# clipboard-mcp-server MCP Server

Read, write, and inspect the system clipboard on macOS, Linux (X11/Wayland), and Windows via MCP.

**Publisher claimed.** No tool list reported, and Pod has not connected to this server.

## Status

Pod has not dialled clipboard-mcp-server yet, so everything on this page is what its publisher reported rather than what we observed. Registries describe servers; they do not connect to them. Until a check runs, treat the tool list below as a claim.

## Connect

Published as `@cyanheads/clipboard-mcp-server` on npm. Runs locally.

## Known issues

**24 problems reported by people outside the maintainer team.** Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 12.

### Most discussed

### ux(clipboard_write): HTML plain-text fallback strips tags but not script/style content, and loses word spacing between block elements

`clipboard_write` with `format: "html"` generates a plain-text fallback by stripping HTML tags. The current `stripHtmlTags` implementation has two quality issues: it includes inline content from `<script>` and `<style>` tags in the output, and it drops word boundaries between adjacent block elements.

### Server version

0.1.1

### mcp-ts-core version

0.9.9

### Runtime

Bun

### Runtime version

1.3.11

### Transport

HTTP (StreamableHTTP)

### Description

When writing `<h1>Title</h1><p>Body 

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/3) · 2026-05-25 · closed · 2 comments

### bug(clipboard_read): text format returns empty string on empty clipboard instead of format_unavailable

`clipboard_read` with `format: "text"` returns a successful empty-string response when the clipboard is completely empty, while `clipboard_inspect` correctly reports `primaryFormat: "empty"` and `clipboard_read` with `format: "auto"` correctly returns `format_unavailable`.

### Server version

0.1.1

### mcp-ts-core version

0.9.9

### Runtime

Bun

### Runtime version

1.3.11

### Transport

HTTP (StreamableHTTP)

### Description

On macOS, `pbpaste` returns an empty string when the clipboard i

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/2) · 2026-05-25 · closed · 2 comments

### bug(clipboard_read): RTF read throws internal TypeError instead of format_unavailable when RTF is absent

`clipboard_read` with `format: "rtf"` throws an internal `TypeError` (`-32603 InternalError`) instead of the declared `format_unavailable` contract error when RTF is not on the clipboard.

### Server version

0.1.1

### mcp-ts-core version

0.9.9

### Runtime

Bun

### Runtime version

1.3.11

### Transport

HTTP (StreamableHTTP)

### Description

Requesting `format: "rtf"` when the clipboard contains only text or HTML returns a cryptic internal error. The `image` format correctly returns `forma

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/1) · 2026-05-25 · closed · 2 comments

### bug(clipboard_inspect): avoid buffering Linux payloads for sizes

### Server version

0.1.8

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Not runtime-reproduced during validation

### Transport

stdio

### OS

Linux X11 and Wayland

### Description

`clipboard_inspect` is advertised as metadata-only, but both Linux backends read every recognized representation into a `Buffer` to calculate byte sizes. A large clipboard can be buffered repeatedly through several text aliases before the tool returns only metadata.

### Steps to reproduc

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/26) · 2026-08-31 · open · 1 comment

### bug(macos): file-list pasteboard type is misclassified as an image

### Server version

0.1.7

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Bun 1.4.0

### Transport

HTTP (Streamable HTTP) (reported; not exercised during this validation)

### OS

macOS 26.1 (source review; no live pasteboard reproduction)

### Description

`utiToFormat()` maps `NSFilenamesPboardType` to semantic `image`. Apple documents that deprecated pasteboard type as an array of filenames, while `JXA_READ_IMAGE` reads only `public.png`, `public.tiff`, and `com.appl

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/14) · 2026-07-10 · closed · 1 comment

### Most recent

### feat(clipboard_write): make clipboard clearing explicit

## Use case

Clearing sensitive clipboard content is a normal end-to-end clipboard workflow. Today `clipboard_write` accepts `content: ""` and creates a zero-byte text representation, but this destructive behavior is implicit: the tool description does not describe clearing, and `clipboard_inspect` reports `primaryFormat: "text"` rather than `empty` afterward.

## Proposal

Add an explicit clear mode to `clipboard_write` instead of relying on an empty write. Keep this within the existing mutator

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/24) · 2026-08-31 · open · 0 comments

### bug(clipboard_write): decode numeric entities in HTML fallback

### Server version

0.1.8

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Bun 1.4.0

### Transport

HTTP (Streamable HTTP)

### OS

macOS

### Description

The plain-text fallback generated by `clipboard_write` for HTML decodes a small hard-coded entity set but leaves numeric character references unchanged. Text consumers therefore receive entity syntax instead of the represented character.

Related: #3

### Steps to reproduce

1. Call `clipboard_write` with `{ "format":

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/25) · 2026-08-31 · open · 0 comments

### bug(clipboard_inspect): surface backend and measurement failures

### Server version

0.1.8

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Bun 1.4.0

### Transport

stdio

### OS

macOS, Linux, and Windows backends

### Description

`clipboard_inspect` converts backend decoding and per-format measurement failures into valid-looking empty or zero-byte results. A caller cannot distinguish a genuinely empty clipboard from malformed native output, or a genuine zero-byte representation from a failed size probe.

### Steps to reproduce

1. 

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/23) · 2026-08-31 · open · 0 comments

### bug(clipboard_read): preserve literal payloads in content output

### Server version

0.1.8

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Bun 1.4.0

### Transport

HTTP (Streamable HTTP)

### OS

macOS

### Description

`clipboard_read` appends text, HTML, and RTF payloads directly to the Markdown `content[]` block. Clipboard bytes remain intact in `structuredContent.content`, but content-only clients can interpret tags and Markdown metacharacters instead of receiving the literal clipboard representation.

Related: #6

### Steps to r

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/22) · 2026-08-31 · open · 0 comments

### bug(linux-wayland): wait for clipboard write completion

### Server version

0.1.8

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Not runtime-reproduced during validation

### Transport

stdio

### OS

Linux Wayland

### Description

`LinuxWaylandBackend.write()` reports success 50 ms after `wl-copy` emits `spawn`, without waiting for stdin to finish flushing or for clipboard ownership to be established. A slow or backpressured write can therefore return success while bytes are still pending, and later stream errors have no p

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/21) · 2026-08-31 · open · 0 comments

### bug(clipboard_read): populate image dimensions on Linux

### Server version

0.1.8

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Not runtime-reproduced during validation

### Transport

stdio

### OS

Linux X11 and Wayland

### Description

The public `clipboard_read` contract says image reads return PNG data with dimensions, but the X11 and Wayland backends return only `{ format, content }`. `width` and `height` are populated on macOS and Windows and silently absent on Linux.

### Steps to reproduce

1. Put an `image/png` r

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/20) · 2026-08-31 · open · 0 comments

### bug(clipboard_write): HTTP body cap preempts typed size recovery

### Server version

0.1.8

### mcp-ts-core version

0.12.3

### Runtime

Bun

### Runtime version

Bun 1.4.0

### Transport

HTTP (Streamable HTTP)

### OS

macOS

### Description

`clipboard_write` declares a 1 MiB content limit and a typed `content_too_large` recovery, but the HTTP transport's default 1 MiB request-body limit rejects the JSON-RPC envelope before the handler can run. The advertised tool error is therefore unreachable over HTTP, and content slightly below the tool limit can stil

[Read the thread](https://github.com/cyanheads/clipboard-mcp-server/issues/19) · 2026-08-31 · open · 0 comments

[See all 19 reports Pod holds for clipboard-mcp-server](/mcp/clipboard-mcp-server/issues) — of 24 qualified upstream.

## Firsthand observations

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