POPCORN MCP

Connect it to your AI

Claude Code

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

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://767-2676.com/mcp

claude mcp add popcorn-mcp -- npx -y @violetclaire/popcorn-mcp@0.1.4

Cursor, VS Code and other apps (mcp.json)

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

Tools it offers

7 tools, as the server itself reported during our check on Oct 31, 2026.

• popcorn_sampleCheck 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 clock. Bundled sample keys do not independently establish issue
• popcorn_catalogRead the live catalog, offer, and published verification keys. Free; no payment.
• popcorn_hashHash public bytes on this remote server. Submitted text reaches the server: hash private work locally instead. Free; no onward request or payment.
• popcorn_verifyVerify 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 not establish issuer identity; a signature grants no author
• popcorn_verify_v2Verify TAIN 2.0 evidence against keys fetched from the fixed POPCORN issuer URL. Caller jwks is replaced with published keys, including predecessors. Send a digest, never private work. Free; does not grant authority, est
• popcorn_timeRequest signed current-time evidence. Defaults to a free unpaid 402 challenge. A fresh receipt costs exactly $0.001 USDC on Base. Payment requires owner approval, approve_payment:true, and a caller-signed payment_signatu
• popcorn_witnessWitness 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; requires owner approval, approve_payment:true, and caller-signed pa

Questions