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Autonomous Agent Skills

CornerStone MCP x402 skill for agents. Tools for stock predictions, backtests, bank linking, and agent/borrower scores. Payment-protected MCP tools (run_prediction, run_backtest, link_bank_account, get_agent_reputation_score, get_borrower_score, by-email variants) with x402 flow (Aptos + Base). Skill handles 402 → pay → retry. Wallet attestation for onboarding. For marketplaces where agents download and use skills autonomously.

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Requirements

Target platform: OpenClaw
Install method: Manual import
Extraction: Extract archive
Prerequisites: OpenClaw
Primary doc: SKILL.md

Package facts

Download mode: Yavira redirect
Package format: ZIP package
Source platform: Tencent SkillHub
What's included: LICENSE.md, package-lock.json, package.json, README.md, SKILL.md, src/attest-aptos-wallet.js

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I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Then review README.md for any prerequisites, environment setup, or post-install checks. Tell me what you changed and call out any manual steps you could not complete.

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Release facts

Source: Tencent SkillHub
Verification: Indexed source record
Version: 2.1.1

Provenance

Publisher: Josephrp
Source page: View original listing
Canonical URL: Open canonical page

Documentation

ClawHub primary doc Primary doc: SKILL.md 11 sections Open source page

CornerStone MCP x402 Skill (for Agents)

This skill gives you (the agent) a set of tools to: create and manage Aptos and EVM wallets, check balances, and call x402-paid MCP tools (stock prediction, backtest, bank linking, agent/borrower scores). Payment is automatic — when a paid tool returns 402, the skill signs, verifies, settles, and retries transparently. You just call the tool; the result comes back.

Quick-start workflow

Follow this sequence on first use, then skip to the tool you need: Check wallets → call get_wallet_addresses (no args). If empty → call create_aptos_wallet then create_evm_wallet. Fund → call credit_aptos_wallet (Aptos faucet) and fund_evm_wallet (EVM faucet instructions). Tell the user to whitelist the returned addresses at https://arnstein.ch/flow.html. Check balance → call balance_aptos (must have USDC for predictions/backtests) and/or balance_evm (must have ETH for bank linking). Use paid tools → run_prediction, run_backtest, link_bank_account, or score tools. Important: Paid tools will fail with a wallet/whitelist error if the address has not been funded and whitelisted. Always verify wallets and balances first.

Wallet management tools (local)

get_wallet_addresses Args: none Returns: { aptos: [{ address, network }], evm: [{ address, network }] } — may be empty arrays. When to use: Always call first before any wallet or paid tool action. Determines what exists. Decision: If both arrays are empty → create wallets. If only one is empty → create the missing one. If both have entries → proceed to balance check or paid tools. create_aptos_wallet Args: { force?: boolean, network?: "testnet" | "mainnet" } — defaults: force=false, network=testnet. Returns: { success, address, network, message } or { success: false, message, addresses } if wallet exists and force=false. When to use: When get_wallet_addresses returns empty aptos array, or user requests a new wallet. Error handling: If success: false and wallet already exists, either use the existing wallet or retry with force: true to add another. create_evm_wallet Args: { force?: boolean, network?: "testnet" | "mainnet" } — defaults: force=false, network=testnet. Returns: { success, address, network, message } or { success: false, message, addresses }. Same pattern as create_aptos_wallet. credit_aptos_wallet Args: { amount_octas?: number } — default 100,000,000 (= 1 APT). Returns on devnet: { success: true, address } (programmatic faucet funded). Returns on testnet: { success: true, address, faucet_url } (instructions only; no programmatic faucet). Prerequisite: Aptos wallet must exist (create_aptos_wallet first). Note: Funded APT is for gas; tools pay in USDC (~6¢). The user may need to acquire testnet USDC separately. fund_evm_wallet Args: none Returns: { success: true, address, faucet_url, message } (manual funding instructions). Prerequisite: EVM wallet must exist (create_evm_wallet first). Note: Returns a Base Sepolia faucet URL. The user must fund manually; there is no programmatic faucet.

Balance tools (local)

balance_aptos Args: none Returns: { address, balances: { usdc, apt } } or { error }. When to use: Before calling run_prediction, run_backtest, or score tools to confirm sufficient USDC. balance_evm Args: { chain?: string } — default "base". Supported: base, baseSepolia, ethereum, polygon, arbitrum, optimism. Returns: { address, chain, balance, symbol } or { error }. When to use: Before calling link_bank_account to confirm sufficient ETH on Base Sepolia. Note: For testnet tools, use chain: "baseSepolia".

Paid MCP tools (x402 — payment handled automatically)

All paid tools accept both Aptos and EVM payment. The skill picks the best option or follows PREFERRED_PAYMENT_ORDER. You never see 402 errors — just call the tool and get the result or an error message. run_prediction Args: { symbol: string, horizon?: number } — symbol is a stock ticker (e.g. "AAPL"), horizon is days (default 30). Returns: Prediction result object (forecast data, confidence intervals, etc.) or { error }. Cost: ~6¢ USDC (Aptos or EVM). Prerequisite: Funded + whitelisted Aptos or EVM wallet. Example call: run_prediction({ symbol: "AAPL", horizon: 30 }) run_backtest Args: { symbol: string, startDate?: string, endDate?: string, strategy?: string } — dates in "YYYY-MM-DD", strategy defaults to "chronos". Returns: Backtest result (returns, drawdown, sharpe, etc.) or { error }. Cost: ~6¢ USDC. Example call: run_backtest({ symbol: "TSLA", startDate: "2024-01-01", endDate: "2024-12-31", strategy: "chronos" }) link_bank_account Args: none Returns: { link_token } or account ID for Plaid bank linking, or { error }. Cost: ~5¢ (EVM/Base). Prerequisite: Funded + whitelisted EVM wallet (Base Sepolia for testnet). get_agent_reputation_score Args: { agent_address?: string, payer_wallet?: string } — both optional; uses the configured wallet if omitted. Returns: { reputation_score: number } (e.g. 100) or 403 if not allowlisted, or { error }. Cost: ~6¢ via x402, or free with lender credits (pass payer_wallet). get_borrower_score Args: { agent_address?: string, payer_wallet?: string } — same pattern. Returns: { score: number } (100 base; higher with bank linked) or { error }. Cost: ~6¢ via x402, or free with lender credits. get_agent_reputation_score_by_email Args: { email: string, payer_wallet?: string } — resolves email to allowlisted agent. Returns: { reputation_score: number } or { error }. Prerequisite: SCORE_BY_EMAIL_ENABLED must be set on the server. Higher fee. get_borrower_score_by_email Args: { email: string, payer_wallet?: string } — same pattern. Returns: { score: number } or { error }. Prerequisite: SCORE_BY_EMAIL_ENABLED must be set on the server. Higher fee.

"Run a prediction for X"

get_wallet_addresses → aptos empty? → create_aptos_wallet → credit_aptos_wallet → tell user to whitelist → aptos exists? → balance_aptos → has USDC? → run_prediction({ symbol: "X", horizon: 30 }) → no USDC? → tell user to fund USDC, provide address

"Link a bank account"

get_wallet_addresses → evm empty? → create_evm_wallet → fund_evm_wallet → tell user to whitelist → evm exists? → balance_evm({ chain: "baseSepolia" }) → has ETH? → link_bank_account → no ETH? → fund_evm_wallet (returns faucet URL)

"Get my scores"

get_wallet_addresses → has aptos or evm? → get_agent_reputation_score + get_borrower_score → neither? → create wallets first, whitelist, then query

Error handling

Error patternMeaningWhat to do"No Aptos wallet"Wallet file missingCall create_aptos_wallet"No EVM wallet"Wallet file missingCall create_evm_wallet"already exist. Use force: true"Wallet exists, not overwritingUse existing wallet, or pass force: true to add another"Payment verification failed"Insufficient funds or wrong assetCheck balance; tell user to fund the wallet"No Aptos wallet configured" / "No EVM wallet configured"Paid tool needs wallet that doesn't existCreate the missing wallet type"Unsupported chain"Invalid chain name for balance_evmUse one of: base, baseSepolia, ethereum, polygon, arbitrum, optimism"timed out after 300s"MCP call took too longRetry once; the server may be under load"403" or "not allowlisted"Wallet not whitelistedTell user to whitelist address at https://arnstein.ch/flow.html

Setup (for the human installing this skill)

Install: npm install from repo root. Copy .env.example to .env. Configure: Set wallet paths (APTOS_WALLET_PATH, EVM_WALLET_PATH or EVM_PRIVATE_KEY). Wallets: Create via tools (create_aptos_wallet, create_evm_wallet) or CLI (node src/setup-aptos.js, node src/setup.js). Fund and whitelist all addresses at https://arnstein.ch/flow.html.

CLI commands (from repo root)

TaskCommandGenerate Aptos walletnpm run setup:aptosGenerate EVM walletnpm run setupShow addresses for whitelistnpm run addressesCredit Aptos (devnet)npm run credit:aptos (set APTOS_FAUCET_NETWORK=devnet)EVM balancenpm run balance -- <chain>Transfer ETH/tokensnpm run transfer -- <chain> <to> <amount> [tokenAddress]Swap tokens (Odos)npm run swap -- <chain> <fromToken> <toToken> <amount>Run skill demonpx cornerstone-agent "Run a 30-day prediction for AAPL"Attest Aptos walletnpm run attest:aptosAttest EVM walletnpm run attest:evm Source: FinTechTonic/autonomous-agent

Category context

Code helpers, APIs, CLIs, browser automation, testing, and developer operations.

Source: Tencent SkillHub

Largest current source with strong distribution and engagement signals.

Package contents

Included in package

3 Docs2 Config1 Scripts

SKILL.md Primary doc
LICENSE.md Docs
README.md Docs
src/attest-aptos-wallet.js Scripts
package-lock.json Config
package.json Config