ViralCat

com.viral-catPublished by viral-cat.comOfficial publisherv1.0.0Updated Oct 24, 2026

Schedule and publish social posts across platforms, with drafts, media uploads and analytics.

Overview

AI-generated overview

Lets an assistant manage social media publishing: brands, drafts, scheduled posts, media uploads, connection health and performance metrics.

What you can do
Provides read tools for brands, posts, pipeline summaries, connected platform accounts, campaign rollups, content queues, failure diagnostics and post performance. Write tools create and update brands, create drafts, schedule, reschedule or cancel posts, retry failed posts, refresh engagement metrics, reconnect platforms and upload media to Google Drive. A read-only preflight check validates a post before it is scheduled.
When to use it
Useful when an assistant should help plan, draft and queue social content across platforms, review what is queued, diagnose failed posts, or pull engagement numbers without opening the dashboard.
Requirements
A remote streamable HTTP endpoint at viral-cat.com; no packages, environment variables or headers are declared. It works against the user's existing ViralCat account, brands and connected platform accounts, including a connected Google Drive for media.
Before you install
Several tools write: scheduling, rescheduling, cancelling, retrying failed posts, creating or updating brands, refreshing metrics and reconnecting platforms. Scheduled posts are published by a cron at the chosen time, so queued content can go live. upload_media fetches a public URL into the user's own Drive, and create_media_upload returns an upload URL that accepts bytes without an auth header. Platform connections and tokens are involved; tokens are not returned by the read tools.

Installation

In SourceWeft

  1. Open ViralCat in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.viral-cat%2Fviral-cat/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "viralcat": {
      "type": "http",
      "url": "https://viral-cat.com/api/mcp/mcp"
    }
  }
}

Tools

21

list_brands

List brands (content profiles), newest first, with per-brand post counts (posted/scheduled) and the next scheduled date. Use to see which brands exist and how active each is. Excludes archived brands. Returns `total` (all active brands) next to `count` (rows returned): when `truncated` is true the roster was cut off by `limit`, so raise it (max 50) before concluding a brand does not exist.

Parameterslimitinclude_samples

get_brand_details

Full content profile for one brand: description, taglines, hashtags, CTA/website URL, niche (category/subcategory), content type, target platforms, and active discount. Use this to write on-brand captions BEFORE calling create_draft or schedule_post. Read-only; returns no secrets.

Parametersbrand_idrequiredinclude_samples

list_posts

List posts across all platforms, newest scheduled first. Each row is one publication on one platform. Filter by status (draft|scheduled|posting|posted|failed|cancelled) and/or platform (youtube|tiktok|instagram|...). Returns caption, brand name, permalink, error message when present, and publishWarning for posts that succeeded with an anomaly (e.g. published without media).

Parameterslimitstatusplatforminclude_samples

get_pipeline_summary

High-level snapshot of the posting pipeline: active brand count, a status breakdown (how many scheduled/posted/failed/etc.), a per-platform breakdown, how many posts are due in the next 7 days, and the next scheduled date. Use for 'how's the pipeline?' style questions.

Parametersinclude_samples

list_connections

List connected platform accounts (channels) and their health: platform, account username, connected flag, posting-enabled flag, and token expiry. Use to check which platforms are wired up and whether any connection has expired. Never returns access or refresh tokens.

Parametersinclude_samples

post_performance

Publish-outcome metrics over a rolling window (default 30 days): posted/failed/cancelled totals, success rate, per-platform breakdown, and the most recent published posts with permalinks plus their latest stored engagement snapshot (views/likes/comments/shares; available for youtube/tiktok/twitter/threads). Snapshots are stored, not live: call refresh_post_metrics first if the numbers must be current. Optionally scope by brand_id and/or platform.

Parametersdaysbrand_idplatforminclude_samples

content_queue

The forward content pipeline: drafts awaiting approval first, then scheduled posts in publish order. Use to review what is queued before it goes out, and to find draft ids for schedule_post.

Parameterslimitinclude_samples

campaign_summary

Per-brand campaign rollup (brands are ViralCat's campaign unit): posted/scheduled/failed/draft counts, platforms used, next scheduled date, last posted date, and auto-post settings. Optionally scope to one brand_id.

Parametersbrand_idinclude_samples

diagnose_failures

Group failed posts by platform + normalized failure reason: counts, date range, affected brands, a sample raw error, a recoverable flag (retry_failed_posts can re-queue it) and a concrete suggested fix per group. Answers "what is broken and why" in one call. Read-only.

Parametersdaysplatforminclude_samples

preflight_check

READ-ONLY: validate a post BEFORE it is scheduled or published, so a problem is caught up front instead of discovered as a failure afterwards. Checks the exact things that produced the failed-post backlog: incompatible media for the platform (e.g. video to Pinterest), a disconnected or unrefreshable platform token (LinkedIn has no refresh token on this API tier and needs a manual browser reconnect roughly every 60 days — that's an expected state, not a bug), Facebook posting to an account with no Page (impossible via the Graph API), content referencing an already-passed date/season/promo code, and X/Twitter free-tier monthly write-cap headroom. Pass post_id to check one existing post; omit it to scan the forward queue (draft + scheduled, soonest first) and return only posts that have at least one issue.

Parameterslimitpost_idinclude_samples

create_draft

WRITE (safe): create a DRAFT post for a brand. Drafts are never picked up by the publisher, so nothing goes live; a human approves in the dashboard or promotes it later with schedule_post. scheduled_date is a proposed slot (default: 7 days out).

Parameterscaptionbrand_idrequiredplatformrequiredreply_textskip_hashtagsscheduled_date

schedule_post

WRITE (gated): queue a post for FUTURE publishing, at least 15 minutes out (immediate posting is not available over MCP). Either pass post_id to promote an existing draft, or brand_id + platform to create a new scheduled post. The publishing cron sends it at the scheduled time.

Parameterscaptionpost_idbrand_idplatformreply_textskip_hashtagsscheduled_daterequired

cancel_post

WRITE (safe): cancel a queued post, or move it to a new slot. Omit scheduled_date to CANCEL (status -> cancelled; the publisher ignores it). Pass scheduled_date to RESCHEDULE to that time instead (ISO 8601, at least 15 minutes out; a draft keeps its draft status). Works on draft or scheduled posts (cancel or reschedule); also works on FAILED posts but cancel-only (omit scheduled_date) — this is the way to clear a dead failed-post backlog, since failed has no other exit. Posts already posting/posted/cancelled are immutable. Get post ids from content_queue, list_posts or diagnose_failures.

Parameterspost_idrequiredscheduled_date

retry_failed_posts

WRITE (gated): bulk re-queue recoverable failed posts (default reason classes: token_expired, missed_window, platform_transient_error, drive_media_missing). dry_run DEFAULTS TO TRUE and only returns the plan; pass dry_run=false to actually reschedule. Retries are staggered per platform (spacing_minutes apart) and capped at limit, so a bulk retry cannot dogpile a platform API. Posts that would structurally fail again (archived brand, incompatible media, Facebook with no Page) are skipped with the reason. Use diagnose_failures first to see what is recoverable.

Parameterslimitdry_runreasonsplatformstart_atspacing_minutes

reschedule_post

WRITE (gated): move ONE post to a new future slot (ISO 8601, at least 15 minutes out). Unlike cancel_post this also accepts FAILED posts: a failed post is re-queued (status -> scheduled, error cleared). Draft and scheduled posts keep their status. Refuses posts that would structurally fail again (archived brand, incompatible media, Facebook with no Page).

Parameterspost_idrequiredscheduled_daterequired

refresh_post_metrics

WRITE (gated): fetch current engagement (views/likes/comments/shares) for already-published posts and store today's snapshot, then read it back with post_performance. This is the only way to update the numbers without opening the dashboard Stats tab. Supported platforms: youtube, tiktok, twitter, threads; LinkedIn and the rest expose no engagement API. A 60-minute cooldown applies per account and protects X's free-tier read quota, so a call inside it returns skipped:true and changes nothing. Publishes nothing and reaches no audience.

Parametersinclude_samples

reconnect_platform

WRITE (safe): attempt a server-side token refresh for a platform whose access token has lapsed, updating the stored connection's token/expiry. Works without a browser when a refresh token is on file (twitter/youtube/google_drive self-heal this way); returns needsManualReauth + a dashboard link when the platform genuinely requires a manual browser reconnect (e.g. threads). Cannot publish or touch content, only refreshes credentials; safe to retry. Never exposes tokens.

Parametersplatformrequired

upload_media

WRITE (gated): fetch a public media URL and store it in the connected Google Drive, returning the Drive fileId to pass to create_draft or schedule_post. This uploads to YOUR OWN Drive; it publishes nothing and reaches no audience. Accepts video, image or audio up to 100MB. With brand, files land in the folder the generator actually reads for that media type: Viral-Cat/_Res/{brand}/Imgs for an image, Vids for a video, Music for audio. Without brand it defaults to the Viral-Cat folder, and folder_id overrides both.

Parameterskindbrandfile_namefolder_idsource_urlrequired

create_media_upload

WRITE (gated): open a Google Drive upload session for media you hold locally, so a clip rendered on your own machine never has to be published publicly just so ViralCat can fetch it back. Returns an uploadUrl - PUT the bytes to it yourself (no auth header) and Drive stores the file; the response Location/id is the fileId for create_draft or schedule_post. When brand is given the file lands in the folder the generator actually reads for that media type: Viral-Cat/_Res/{brand}/Imgs for an image, Vids for a video, Music for audio. Without brand it defaults to the Viral-Cat folder. Video, image or audio up to 100MB. Publishes nothing and reaches no audience.

Parameterskindbrandfile_namerequiredfolder_idmime_typerequiredsize_bytesrequired

create_brand

WRITE (gated): create a brand (content profile) so create_draft and schedule_post have something to target. Every other write here needs a brand_id, so an agent had no way to set one up. Returns the brand_id and the Drive folder the publisher will read its media from (Viral-Cat/_Res/{name}/Vids). Publishes nothing and reaches no audience.

Parametersnamerequiredcta_urlhashtagsdescriptionwebsite_urlcontent_type

update_brand

WRITE (gated): correct a brand's content profile: description, taglines, hashtags, CTA and website links, content type, and the auto-post switch. This is the repair path for a brand carrying wrong copy, which otherwise makes every caption for it wrong, and the off switch for a brand whose generator is posting against your content rules. Only the fields you pass change; the rest keep their stored values. Cannot rename a brand (the name also names its Drive media folder) and cannot touch posting frequency/day or discount settings. Queues nothing and publishes nothing itself.

Parameterscta_urlbrand_idrequiredhashtagstaglinesdescriptionwebsite_urlcontent_typeauto_post_enabled

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

83% of the applicable checks met

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  • Documentation15 pts

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  • LicenseNot applicable

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