Upload-Post

Official

by Upload-Post

Overview Schema Source Related Servers Discussions Admin

TypeScript

Hybrid

Upload text post

upload_text

Publish text-only posts to multiple social platforms, with optional link previews and scheduling.

Instructions

Publish a text-only post. linkUrl (or platform-specific *LinkUrl) attaches a link preview where supported. Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target.

Input Schema

TableJSON Schema

Name	Required	Description
`user`	Yes
`title`	Yes	Post text / caption.
`linkUrl`	No	Generic link preview URL (LinkedIn, Bluesky, Facebook).
`timezone`	No	IANA timezone for scheduled date, e.g. 'Europe/Madrid'.
`platforms`	Yes	Required array of platform identifiers. Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target.
`addToQueue`	No	Insert into the user's posting queue instead of publishing now.
`asyncUpload`	No	Return immediately with request_id (default true).
`scheduledDate`	No	ISO 8601 date for scheduled publishing, e.g. '2026-12-25T10:00:00Z'. Omit for immediate post.
`maxPostsPerSlot`	No
`platformOptions`	No	Flat platform-specific override object with camelCase keys. Per-platform text overrides (xTitle, linkedinTitle, …) are also accepted. Keys the upload-post SDK does not support are silently ignored upstream. Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed11 schema fields changedv0.11.1Sep 9, 2026

removedInput schema / $schema

Removed value: -"http://json-schema.org/draft-07/schema#"

changedInput schema / properties / platformOptions / description

Previous value: -"Flat platform-specific override object with camelCase keys. Per-platform text overrides (xTitle, linkedinTitle, …) are also accepted. Keys the upload-post SDK does not support are silently ignored upstream."New value: +"Flat platform-specific override object with camelCase keys. Per-platform text overrides (xTitle, linkedinTitle, …) are also accepted. Keys the upload-post SDK does not support are silently ignored upstream. Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target."

changedInput schema / properties / platformOptions / properties / redditFlairId / description

Previous value: -"Reddit flair template ID."New value: +"Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target."

changedInput schema / properties / platformOptions / properties / redditLinkUrl / description

Previous value: -"Link to attach on Reddit."New value: +"Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target."

changedInput schema / properties / platformOptions / properties / redditSubreddit / description

Previous value: -"Subreddit name, without r/. Title is required for Reddit."New value: +"Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target."

addedInput schema / properties / platformOptions / properties / replyToId

Added value: +{
+  "description": "Publish as a reply to an existing post (X: tweet ID; Bluesky: post URL or AT-URI). On X's Pay-Per-Use tier a reply to an author the account has not engaged with is rejected with 403.",
+  "type": "string"
+}

addedInput schema / properties / platformOptions / properties / tiktokFirstComment

Added value: +{
+  "description": "First comment posted under the TikTok post, overriding the shared `firstComment` for TikTok only. Requires the 'comments' capability on the profile's TikTok account (see the `capabilities` array in list_users).",
+  "type": "string"
+}

addedInput schema / properties / platformOptions / properties / xReplyToId

Added value: +{
+  "description": "Alias of replyToId, scoped to X: the tweet ID to reply to.",
+  "type": "string"
+}

addedInput schema / properties / platforms / description

Added value: +"Required array of platform identifiers. Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target."

addedInput schema / properties / platforms / items / description

Added value: +"Target social platform. Reddit posting is currently unavailable (error_code=reddit_unavailable) until the Reddit app is restored. Do not use reddit as a publish target."

removedOutput schema / $schema

Removed value: -"http://json-schema.org/draft-07/schema#"

Changed6 schema fields changedv0.7.0Jul 29, 2026

removedInput schema / properties / autogenerate

Removed value: -{
-  "description": "If true, AI generates native per-platform title/description from the media and fills any field left empty.",
-  "type": "boolean"
-}

removedInput schema / properties / autogenerateDescription

Removed value: -{
-  "description": "Generate only the description with AI.",
-  "type": "boolean"
-}

removedInput schema / properties / autogenerateLanguage

Removed value: -{
-  "description": "Force the AI output language (ISO code); omit to auto-detect from the media.",
-  "type": "string"
-}

removedInput schema / properties / autogenerateTitle

Removed value: -{
-  "description": "Generate only the title with AI.",
-  "type": "boolean"
-}

addedInput schema / properties / platformOptions / properties / gbpMediaCategory

Added value: +{
+  "description": "Google Business gallery category for the uploaded photo. Only used with gbpPostType. Defaults to ADDITIONAL.",
+  "enum": [
+    "COVER",
+    "PROFILE",
+    "LOGO",
+    "EXTERIOR",
+    "INTERIOR",
+    "PRODUCT",
+    "AT_WORK",
+    "FOOD_AND_DRINK",
+    "MENU",
+    "COMMON_AREA",
+    "ROOMS",
+    "TEAMS",
+    "ADDITIONAL"
+  ],
+  "type": "string"
+}

addedInput schema / properties / platformOptions / properties / gbpPostType

Added value: +{
+  "description": "Publish into the Google Business location's photo gallery instead of creating a Local Post. Omitting it keeps the Local Post behaviour.",
+  "enum": [
+    "MEDIA",
+    "PHOTO",
+    "GALLERY"
+  ],
+  "type": "string"
+}

Changed1 schema field changedv0.5.0Jul 16, 2026

changedInput schema / properties / platforms / items / enum

Previous value: -[
-  "x",
-  "linkedin",
-  "facebook",
-  "threads",
-  "reddit",
-  "bluesky",
-  "google_business",
-  "discord",
-  "telegram"
-]New value: +[
+  "x",
+  "linkedin",
+  "facebook",
+  "threads",
+  "reddit",
+  "bluesky",
+  "google_business",
+  "discord",
+  "telegram",
+  "slack",
+  "mastodon",
+  "nostr",
+  "lemmy",
+  "devto",
+  "hashnode",
+  "wordpress",
+  "whop",
+  "listmonk"
+]

First observedv0.4.0Jul 16, 2026

TDQS

A4/5.0

Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already establish that this is a write operation that is not destructive, lowering the bar. The description adds useful operational context: the Reddit outage and error_code, and that link previews work only 'where supported'. However, it does not disclose behaviors like asyncReturn default, queue insertion, or silent ignoring of unsupported platformOptions keys, though some of these appear in the schema.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences, front-loaded with the core purpose, and no filler. The Reddit warning is prominently placed and repeated only where needed in the supporting schema. Every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the large schema, nested platformOptions object, and existing output schema, the description is sufficiently complete as an orientation layer. It covers the primary limitation (Reddit) and the distinguishing trait (text-only). It leaves queue/scheduling mechanics to the schema, which is acceptable given the schema's own detailed descriptions.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 80%, so the schema already documents most parameters. The description adds a useful generalization about `linkUrl` and platform-specific `*LinkUrl` variants, but it does not clarify the required `user` parameter or `maxPostsPerSlot`, and the added value over the schema is modest.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a specific verb-resource pair: 'Publish a text-only post.' This clearly differentiates it from media-oriented siblings like upload_photos and upload_video, and the 'text-only' qualifier removes ambiguity without requiring the agent to inspect the schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives clear context: this tool is for text-only posts, and it names an explicit exclusion ('Do not use reddit as a publish target') with a concrete reason. It does not name alternative tools for media posts or scheduling, but the core when/when-not guidance is present and actionable.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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