What problem does it solve? Agents often hit walls when a task requires live data, paid APIs, or services behind paywalls, rate limits, or API-key signup flows. This Skill lets an agent discover paid HTTP endpoints in the Circle services marketplace and pay per call in USDC via the x402 protocol, with no API keys, accounts, or prefunded billing. ## Core Features & Use Cases - Marketplace Discovery: Search the Circle services marketplace by keyword (circle services search) to find paid endpoints for crypto prices, prediction-market odds, web search, weather, sports stats, academic research, and communication APIs. - Inspect Before Paying: Confirm price, accepted chains, payment scheme (Gateway vs vanilla x402), and request schema with circle services inspect or a raw 402 probe before any funds move. - USDC Payment Execution: Settle per-call payments with circle services pay, including cost estimates, per-call spending caps, chain selection across BASE, MATIC, ETH, ARB, OP, AVAX, and UNI, and structured error recovery for 422 schema mismatches and chain rejections. - Use Case: A user asks for current prediction-market odds. The agent searches the marketplace, inspects a Predexon-backed endpoint, confirms the $0.005 price, pays in USDC on Polygon, and returns the odds JSON. ## Quick Start Ask the agent to look up the current price of Bitcoin using a paid marketplace service and it will search, inspect, and pay for the API call in USDC automatically.
