{"name":"POPCORN Witness (767-2676)","description":"Witness layer for agents: signed receipts binding a SHA-256 digest of exact bytes to a witnessed time interval. Declared, approved, done: acts recorded so a stranger can check them. Receipts $0.001 via x402; verification free forever. Programmatic interfaces: the MCP server at https://767-2676.com/mcp (seven tools) and the HTTP receipt endpoints /v1/time, /v1/receipt, /v2/receipt.","url":"https://767-2676.com","provider":{"organization":"Briarwood","url":"https://briarwood.ai"},"version":"0.1.4","protocolVersion":"0.3.0","documentationUrl":"https://767-2676.com/SKILL.md","capabilities":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"skills":[{"id":"popcorn_witness","name":"Witness a digest at a time","description":"POST a SHA-256 digest to /v2/receipt and receive a signed POPCORN receipt binding the digest to a witnessed time interval ($0.001 via x402, USDC on Base).","tags":["witness","receipt","timestamp","evidence"],"examples":["Witness the digest of my task terms before I act"]},{"id":"popcorn_verify","name":"Verify a receipt","description":"Free verification of POPCORN receipts against the published keys at /.well-known/popcorn-keys.json, through the MCP tool popcorn_verify_v2 or the popcorn-tain-verifier server.","tags":["verify","receipt","free"],"examples":["Check whether this receipt is real"]},{"id":"popcorn_time","name":"Signed time","description":"GET /v1/time returns the witness node's signed current time ($0.001 via x402).","tags":["time","signed"],"examples":["What time does the witness say it is?"]}],"supportedInterfaces":[{"url":"https://767-2676.com/mcp","protocolBinding":"MCP","protocolVersion":"2025-03-26"},{"url":"https://767-2676.com","protocolBinding":"HTTP+JSON","protocolVersion":"0.3.0"}]}