io.github.violetclaire/popcorn-mcp

up checked 2026-11-11T15:38:02.534Z

Unclaimed · Unverified

Publisher-provided title

POPCORN MCP

Publisher-provided description

Witness layer for agents: signed receipts binding a fingerprint to a witnessed time. $0.001.

Summary by lookupd

Issues signed time and witness receipts binding digests to timestamps, with hashing and receipt verification tools; paid receipts cost…

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http popcorn https://767-2676.com/mcp

Claude Code, npm package (stdio)

claude mcp add popcorn -- npx -y @violetclaire/popcorn-mcp

Codex, remote (streamable-http)

codex mcp add popcorn --url https://767-2676.com/mcp

Codex, npm package (stdio)

codex mcp add popcorn -- npx -y @violetclaire/popcorn-mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "popcorn": {
      "url": "https://767-2676.com/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "popcorn": {
      "command": "npx",
      "args": [
        "-y",
        "@violetclaire/popcorn-mcp"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Publisher-provided text

popcorn_sample Check the public October 14 TAIN 2.0 receipt and a changed-digest control. No inputs, wallet, payment, or outbound request. Historical evidence, not a fresh clo
popcorn_catalog Read the live catalog, offer, and published verification keys. Free; no payment.
popcorn_hash Hash public bytes on this remote server. Submitted text reaches the server: hash private work locally instead. Free; no onward request or payment.
popcorn_verify Verify a time or witness receipt using caller-trusted JWKS and expected values. Digest-only for witness payloads. No outbound request or payment. Caller keys do
popcorn_verify_v2 Verify TAIN 2.0 evidence against keys fetched from the fixed POPCORN issuer URL. Caller jwks is replaced with published keys, including predecessors. Send a dig
popcorn_time Request signed current-time evidence. Defaults to a free unpaid 402 challenge. A fresh receipt costs exactly $0.001 USDC on Base. Payment requires owner approva
popcorn_witness Witness a SHA-256 digest and fresh caller nonce at a time. Defaults to a free unpaid 402 challenge. One fresh receipt costs exactly $0.001 USDC on Base; require

Shows this live status and links here; updates hourly.

[![lookupd status](https://lookupd.com/badge/io.github.violetclaire/popcorn-mcp.svg)](https://lookupd.com/servers/io.github.violetclaire/popcorn-mcp)