POPCORN MCP
Signed time and SHA-256 witness receipts for agents, with offline verification and x402 payment.
MCP server · by violetclaire
About
POPCORN MCP is an MCP server published by violetclaire. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs on your machine
- Secrets: 1
- Settings: 1
Requires: EVM_PRIVATE_KEY (secret)
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Package
npm @violetclaire/popcorn-mcp (@violetclaire/popcorn-mcp on npm)
- npm downloads/week: 44 (2026-10-12)
- npm downloads/month: 473 (2026-10-12)
- Latest version on npm: 0.1.3, published 2026-09-16
No known vulnerabilities in OSV for 0.1.3 (checked 2026-10-12)
npm facts come from the public npm registry (registry.npmjs.org, api.npmjs.org). Each figure is the registry's own and is never added to another. A registry that publishes no figure shows none: no number is not zero. Vulnerability records come from OSV.dev (CC BY 4.0) and concern the declared version only; a listing that declares no version gets no answer. We do not scan code.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a local MCP server: npm package
Built from what Official MCP Registry declares.
claude mcp add --env "EVM_PRIVATE_KEY=<YOUR_EVM_PRIVATE_KEY>" --transport stdio popcorn-mcp -- npx -y @violetclaire/popcorn-mcp[mcp_servers.popcorn-mcp]
command = "npx"
args = ["-y", "@violetclaire/popcorn-mcp"]
[mcp_servers.popcorn-mcp.env]
EVM_PRIVATE_KEY = "<YOUR_EVM_PRIVATE_KEY>"{
"mcpServers": {
"popcorn-mcp": {
"command": "npx",
"args": [
"-y",
"@violetclaire/popcorn-mcp"
],
"env": {
"EVM_PRIVATE_KEY": "<YOUR_EVM_PRIVATE_KEY>"
}
}
}
}Replace the values in angle brackets with your own. We show the names of the settings, never values.
Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 0.1.3 | Downloads/month (npm): 473 Downloads/week (npm): 44 Forks (GitHub): 0 Stars (GitHub): 0 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
mcp com.pcrzero/mcp
Issue signed receipts for AI agent actions; verify any receipt offline - free, no account.
-
mcp coffee.402/mcp
Trust layer for agent payments (x402, Base): verify agents, risk scores, signed escrow verdicts.
-
invinoveritas com.babyblueviper/invinoveritas
Second opinion before an irreversible agent action; signed proofs, free verify, public ledger.
-
Zero-knowledge proof validator and cryptographic locker.
-
MCP server exposing Signet cryptographic signing, verification, and content hash tools over stdio.
-
meok-ap2-mandate-mcp io.github.CSOAI-ORG/meok-ap2-mandate-mcp
MEOK Google AP2 Mandate MCP — issue + verify + revoke signed user-side spend authorisations for
-
Trust, freshness, policy, and discovery layer for public MCP servers.
-
Private signed AI task receipts with replay checks and optional validated AIPOU claims.
-
Agent-native MCP for governed commerce, x402 payments, paid capabilities, and verifiable receipts.
-
mcp io.github.txtcel/mcp
MCP server for the Txtcel Solana protocol: agents post and read undeletable on-chain messages.
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Real-time security filter for MCP tool communications. Works as a Claude Code hook to inspect all data sent to and received from MCP servers. Detects prompt injection, API key…
-
Secure MCP servers with OAuth 2.1, token introspection, dynamic client registration, and CIMD so AI agents can call your MCP tools with verified identities
-
swarmwage io.github.Swarmwage/swarmwage
Hire and pay specialized AI agents in USDC on Base. Open MCP protocol above x402.
-
MCP security gateway that wraps any MCP server with per-tool policies, Ed25519-signed decision receipts, and human approval gates. Shadow mode (default) logs every tool call…
-
Inspect, debug, and test Machine Payments Protocol (HTTP 402) endpoints directly from Claude Code. Parses spec-compliant WWW-Authenticate challenges, discovers MPP endpoints on…
Has a listing on Claude Code: claude-plugins-official (5)
-
mcp-server io.github.cap-js/mcp-server
Model Context Protocol (MCP) server for AI-assisted development of CAP applications.
-
Connect Claude to a private MCP server through an Anthropic MCP tunnel. The /create-docker-mcp-tunnel command drives the Docker Compose quickstart end to end: certificates, proxy…
-
mdk-mcp-server io.github.SAP/mdk-mcp-server
Model Context Protocol (MCP) server for AI-assisted development of MDK applications.
-
Detect an MCP server's language (Python, TypeScript or Go) and instrument it with the matching Pendo SDK so MCP tool calls flow into Pendo Agent Analytics.
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
Has a listing on Claude: knowledge-work-plugins (5)
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
-
MCP server for terminal commands, file operations, and process management
-
Search companies and contacts, enrich leads, find lookalikes, and get AI-ranked contact recommendations. Pre-built skills chain multiple ZoomInfo tools into complete B2B sales…
-
Hosted MCP server for AI-assisted Grafana Cloud observability — no local installation required.
-
The Vanta plugin connects Claude Code to Vanta's security and compliance platform through the Vanta MCP server. It combines Vanta's test-specific remediation intelligence with…
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Cloudflare platform plugin with curated skills for Workers, Wrangler, and Agents SDK plus the official Cloudflare API MCP server.
-
Install, open, and connect the signed ChatCut Desktop app from Codex.
-
CrowdStrike Falcon Foundry development skills for building cybersecurity applications on the Falcon platform. Includes UI development, collections, functions, workflows, API…
-
Comprehensive skill for the entire Temporal lifecycle — developing applications, using the Temporal CLI, running and managing Temporal Server, and working with Temporal Cloud.
-
Skills for NVIDIAs ecosystem spans GPU acceleration, CUDA, AI agents, inference, robotics, Physical AI, Omniverse, and simulation. This plugin helps you understand the pieces…
Has a listing on Community GitHub marketplaces (5)
-
Your agent asks humans on Salt and gets answers: messages, tap-to-answer cards, invoices.
-
WhatsApp MCP. SQLCipher-encrypted, scrubber-CI-gated, draft-and-confirm sends, voice transcription.
-
4da-mcp-server io.github.4DA-Systems/4da-mcp-server
Upgrade intelligence for AI agents: what an upgrade changes, where it touches your code, CVE scans.
-
Multi-workspace Slack MCP server with draft+confirm safety, vault auto-export, a
Multi-workspace Slack MCP server with draft+confirm safety, vault auto-export, and triple-mode…
-
HTTP/REST client with saved collections, env secrets, and SSRF-safe host allowlisting.
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Complete toolkit for building Model Context Protocol (MCP) servers in Go using the official github.com/modelcontextprotocol/go-sdk. Includes instructions for best practices, a…
-
Complete toolkit for building Model Context Protocol (MCP) servers in TypeScript/Node.js using the official SDK. Includes instructions for best practices, a prompt for generating…
-
Complete toolkit for building Model Context Protocol (MCP) servers in Kotlin using the official io.modelcontextprotocol:kotlin-sdk library. Includes instructions for best…
-
Safe BLE diagnostics, evidence workflows, and guarded automation for AI agents.
-
Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
mcp-apps
Generate MCP App widgets for MCP tools. Produces self-contained HTML widgets using the MCP Apps protocol.
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
Build Power Apps Canvas Apps using the Canvas Authoring MCP server.
-
Advanced Security plugin for GitHub Copilot.
-
model-apps
Build and deploy Power Apps generative pages for model-driven apps with specialist agents for planning, entity creation, and parallel code generation. Requires PAC CLI >= 2.7.0…
Has a listing on Cursor: cursor/plugins (5)
-
Build apps, scripts, and automations with the TypeScript SDK.
-
Fan large tasks out across parallel cloud agents with planners, workers, verifiers, and structured handoffs.
-
CLI-backed repo compatibility scans plus agents that audit startup, validation, and docs against reality.
-
Scaffold and validate new agent plugins.
-
Manage envelopes, templates, workflows, and agreements.
Has a listing on Docker MCP Catalog (5)
-
Access to Rube's catalog of remote MCP servers.
-
A unified MCP proxy that aggregates multiple MCP servers into one interface, enabling seamless tool discovery and management across all your AI interactions. Manage all your MCP…
-
Give your AI agents trusted access to the full Postman platform.
-
VeyraX MCP is the only connection you need to access all your tools in any MCP-compatible environment.
-
Dynatrace-mcp io.github.dynatrace-oss/Dynatrace-mcp
[DEPRECATED] Dynatrace MCP Server. Migrate to dynatrace-for-ai or Dynatrace Remote MCP Server.
Has a listing on Official MCP Registry (5)
-
mcp com.pcrzero/mcp
Issue signed receipts for AI agent actions; verify any receipt offline - free, no account.
-
mcp coffee.402/mcp
Trust layer for agent payments (x402, Base): verify agents, risk scores, signed escrow verdicts.
-
invinoveritas com.babyblueviper/invinoveritas
Second opinion before an irreversible agent action; signed proofs, free verify, public ledger.
-
Zero-knowledge proof validator and cryptographic locker.
-
MCP server exposing Signet cryptographic signing, verification, and content hash tools over stdio.
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.