ChatGPT Plugin

PostFast

Plan and schedule social posts

Brand: PostFast

Category: Marketing
Primary Subcategory: Social Media Management & Scheduling

Integration details

Description

PostFast is a social media management tool. This plugin connects your existing PostFast workspace so you can run your posting workflow in conversation instead of opening the dashboard. Plan and schedule Draft a post, choose which of your connected accounts it goes to, attach an image or video, and place it on the calendar for a specific time. Save it as a draft, route it for approval, or approve one that is already waiting. Review what is queued and remove a scheduled post. Supported accounts: X, LinkedIn, Instagram, Facebook, TikTok, Pinterest, Threads, YouTube, Bluesky, Telegram, and Google Business Profile. Check how posts did Look up the performance of a published post, or how an account's follower count has moved day by day. Analytics cover Instagram, Facebook, Threads, TikTok, YouTube, Pinterest Business accounts, and LinkedIn company pages. Add an account Generate a link that opens PostFast's account connection flow when you want to add a new social profile. How it works PostFast connects to each social network under its own app registrations and platform credentials, and stores your drafts, scheduled posts, media and comment history in your own PostFast workspace. This plugin is a first-party interface to that product, not a generic pass-through layer. Some tools do call a platform live, for example when publishing a post, and each of those is labelled as such. You sign in with your existing PostFast account over OAuth. Viewing accounts, writing posts, and reading analytics are separate permissions that you grant individually, and you can disconnect at any time. The connector also exposes comment management tools used by other clients, which are not part of the workflows described here.

Integration type: Plugin
Verification status: Not applicable
Platform: ChatGPT
Category: Marketing
Primary Subcategory: Social Media Management & Scheduling
Secondary Subcategories: None listed
Brand: PostFast
Access: Account required
First tracked: 2026-09-16
Tool count: 29
Market: US

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Primary Subcategory

Competing in ChatGPT Social Media Management & Scheduling

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Listed in alphabetical order

Primary Subcategory

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Tools

29 tools agents can invoke

Approve posts so they publish at their scheduled time. This is the only way a post created with create_posts goes out, so show the user exactly what will be posted, where and when, and call this only after they say yes in the conversation, even if they asked you to post it. Can also set PENDING_APPROVAL, REJECTED or NEEDS_WORK. If its scheduled time passed more than 2 hours ago, don't approve it. Tell the user, and only if they agree, create it again with a new time and delete the old one.
approve_posts
Assign a conversation to a workspace member for follow-up, or omit assigneeUserId to unassign. The assignee must be a member of the workspace (inbox.assigneeNotMember otherwise). Internal to PostFast — nothing changes on the platform.
assign_inbox_conversation
Called by the PostFast calendar when a post is opened: its full text, first comment and every image or video. Read-only.
get_calendar_post
Opens the PostFast content calendar: posts from the last 2 days through the next 14, grouped by day, drafts without a date, and a filter by account. Read-only: the calendar never approves, publishes, replies to or deletes anything; those go through the conversation.
open_postfast
Create social media posts (batch up to 15), held for approval: nothing publishes until approve_posts sets them to APPROVED. Each post targets one social account (socialMediaId from list_accounts). SCHEDULED requires scheduledAt on every post; DRAFT must omit scheduledAt. Scheduling to a disconnected account (connectionStatus DISABLED in list_accounts) is rejected with HTTP 400 "socialMediaDisconnected" — pre-check connectionStatus before calling. Saving as DRAFT to a disconnected account is allowed. TikTok, Instagram, YouTube, and Pinterest require at least one media item EVEN FOR DRAFTS — attach media first (ask the user for an image/video, or generate+upload one, if none was provided). Google Business Profile accepts text-only posts, or one image and no video. A post carries at most 10 media items. Attach media via the key returned by upload_from_url / upload_media. A Threads post can carry one topic, set with controls.threadsTopicTag; like every control it applies to every post in the call, so put Threads posts with different topics in separate calls.
create_posts
Delete a social media post by id. This removes the post from PostFast — its record, its schedule, and its stored media. It does NOT delete anything from the social platform: a post that has already published stays live there and must be removed on the platform itself. Deleting a SCHEDULED post that has not published yet does prevent it from publishing. Deleting can't be undone, so show the user which post (account, time, first line) and call this only after they say yes in the conversation.
delete_post
Delete several social media posts by id in one call (up to 100; use delete_post for a single post). This removes each post from PostFast — its record, its schedule, and its stored media. It does NOT delete anything from the social platform: a post that has already published stays live there and must be removed on the platform itself. Deleting a SCHEDULED post that has not published yet does prevent it from publishing. Returns { deletedIds, notFoundIds }; notFoundIds are the ids that don't exist in this workspace, listed once each. Deleting can't be undone, so show the user every post you are about to delete (account, time, first line) and call this only after they say yes in the conversation.
delete_posts
Generate a shareable link for external clients to connect their social accounts to the workspace. Can be scoped to specific platforms and return the user to your own app when done. Email the link (sendEmail) only when the user asks you to and gives the address.
generate_connect_link
Daily follower-count snapshots for one connected account (pass its socialMediaId from list_accounts). Returns currentFollowerCount, delta (current − first snapshot in range), trackingStartedAt (when PostFast began recording this account), and a series of { capturedAt, followerCount } points. All counts are strings (bigint); currentFollowerCount, delta, and trackingStartedAt may be absent until the account has its first snapshot. Optional from/to bound the range (ISO 8601; default last 90 days, capped at 365). Snapshots are forward-only — no data before trackingStartedAt. Coverage: Facebook Pages, Instagram, YouTube, Pinterest, Threads, Bluesky, Telegram, LinkedIn company pages, and TikTok. Not available: X, personal Facebook.
get_follower_history
Fetch one inbox conversation by id, including its server-computed reply capability (canReply, maxReplyLength, windowState, disabledReason) — derive reply ability from these fields, never from hardcoded platform rules. postPreview carries the post's caption and, when available, its public permalink — use the permalink to link the user to the post on the platform (null on Instagram for now). Returns null when the conversation does not exist in the workspace.
get_inbox_conversation
Total unread comment count across all inbox conversations in the workspace (the sum of per-conversation unreadCount). Use mark_inbox_conversation_read after presenting a conversation to the user.
get_inbox_unread_count
Fetch published posts with their latest performance metrics (impressions, reach, likes, comments, shares). Only returns published posts that have a platform post ID. LinkedIn personal accounts are excluded. Supported: Instagram, Facebook, TikTok, Threads, YouTube, LinkedIn (company pages), Pinterest (Business accounts). Metric counts are returned as strings. Pinterest extras include pin_clicks, outbound_clicks, saves_90d, save_rate_90d (saves are 90-day rolling because Pinterest API does not expose lifetime totals); video pins additionally surface mrc_views, views_10s, avg_watch_time, v50_watch_time, video_starts, quartile_95_views. Video posts also include normalized watch-time on latestMetric: avgWatchTimeSeconds, totalWatchTimeSeconds, videoViews (Facebook, Instagram Reels, YouTube, Pinterest, LinkedIn company pages, TikTok). Instagram posts also include on latestMetric: saveRate (saves / reach as a percentage, rounded to 2 decimals — on IG feed posts, reels, and carousels with metrics) and reelsSkipRate (Instagram Reels only — percentage of viewers who skipped the reel in the first 3 seconds, as reported by Instagram, rounded to 2 decimals; may be absent on low-view reels or until metrics refresh). TikTok also exposes total_time_watched, average_time_watched, and full_video_watched_rate in metric.extras.
get_post_analytics
List all social media accounts connected to the workspace. Each account includes connectionStatus (CONNECTED or DISABLED) and disabledReason (null unless DISABLED), plus followerCount (latest stored snapshot, a string; absent for platforms without follower data), followerCountUpdatedAt, and inboxCapable (whether the account can appear in the social inbox, i.e. comment ingestion is supported). A DISABLED account will not publish until the user reconnects it — pre-check before scheduling. For a follower trend over time, use get_follower_history.
list_accounts
List Google Business Profile locations for a connected GBP account (pass its socialMediaId). Use a returned location’s locationId field as controls.gbpLocationId in create_posts.
list_gbp_locations
List comment conversations from the social inbox — comments on your connected accounts' posts, grouped per post, newest activity first. Covers TikTok, Instagram, Facebook Pages, and Threads; an account's inboxCapable flag (from list_accounts) tells you whether comments can flow for it today. Comments arrive within seconds of being posted and only from connect/launch onward (no history backfill). Each conversation carries a server-computed reply capability — canReply, maxReplyLength, windowState, disabledReason — plus unreadCount, status (OPEN | SNOOZED | CLOSED), and assignedToUserId. ALWAYS derive whether and how long you can reply from those fields; never assume platform rules. postPreview carries the post's caption and, when available, its public permalink — use the permalink to link the user to the post on the platform (null on Instagram for now).
list_inbox_conversations
List the items of one inbox conversation — the comments and the replies sent to them — oldest first by default (order=DESC for newest first). Items carry direction (INBOUND | OUTBOUND), state (VISIBLE | HIDDEN | DELETED), author info, and on Instagram comments canPrivateReply (eligibility for a PRIVATE_REPLY through prepare_inbox_action). Replies sent from PostFast appear exactly once — no duplicates when the platform reports them back.
list_inbox_items
List Pinterest boards for a connected Pinterest account (pass its socialMediaId). Use a returned board’s boardId field as controls.pinterestBoardId in create_posts.
list_pinterest_boards
List social media posts with optional filters for specific IDs, accounts, platform, status, and date range. Failed or missed posts carry a lastError { message, code }; codes include MISSED_DISCONNECTED (the account was disconnected when the post was due — reconnect, then retry) and MISSED_NOT_PUBLISHED (passed its scheduled time plus a 2h grace window without publishing). Each post also carries controls { threadsTopicTag, instagramPublishType, facebookContentType, tiktokIsDraft, youtubePrivacy }, each null when unset. Only the field for the post's own platform (its account's platform in list_accounts) is meaningful: posts created through the API store every platform's defaults, so the other fields can be non-null.
list_posts
List trending pre-cleared Commercial Music Library tracks for a connected TikTok account. Returns up to 100 trending sounds with musicSoundId, name, artist, duration, and preview/thumbnail URLs. Pass a musicSoundId to create_posts as tiktokMusicSoundId to attach that sound to a TikTok photo, carousel or video post. genre takes raw TikTok values like 'POP', 'HIP_HOP/RAP', 'R&B/SOUL', 'K-POP' (invalid values return the full valid list in the error). The list rotates daily — fetch fresh rather than reusing old ids for display. An unknown countryCode returns an empty list. If the API returns tiktokMusic.requiresBusinessApi, the TikTok account needs a one-time reconnect.
list_tiktok_sounds
List the workspaces this connection can act in. Use a workspace id as the optional workspaceId argument on other tools to operate across multiple workspaces (the default workspace is used when omitted).
list_workspaces
List YouTube playlists for a connected YouTube account (pass its socialMediaId). Use a returned playlist’s playlistId field as controls.youtubePlaylistId in create_posts.
list_youtube_playlists
Mark one conversation read (zeroes its unreadCount). Do this after presenting a conversation's comments to the user. Internal to PostFast — nothing changes on the platform.
mark_inbox_conversation_read
Hide a comment from the public on the platform (HIDE) or restore it (UNHIDE). Works on TikTok, Instagram, Facebook and Threads and can be reversed. To delete a comment permanently, use prepare_inbox_action with action DELETE. State changes made on the platform itself sync back to the inbox automatically. Hide or unhide a comment only when the user asks.
set_inbox_item_state
Opens the PostFast calendar in a tab beside this conversation: the same posts, drafts and account filter as the sidebar calendar. Read-only: the calendar never approves, publishes, replies to or deletes anything; those go through the conversation.
postfast_tab
Called by the PostFast calendar to record which of its buttons was used (open in PostFast, review in chat, reconnect, connect an account, new post), for product analytics. Changes no posts, accounts or settings.
record_app_action
Search for a place to geotag a post. Pass free text (min 2 chars, e.g. a venue name or address); returns matching places, each with an id that works as BOTH controls.facebookPlaceId (Facebook feed posts) and controls.instagramLocationId (Instagram single-media posts). Only Facebook Pages that carry location data are returned.
search_places
Triage a conversation: set its status to OPEN, SNOOZED, or CLOSED. Internal to PostFast — nothing changes on the platform.
set_inbox_conversation_status
Upload an image, video, caption file or document for use in create_posts. If the media is already at a public https URL, use upload_from_url instead. If the user attached or generated the file in this conversation and your app passes files to tools, pass it as `file`; the app fills it in. Otherwise pass the file's bytes as base64 in `data` with its MIME type in `contentType`. Only if you can do neither, ask the user for a public https link and use upload_from_url. Returns { media_id, type }; use an IMAGE or VIDEO media_id as a mediaItems[].key. A CAPTION media_id (an .srt or .vtt caption file) goes in controls.youtubeCaptionKey, never in mediaItems. A DOCUMENT media_id (a PDF, Word or PowerPoint file) goes in controls.linkedinAttachmentKey, never in mediaItems. Supported types: image/jpeg, image/png, image/gif, image/webp, video/mp4, video/webm, video/quicktime; for caption files application/x-subrip (.srt) and text/vtt (.vtt); for LinkedIn documents application/pdf (.pdf), application/msword (.doc), application/vnd.openxmlformats-officedocument.wordprocessingml.document (.docx), application/vnd.ms-powerpoint (.ppt) and application/vnd.openxmlformats-officedocument.presentationml.presentation (.pptx).
upload_media
Fetch media from a public https URL and store it for use in create_posts. Returns { media_id, type }; pass an IMAGE or VIDEO media_id as a mediaItems[].key. A CAPTION media_id (an .srt or .vtt caption file) goes in controls.youtubeCaptionKey, never in mediaItems. A DOCUMENT media_id (a PDF, Word or PowerPoint file) goes in controls.linkedinAttachmentKey, never in mediaItems. Use this when the media is already at a public https URL, such as a CDN or hosted image. Redirects are followed (each hop is SSRF-validated); the URL must be public https and within the size limit. For a caption file or a document, link to the file itself; a share page doesn't work. Supported types: image/jpeg, image/png, image/gif, image/webp, video/mp4, video/webm, video/quicktime; for caption files application/x-subrip (.srt) and text/vtt (.vtt); for LinkedIn documents application/pdf (.pdf), application/msword (.doc), application/vnd.openxmlformats-officedocument.wordprocessingml.document (.docx), application/vnd.ms-powerpoint (.ppt) and application/vnd.openxmlformats-officedocument.presentationml.presentation (.pptx).
upload_from_url

FAQs

PostFast ChatGPT Plugin FAQ

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How do I improve PostFast's ChatGPT Plugin discoverability?

The levers are the listing surface agents actually read: names, descriptions, keywords, tool metadata, and registry health. Which lever matters depends on where discovery breaks, which is what continuous measurement shows.

What are PostFast alternatives on ChatGPT?

As of 2026-10-31, PostFast competes with 8digit Planner, Abency, AdaptlyPost, Adly, Adzviser Sprout Social, AgentFabrica, Antwork, AuthoredUp and 100 more in ChatGPT Social Media Management & Scheduling, ranked by public Discoverability Score.

Where is this profile measured?

This profile uses the geography attached to the latest public registry snapshot: US. Locale tags are intentionally omitted.