Cross-Asset Intelligence

Cross-asset financial analysis API combining crypto and traditional markets. BTC vs S&P500/NASDAQ/Nikkei225/DAX correlation, cross-market risk score (0-100),...

Security Scan

The skill's functionality (paid API calls via on-chain micropayments) could justify asking for a wallet signing key, but the SKILL.md and registry metadata are inconsistent and asking the agent to hold a private key and auto-pay per request raises clear risk (possible unauthorized or silent spending).

Purpose & Capability

The skill claims to provide paid cross-asset analysis via an x402 micropayment API. Requesting a wallet private key to sign micropayments is technically coherent with that purpose, but the registry metadata lists no required env vars or primary credential while SKILL.md explicitly instructs storing WALLET_SIGNING_KEY — an inconsistency in declared vs. actual requirements.

Instruction Scope

The runtime instructions tell the agent to automatically pay per request using a wallet private key and to make HTTP GET calls to an external endpoint (https://x402.bankr.bot/...). That grants the skill the ability to trigger external network calls that will consume funds whenever invoked. The SKILL.md does not provide controls or limits the agent should apply (e.g., spend caps, explicit user confirmation per payment), increasing the risk of unintended charges.

Install Mechanism

This is an instruction-only skill with no install spec and no code files; nothing is written to disk and no packages are pulled in by an installer, which minimizes supply-chain risk.

Credentials

SKILL.md requires a single highly sensitive secret (WALLET_SIGNING_KEY, a 32-byte private key). That is proportionate to an API design that signs on-chain micropayments, but the manifest did not declare this credential (primaryEnv is absent). Storing a raw private key in an env var is risky; if the agent or any component makes requests autonomously, that key could be used to drain funds. The skill's guidance to use a dedicated limited-funds wallet is appropriate but optional and unenforced.

Persistence & Privilege

The skill is not 'always' included, but model invocation is allowed (platform default). Combined with an agent-held wallet key and automatic per-request payments, autonomous invocation increases blast radius: the agent could make repeated paid requests without explicit user confirmation. The skill does not instruct explicit spend limits, user prompts, or rate-limiting.

What to consider before installing

Before installing: (1) Confirm the registry metadata is corrected to declare WALLET_SIGNING_KEY (ask the author why it was omitted). (2) Do NOT supply your main wallet private key — create a dedicated wallet with a small capped balance for this skill. (3) Prefer signing flows that use an external signer or constrained approvals rather than plaintext private keys in env vars; avoid storing keys in unencrypted .env files. (4) Ask the author how payments are signed, whether the service can request/execute payments without explicit user confirmation, and whether there are spend caps or per-call confirmation options. (5) If you cannot verify the endpoint operator (x402.bankr.bot) and audit the payment flow, avoid giving the agent any private key or running this skill autonomously.

Cross-Asset Intelligence API

AI-powered cross-market financial analysis. Crypto + traditional finance in one API.

What This Skill Does

Connects your agent to 22 paid analysis endpoints spanning 6 domains:

1. BTC-Equity Correlation — Pearson correlation between BTC and stock indices
2. Cross-Market Risk Score — Composite 0-100 score from BTC volatility, VIX, bonds, macro
3. Crypto News Impact — Top 3 market-moving stories ranked by impact
4. Macro Environment — Fed rate, CPI, unemployment, GDP, yields with AI analysis
5. Token Safety — SAFE/CAUTION/DANGER verdict for any ERC-20 contract
6. Daily Briefing — All-in-one cross-asset market snapshot

Payment

All endpoints use x402 micropayments (USDC on Base). Your agent's wallet pays automatically per request. No API key, no subscription, no signup.

Tier	Price Range	AI Model	Speed
quick	$0.001-0.002	None (pure math)	<500ms
insight	$0.03-0.06	Claude Haiku	<5s
analysis	$0.08-0.20	Claude Sonnet	<10s
pro	$0.80-1.00	Claude Opus	cached 2h

Setup

Your agent needs a funded wallet (USDC on Base). Set your wallet's private key as an environment variable:

• Variable name: WALLET_SIGNING_KEY
• Format: hex (32-byte private key)
• Recommended: Use a dedicated agent wallet with limited funds — not your main wallet

Store the value in .env (gitignored) or a secret manager. Never share or commit it.

Usage

All endpoints are accessible via HTTP GET through Bankr x402 Cloud:

Base URL: https://x402.bankr.bot/0x98ee945dfa6bb8e9ed9f9b6ae56eb82bcc82f0aa/

Quick examples

# BTC vs S&P500 correlation (30 days)
GET /correlation-quick?index=sp500&period_days=30

# Cross-market risk score
GET /risk-score-quick

# Token safety check
GET /token-safety-quick?chain=ethereum&address=0x...

# Daily market briefing
GET /daily-briefing-quick

# With AI analysis (Claude Sonnet)
GET /correlation-analysis?index=nasdaq&period_days=90&lang=ja

Available endpoints

Correlation: correlation-quick, correlation-insight, correlation-analysis, correlation-pro

• Params: index (sp500/nasdaq/nikkei225/dax), period_days (7/14/30/90), lang (en/ja)

Risk Score: risk-score-quick, risk-score-insight, risk-score-analysis, risk-score-pro

• Params: lang (en/ja)

Top News: top-news-insight, top-news-analysis, top-news-pro

• Params: lang (en/ja)

Macro Report: macro-report-insight, macro-report-analysis, macro-report-pro

• Params: lang (en/ja)

Token Safety: token-safety-quick, token-safety-insight, token-safety-analysis, token-safety-pro

• Params: chain (ethereum/base/etc), address (contract address), lang (en/ja)

Daily Briefing: daily-briefing-quick, daily-briefing-insight, daily-briefing-analysis, daily-briefing-pro

• Params: lang (en/ja)

Response Format

All responses include:

• Core analysis data (correlation coefficients, risk scores, news items, etc.)
• upgrade_available — links to higher-tier analysis with pricing
• meta.data_sources — transparency on where data comes from
• meta.data_freshness — timestamp of underlying data
• disclaimer — not financial advice

Why This Over Raw Data APIs

• Cross-asset analysis — BTC vs stock indices, not just crypto or just stocks
• AI judgment included — not raw numbers, but interpreted analysis
• 4 pricing tiers — from $0.001 machine-readable data to $0.80 institutional reports
• x402 native — no API key dance, just pay and get data
• Bilingual — English and Japanese output

Differentiators

• Only x402 API offering crypto × traditional finance cross-asset AI analysis
• Historical data analysis capabilities expanding
• Claude Opus institutional-grade reports at pro tier
• Sub-second quick tier for automated monitoring and alerts

Security & Privacy

This skill contains no executable code. It is a pure markdown description of an external API. All data processing happens server-side on secured infrastructure. No local files are read, written, or executed.