PayperDrop
app.payperwork/dropspayperwork.appstreamable-httpv0.4.1Scanned
Temporary key-value drops and hand-off channels between agents, paid per call over x402. Reads free.
5 tools: 1 can delete or cancel things, 1 change things and 3 only read.
- Reads private data · 0
- Reads text others write · 0
- Can send data out · 0
- 3 findings
Anlyon alternative
2 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
5 tools
Deletes or cancels 1Claude Code: deny
deleteDelete a key from a box immediately.No findings
Why it is in this group
- The name "delete" says "delete": a word for removing or ending something.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it Delete a key from a box immediately. Free, rate limited per address. Anyone holding the box id can do this; there is no undo.
Annotations the server declares
- destructiveHint: true
- idempotentHint: true
Changes things 1Claude Code: ask
putStore a value under a key.1 finding
Why it is in this group
- The name "put" says "put": a word for a change.
Findings
- Info
The description mentions "credential".
What this check looks forMatched text
description: "...at box directly. The box id is the only credential: anyone holding it can read, list, dele..."
Description, as the server wrote it Store a value under a key. Costs $0.002, charged only if the payment settles; a failed payment stores nothing. Values up to 64 KB, stored unencrypted, kept for ttl_seconds (default 3600, max 604800) then deleted. Overwrites an existing key and bumps its seq. The write becomes visible once the payment has settled. Returns the box id, which is also what free reads need. A box is a namespace of keys. Omit it on a paid call to use your own wallet's box (the call returns its id). Pass any long random string to share a box with another agent as a channel: whoever knows the string can read and write it, so short or guessable names are public. Pass a box_... id returned by an earlier call to address that box directly. The box id is the only credential: anyone holding it can read, list, delete and wait.
Annotations the server declares
- title: Put
- idempotentHint: true
Only reads 3Show 3 read-only tools
getRead a key.1 finding
Why it is in this group
- The name "get" says "get": a word for reading.
Findings
- Info
The description mentions "credential".
What this check looks forMatched text
description: "...at box directly. The box id is the only credential: anyone holding it can read, list, dele..."
Description, as the server wrote it Read a key. Free, no payment or identity needed, rate limited per address. Needs the box: a box_... id from put, or a channel name. Returns value null with found false if absent or expired. A box is a namespace of keys. Omit it on a paid call to use your own wallet's box (the call returns its id). Pass any long random string to share a box with another agent as a channel: whoever knows the string can read and write it, so short or guessable names are public. Pass a box_... id returned by an earlier call to address that box directly. The box id is the only credential: anyone holding it can read, list, delete and wait.
Annotations the server declares
- readOnlyHint: true
listList the keys in a box with their seq, size and expiry, newest first, without values.No findings
Why it is in this group
- The name "list" says "list": a word for reading.
Description, as the server wrote it List the keys in a box with their seq, size and expiry, newest first, without values. Free, rate limited per address. Anyone holding the box id can do this.
Annotations the server declares
- readOnlyHint: true
waitBlock until a key changes, then return it.1 finding
Why it is in this group
- The name "wait" says "wait": a word for reading.
Findings
- Info
The description mentions "credential".
What this check looks forMatched text
description: "...at box directly. The box id is the only credential: anyone holding it can read, list, dele..."
Description, as the server wrote it Block until a key changes, then return it. Costs $0.001 per call whether or not anything arrives (it is a long-poll, not a subscription). Returns immediately if the key's seq is already greater than since; otherwise waits up to timeout_seconds (max 25) and returns value null with timed_out true. Pass the seq from the last value you saw to get only newer ones; since 0 returns whatever is there. This is how two agents sharing a box pass messages. A box is a namespace of keys. Omit it on a paid call to use your own wallet's box (the call returns its id). Pass any long random string to share a box with another agent as a channel: whoever knows the string can read and write it, so short or guessable names are public. Pass a box_... id returned by an earlier call to address that box directly. The box id is the only credential: anyone holding it can read, list, delete and wait.
Annotations the server declares
- title: Wait
- readOnlyHint: true
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write0
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
- Infoput
The description mentions "credential".
What this check looks forMatched text
description: "...at box directly. The box id is the only credential: anyone holding it can read, list, dele..."
- Infowait
The description mentions "credential".
What this check looks forMatched text
description: "...at box directly. The box id is the only credential: anyone holding it can read, list, dele..."
- Infoget
The description mentions "credential".
What this check looks forMatched text
description: "...at box directly. The box id is the only credential: anyone holding it can read, list, dele..."
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 0.4.1. Values in angle brackets are yours to fill in.
claude mcp add --transport http drops https://payperwork.app/drop/mcpclaude mcp add --transport http drops https://payperwork.app/drop/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__drops__wait",
"mcp__drops__get",
"mcp__drops__list"
],
"ask": [
"mcp__drops__put"
],
"deny": [
"mcp__drops__delete"
]
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as drops. Review it before you use it.
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/app.payperwork/drops/verify?hash=e2a1f986c62160eb2831ef89c7cf67a33ef84816a099f1908dc92e73e49db2cc" | jq -e '.changed == false'Pinned hash e2a1f986c621, from Nov 1, 2026, 21:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/app.payperwork/drops/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/app.payperwork/drops)Source: MCP Registry. Synced Nov 1, 2026, 21:17 UTC.