postcache

dev.postcachePublished by postcache.devOfficial publisherv1.0.0Updated Oct 24, 2026

Public, short-lived media URLs for agents posting to Instagram, Threads and Facebook.

VerifiedStreamable HTTPWeb executableMedia & Design

Overview

AI-generated overview

Lets an assistant upload images or videos and get short-lived public URLs to hand to Instagram, Threads or Facebook posting APIs.

What you can do
Provides four tools for media that social posting APIs need. upload_media uploads an image or video and returns a public URL that passes platform media rules, or the problems with suggested fixes; check_media checks a file against a platform without storing it; get_media reports status, URL, expiry and fetch count of an uploaded file; delete_media removes an uploaded file immediately. With conversion enabled, a fixable file returns as converting and must be polled until ready or failed.
When to use it
Use it when an assistant needs to post images or videos to Instagram, Threads or Facebook and the platform requires a publicly reachable media URL. Also useful for checking a file against platform rules before posting.
Requirements
A remote endpoint at postcache.dev and a bearer API key supplied in the Authorization header. No local package or environment variables are needed.
Before you install
Requires an API key in the Authorization header, so keep it private. Uploaded media is stored by a third-party service and given a public URL that anyone with the link may reach, and URLs expire. delete_media removes files immediately; call it after publishing so public content does not linger.

Installation

In SourceWeft

  1. Open postcache in the dashboard and add it to a workspace.
  2. Connect Authorization token credentials. They are stored privately and never shown on public pages.
  3. 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/dev.postcache%2Fpostcache/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": {
    "postcache": {
      "type": "http",
      "url": "https://postcache.dev/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_TOKEN>"
      }
    }
  }
}

Tools

4

upload_media

Upload an image or video for a social platform. Returns a public URL that passes the platform media rules, or the problems with fixes. With convert, a fixable file comes back as status "converting": poll get_media until status is "ready" (url set) or "failed". Give the URL to the platform API (image_url / video_url), then call delete_media.

Parametersttltargetrequiredconvertfilenamesource_urldata_base64

check_media

Check a file against a platform without storing it. With convert, also says whether conversion can fix it.

Parametersttltargetrequiredconvertfilenamesource_urldata_base64

get_media

Status (converting, ready, failed), URL, expiry and fetch count of an uploaded file.

Parametersidrequired

delete_media

Delete an uploaded file now (call after the post is published).

Parametersidrequired

Version history

1
  1. v1.0.0LatestOct 9, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.