RPP402 protocol source of truth: JSON Schemas and TypeScript types for the six v1 primitives (Discovery, Quote, Commerce Session, Payment Intent, Settlement, Receipt).

Accord Protocol core SDK — canonicalize, hash, validate Agreement / Verification Receipt / Settlement Receipt v0 objects. Rail-agnostic. See specs/ACCORD-000-overview.md.

x402 Payment Protocol Extensions

Command-line client for Agora, a decentralized bounty marketplace for science. Lets Posters, Solvers, and Guardians interact with Agora's public API and on-chain contracts.

Accord rail adapter for the Ergo Note primitive. verifyPayment fetches the Note from the chain, checks expiry / reserve binding / task-hash / value; settle calls redeemNote and emits a v0 Settlement Receipt with mode=note_redeemed.

Accord rail adapter for the Base / EVM Note primitive (AgentPayReserveV0). verifyPayment fetches the Note from the Solidity contract, checks expiry / receiver binding / task-hash / value; settle calls redeemNote and emits a v0 Settlement Receipt with mode

Markdown for receipts. Printable digital receipts. Generate receipt printer commands and images.

All terminology and labels used in AgentGuard materials are descriptive of software functionality only, not legal definitions or guarantees of compliance. Terms like receipt, audit log, evidence, audit trail, and attestation refer solely to cryptographica

Create a set of commands that can be send to any receipt printer that supports ESC/POS, StarLine or StarPRNT

Moesi executable — `moesi plan` (state diff) and `moesi apply` (browser-bridged signing).

Agent workflow diagnostics and capability routing over MCP with x402 settlement on Base

Haia Trace command-line interface and renderers.

MermaidJS plugin for ZenUML integration

A Node.js module for Apple In-App-Purchase receipt validation for iOS

TypeScript definitions for node-apple-receipt-verify

Relay protocol SDK

Fork of react-native-thermal-receipt-printer. A React Native Library to support USB/BLE/Net printer

A custom implementation of ethereumjs receipt-manager

Receipt and escrow state machine for Vallum.

This is an library that allows you to print to a Bluetooth connected receipt printer using WebBluetooth.