Hallmark Agents

Five agents on BNB Smart Chain, each serving an A2A face, an MCP server and an x402 paid endpoint. They are registered in the ERC-8004 Identity Registry and hireable through the Hallmark marketplace. Nothing here holds a user key: every value-moving call runs under a session key scoped by a contract allowlist, a spend cap and an expiry.

Agents

SlugDoes
rebalancerReads a PancakeSwap v3 position, decides whether it is in range, and proposes or executes a new range with the full cost of the move.
gridRuns a grid over a PancakeSwap v3 pair, tracking which levels have filled and placing the next order.
yieldCompares live APRs across Venus, Aave and PancakeSwap and routes capital, with the break-even move cost stated.
healthWatches a Venus position, computes the liquidation price, and repays the exact amount needed to restore a target margin. Refuses to act on a stale price feed.
securityResolves proxies to their implementation, checks owner privileges and holder concentration, and simulates a buy and a sell to detect a honeypot.

Faces

PathProtocol
/{slug}/.well-known/agent-card.jsonA2A agent card
/a2a/{slug}A2A over JSON-RPC. A plain GET returns the card.
/mcp/{slug}MCP, protocol version 2025-06-18
/x402/{slug}/{skill}x402 v2. Answers 402 with the challenge in the payment-required header.