POPCORN MCP
Witness layer for agents: signed receipts binding a fingerprint to a witnessed time. $0.001.
Connect it
Settings → Connectors → Add custom connector
URL: https://767-2676.com/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://767-2676.com/mcp{
"mcpServers": {
"popcorn-mcp": {
"url": "https://767-2676.com/mcp"
}
}
}claude mcp add --transport http popcorn-mcp https://767-2676.com/mcp{
"servers": {
"popcorn-mcp": {
"type": "http",
"url": "https://767-2676.com/mcp"
}
}
}{
"mcpServers": {
"popcorn-mcp": {
"command": "npx",
"args": [
"-y",
"@violetclaire/popcorn-mcp@0.1.4"
],
"env": {
"EVM_PRIVATE_KEY": "<value>"
}
}
}
}claude mcp add popcorn-mcp -- npx -y @violetclaire/popcorn-mcp@0.1.47 tools, pulled live
popcorn_sampleread-onlyCheck 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 issuer identity.
popcorn_catalogread-onlyRead the live catalog, offer, and published verification keys. Free; no payment.
popcorn_hashread-onlyHash public bytes on this remote server. Submitted text reaches the server: hash private work locally instead. Free; no onward request or payment.
popcorn_verifyread-onlyVerify 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 authority.
popcorn_verify_v2read-onlyVerify 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, establish current time, or verify settlement on chain.
popcorn_timecan modifyRequest 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_signature. No server wallet or private key. No automatic retry. Verify evidence and account for client round-trip time before a deadline decision.
popcorn_witnesscan modifyWitness 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 payment_signature. Keep work and wallet keys local. No automatic retry. Evidence does not authorize or prove execution of an action.
Change history
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