
Post a cast (message) to Farcaster via Neynar API. Use this to share updates, announcements, or engage with the Farcaster community. Supports channels, threading (replies), and embeds (max 2 URLs). Max 1024 characters. Ideal for: price alerts, milestone announcements, community updates, automated social posts.
Catalog action Social farcaster
Post a cast (message) to Farcaster via Neynar API. Use this to share updates, announcements, or engage with the Farcaster community. Supports channels, threading (replies), and embeds (max 2 URLs). Max 1024 characters. Ideal for: price alerts, milestone announcements, community updates, automated social posts.
At a Glance
| Field | Value |
|---|---|
| Action ID | post-farcaster-cast |
| Category | Social |
| Connector | farcaster |
| Requires gas | No |
| Funds movement | None declared |
| Tags | social, farcaster, neynar, cast, write, post, web3, decentralized |
Payload Schema
| Field | Type | Required | Description |
|---|---|---|---|
text | string | Yes | The text content of the cast (max 1024 characters) |
channelId | string | No | Optional channel ID to post to (e.g., 'ethereum', 'base', 'gaming') |
parentCastHash | string | No | Optional parent cast hash to reply to |
embeds | array | No | Optional array of embed URLs (max 2) |
idem | string | No | Optional idempotency key to prevent duplicate casts |
Result Schema
| Field | Type | Required | Description |
|---|---|---|---|
status | string | Yes | Status of the cast operation |
castHash | string | No | Hash of the published cast |
authorUsername | string | No | Username of the cast author |
error | string | No | Error message if the cast failed |
Examples
json{ "type": "post-farcaster-cast", "payload": { "text": "Workflow completed" }, "children": [], "connector": { "type": "farcaster", "id": "conn_farcaster" }}
bashcurl -X POST "https://api.b3os.org/v1/actions/post-farcaster-cast/test" \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "inputs": { "text": "Workflow completed" }}'
Payload fields can use workflow expressions such as {{$trigger.body.amount}}, {{$nodes.fetch.result.price}}, and {{$props.asset}} when the value should come from a trigger, prior node, or reusable workflow prop.