CAD042: x402 Protocol

CAD

Implements the HTTP 402 payment protocol over CVM and CAD29 tokens — APIs can gate access per request with a header-level payment, no OAuth, accounts or invoicing. Micropayments for agents and APIs without the Stripe detour.

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CAD019: Asset Model Convex Architecture Documents One polymorphic asset/transfer that accepts fungible tokens, NFT sets, derivative contracts and asset types not yet invented — generic contracts can handle anything ownable. Replaces the ERC-20/721/1155/4626 zoo with a single universal SPI.
CAD029: Fungible Token Standard Convex Architecture Documents The CAD19-conformant replacement for ERC-20/ERC-777 — integer balances, decimals, mint/burn, all accessible through the universal asset API rather than duplicated interface boilerplate. Writing a new token is defining the rules, not re-implementing transfer.
CAD031: NFT Metadata Convex Architecture Documents Puts NFT metadata on-chain as native CVM maps (JSON-compatible, per-NFT, optionally generated dynamically) instead of relying on off-chain IPFS URLs that rot. Fixes the chronic ERC-721 problem where NFT art disappears because someone stopped pinning.
CAD035: Lattice Cursors Convex Architecture Documents A thin mutable pointer layer over immutable lattice values — applications get atomic compareAndSet, updateAndGet, nested navigation, and sync/fork, while the underlying Merkle DAG stays pure. This is how applications use CRDT data without thinking about CRDT merges.
CAD041: Model Context Protocol Convex Architecture Documents Exposes peer capabilities (queries, transactions, watches, signing) as Model Context Protocol tools at /mcp with SSE streaming — so any MCP-aware LLM can transact, read state and subscribe to changes with no bespoke adapter. Convex becomes an economic substrate AI agents speak natively.
CAD044: JSON on the Lattice Convex Architecture Documents JSON is a strict subset of CVM types, so any JSON payload rides through the CVM and the lattice with zero adaptation — keywords map to strings, maps to objects, vectors to arrays. Web APIs and existing JSON tooling work unchanged, removing the usual serialisation wall between web and chain.

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