MCP server

POPCORN Witness Verifier

io.github.violetclaire/popcorn-tain-verifier

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

MCP server for verifying receipts: POPCORN-WITNESS/2.0 signature, digest, and time. Free, read only.

Working at last checkAbout 1,740 tokens per request once connected1 tools

Website Source

https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 1
Token cost: About 1,740 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http popcorn-tain-verifier https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.popcorn-tain-verifier]
url = "https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"popcorn-tain-verifier":{"httpUrl":"https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"popcorn-tain-verifier":{"url":"https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp"}}}

VS Code

{"servers":{"popcorn-tain-verifier":{"type":"http","url":"https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp"}}}

Antigravity

agy mcp add popcorn-tain-verifier https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"popcorn-tain-verifier","server_url":"https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"popcorn-tain-verifier","server_url":"https://popcorn-tain-verify-mcp-v2.violetherod.workers.dev/mcp"}

Tools

popcorn_verify_v2 ~1740 tokens
Verify a POPCORN-WITNESS/2.0 receipt against a caller-computed SHA-256 payload digest, nonce, and independently trusted issuer keys. Send only the digest, never private payload bytes. Caller-supplied keys do not establish issuer identity. This does not prove on-chain settlement, establish current ti

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