query-blockchain-data

research.deprecation-usage — an installable skill for AI agents, published by coinbase/cds.

Discover and call paid APIs using the X402 payment protocol with automatic USDC payments on Base. Search a bazaar of paid services by keyword, list all available resources, or inspect an endpoint's price and requirements without paying Make authenticated requests to X402 endpoints with automatic USDC payment in atomic units, supporting GET, POST, PUT, DELETE, and PATCH methods Includes query parameters, custom headers, request body support, and max-amount spending limits to control payment...

Reviews already-written Coinbase Design System (CDS) UI for accessibility: verifying documented accessibility props (e.g. accessibilityLabel,…

Perform the following operations only once per session, after the skill is activated.

Crypto wallet operations via the awal CLI — sign in, check balances, send USDC/ETH/POL/SOL, trade tokens, fund the wallet, and use the x402 payment protocol to…

Email OTP-based wallet authentication with validation and status checking. Two-step login flow: initiate with email to receive a 6-digit OTP, then verify with the flowId and code to complete authentication Includes input validation rules for email, flowId, and OTP to prevent shell injection before executing commands Provides status checking, balance queries, address retrieval, and wallet window access via companion CLI commands All commands support --json output for machine-readable...

Deposit USDC to wallet via Coinbase Onramp or direct transfer. Opens a companion UI where users select preset amounts ($10, $20, $50) or custom values and choose from Apple Pay, debit card, bank transfer, or Coinbase account funding Supports multiple payment methods with varying settlement times: instant for card and Apple Pay, 1–3 days for ACH bank transfers Deposits funds as USDC on the Base network; alternatively, users can send USDC directly to the wallet address via npx awal@2.0.3...

Deploy a paid API endpoint that other agents can discover and pay for via x402 protocol. Charges USDC per request on Base using HTTP 402 payment protocol; clients pay with signed transactions, no API keys or accounts required Automatically registers endpoints with the x402 Bazaar for agent discovery when you declare discovery extensions Supports multiple pricing tiers, wildcard routes, and multiple payment options per endpoint using Express middleware Built on @x402/express and @x402/core...