feat(agentkit): Add WalletPrintActionProvider for behavioral transaction risk scoring

[Loai17]

Summary

This PR adds a native WalletPrintActionProvider for WalletPrint — an open-source behavioral transaction risk scoring SDK for AI agent wallets.

What it does

Before an agent signs a transaction, it can call score_transaction to check whether the recipient, amount, asset, or timing looks unusual relative to that wallet's own behavioral history. The action returns a risk score (0–100), a band (low / medium / high), plain-English reason codes, and a recommended action (proceed / review / escalate).

This action is advisory only — it never blocks a transaction. The agent decides what to do with the result.

Changes

• src/action-providers/walletprint/walletprintActionProvider.ts — WalletPrintActionProvider class with score_transaction action
• src/action-providers/walletprint/schemas.ts — Zod schema for transaction inputs
• src/action-providers/walletprint/index.ts — re-exports
• src/action-providers/walletprint/README.md — usage docs
• src/action-providers/walletprint/walletprintActionProvider.test.ts — 12 unit tests (all passing)
• src/action-providers/index.ts — wired into main exports
• .changeset/add-walletprint-action-provider.md — patch changeset

Supported networks

Ethereum mainnet (chain ID 1) and Base (chain ID 8453).

Usage

import { walletprintActionProvider } from "@coinbase/agentkit";

const agentKit = await AgentKit.from({
  walletProvider,
  actionProviders: [
    walletprintActionProvider({ apiKey: "your-api-key" }),
  ],
});

Use walletprint-dev-key as the API key for sandbox testing.

Links

• GitHub: https://github.com/Loai17/walletprint-sdk
• npm: https://www.npmjs.com/package/@walletprint/sdk
• API: https://walletprint.up.railway.app
• 1,000+ downloads in first 7 days

Test plan

• npx jest --testPathPattern=walletprint — 12/12 tests pass
• Manual: instantiate walletprintActionProvider({ apiKey: "walletprint-dev-key" }) and call score_transaction against the sandbox API

[cb-heimdall]

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