# ntfy-mcp-server MCP Server

Send, manage, and replay ntfy push notifications via MCP.

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

## Status

Pod has not dialled ntfy-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 `ntfy-mcp-server` on npm. Runs locally.

## Known issues

**23 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

### bug(ntfy-service): upstream ntfy error text never reaches content[], and is discarded on classified failures

### Server version

2.1.1

### mcp-ts-core version

0.10.6

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

http

### Description

[ntfy](https://ntfy.sh) returns a descriptive JSON error body on every 4xx — an error string plus a docs link pointing at the exact parameter that was rejected. None of it reaches the agent through `content[]`, and classified failures drop it from `structuredContent` too.

Unclassified errors keep the body in `structuredContent.error.data.body`, but

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/16) · 2026-07-28 · closed · 3 comments

### feat(consent): elicit before high-impact notification actions

`ntfy_manage_message` is marked `destructiveHint: true`, but the handler calls `NtfyService.manage()` directly with no `ctx.elicit` confirmation. `ntfy_publish_message` can also trigger high-impact side effects (`email`, `call`, `broadcast` actions, and `http` action buttons) from model-supplied input.

## Proposal

Add an elicitation boundary before side effects where a mistaken or prompt-injected tool call is meaningfully disruptive.

### Scope

- `ntfy_manage_message`: ask for confirmation be

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/13) · 2026-06-28 · closed · 3 comments

### feat(ntfy-service): SSRF protection for base_url override

### Use case

The `base_url` override on `ntfy_publish_message`, `ntfy_manage_message`, and `ntfy_fetch_messages` accepts any string passing `z.url()` — no scheme allowlist, no host filtering. When the server runs publicly (Streamable HTTP transport, `MCP_AUTH_MODE=none`), unauthenticated callers can supply private/loopback/link-local URLs that the server then dereferences via `fetch`. This is a server-side request forgery surface.

Reachable from the host running the server:

- IPv4 private (10

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/6) · 2026-05-10 · closed · 3 comments

### feat(ntfy_fetch_messages): limit drops the newest messages instead of the oldest

`ntfy_fetch_messages` truncates with `notifications.slice(0, input.limit)`, keeping the **oldest** N of the matching window. The default lookback is `since: 10m` with `limit: 20`, so on a busy topic the most common question the tool exists to answer — "did my recent notification land?" — comes back with the start of the window and the recent messages dropped.

Related: #20

## Proposal

Keep the newest `limit` messages (`slice(-limit)`), matching what the `ntfy://{topic}` resource does, and stat

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/22) · 2026-07-30 · closed · 2 comments

### feat(schema): replace the priority literal union with an enum so validation errors stay readable

### Use case

`PrioritySchema` is built as `z.union([z.literal(1), … z.literal(5)])`. It serializes to a five-branch `anyOf` of `const` values instead of a plain enum, and a wrong value produces an `invalid_union` dump listing all five branches — roughly 40 lines of JSON for a one-character mistake.

Calling `ntfy_publish_message` with `priority: 9` returns:

```
MCP error -32602: Input validation error: Invalid arguments for tool ntfy_publish_message: [
  { "code": "invalid_union", "errors": [ 

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/21) · 2026-07-28 · closed · 2 comments

### Most recent

### fix(config): pin MCP_SESSION_MODE to stateful — the image ships stateless and breaks the confirmation gate for v1 HTTP clients

`Dockerfile` sets `ENV MCP_SESSION_MODE="stateless"`, but `.env.example` carries a commented `# MCP_SESSION_MODE=stateful`, whose comment documents the value set as `stateful | stateless (default: stateful)`. The container and the same code run via `bunx`, `npm start`, or from source therefore resolve to different session modes. `README.md` disagrees with both, listing the default as `auto` — three surfaces, three answers.

For this server the container is the one that is wrong.

Related: cyanhe

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

### feat(config): default MCP_SESSION_MODE to stateful across env, Docker, and src

`Dockerfile` sets `ENV MCP_SESSION_MODE="stateless"`, `.env.example` carries a commented `# MCP_SESSION_MODE=stateful`, and `README.md` documents the default as `auto`. The same code therefore runs stateless in the container and stateful everywhere else — `bunx`, `npm start`, or from source — since the framework schema defaults to `auto` and `auto` resolves to `stateful`.

The `.env.example` comment is also factually wrong. It reads `stateful | stateless (default: stateful)`, omitting `auto`, wh

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/30) · 2026-08-22 · open · 0 comments

### feat(ntfy_publish_message): add structured recovery for invalid delay

### Use case

`ntfy_publish_message` preserves ntfy's invalid-delay explanation on both response surfaces, but the failure has no stable `data.reason` and no recovery hint naming the accepted delay forms. One of ntfy's three delay rejections is also actively misrouted today.

ntfy answers a bad `delay` with one of three errors, all HTTP 400:

| Code | Upstream error | Current classification |
|:---|:---|:---|
| 40004 | `invalid delay parameter: unable to parse delay` | unclassified — bubbles to 

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/29) · 2026-08-17 · open · 0 comments

### bug(ntfy_manage_message): idempotentHint conflicts with emitted events

### Server version

2.3.0

### mcp-ts-core version

0.11.0

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

`ntfy_manage_message` advertises `idempotentHint: true`. `@modelcontextprotocol/sdk` 1.29.0 defines that hint as "calling the tool repeatedly with the same arguments will have no additional effect on its environment", and it is meaningful on this tool because `readOnlyHint` is unset (defaults to `false`).

Clearing and deleting are

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/25) · 2026-08-17 · open · 0 comments

### bug(ntfy_fetch_messages): empty filters silently widen the query

### Server version

2.3.0

### mcp-ts-core version

0.11.0

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

`since` carries a schema default of `10m`, but a Zod `.default()` only fires on `undefined`. An explicit `""` passes validation, is then dropped from the upstream query by a truthiness check in `NtfyService.fetch()`, and ntfy applies its own poll default of `since=all`. The documented `10m` guardrail is silently replaced by the ent

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/26) · 2026-08-17 · open · 0 comments

### bug(ntfy_fetch_messages): hard cap drops messages without a retrieval path

### Server version

2.3.0

### mcp-ts-core version

0.11.0

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

`ntfy_fetch_messages` keeps the newest `limit` matches and drops the older head, with `limit` capped at 100. Once more than 100 messages match, the dropped head is unreachable: the tool exposes no offset or cursor, and every path the truncation notice suggests is a dead end at the cap.

ntfy has no upstream lever for this either. I

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/27) · 2026-08-17 · open · 0 comments

### bug(formatting): plain ntfy text is interpreted as Markdown in content[]

### Server version

2.3.0

### mcp-ts-core version

0.11.0

### Runtime

Bun

### Runtime version

Bun 1.3.14

### Transport

HTTP (Streamable HTTP)

### Description

`format()` in `ntfy_publish_message` and `ntfy_fetch_messages` interpolates upstream-controlled strings straight into Markdown `content[]` text, so a message body becomes formatting instructions instead of data. The interpolated values are `title`, `message`, `click` (rendered as `[url](url)`), `attachment.name` / `url` / `type` (r

[Read the thread](https://github.com/cyanheads/ntfy-mcp-server/issues/28) · 2026-08-17 · open · 0 comments

[See all 18 reports Pod holds for ntfy-mcp-server](/mcp/ntfy-mcp-server/issues) — of 23 qualified upstream.

## Firsthand observations

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