# Otto AI — USDC services (Circle Gateway)

Pay-per-request market-intelligence data, priced in USDC, settled gas-free via Circle Gateway batched settlement.
No subscriptions, no API keys. Informational only — not financial advice.

Endpoints (GET):
- https://usdc.ottoai.services/crypto-news — $0.001 — Real-time crypto market news with sentiment analysis and top headlines ranked by importance. Informational only. Not financial advice.
- https://usdc.ottoai.services/token-details — $0.01 — Core market metrics for a token (price, market cap, 24h volume, supply, links). Query: ?symbol=BTC. Informational only. Not financial advice.
- https://usdc.ottoai.services/token-intel — $0.05 — Deeper token intelligence report — narrative, context, and on-chain & social signals for a token. Query: ?symbol=ETH. Informational only. Not financial advice.
- https://usdc.ottoai.services/yield-data — $0.05 — Live lending-yield (APY) data across Aave, Morpho, Compound and Maple vaults. Informational only. Not financial advice.
- https://usdc.ottoai.services/twitter-summary — $0.001 — Quick pulse from crypto Twitter — breaking news, trending narratives, sentiment shifts. Informational only. Not financial advice.
- https://usdc.ottoai.services/tx-explainer — $0.01 — Plain-English explanation of any EVM transaction across 11 supported chains. Query: ?chain=base&hash=0x... Informational only. Not financial advice.

Discovery: each route advertises an x402 Bazaar discovery extension (input/output schemas) in its 402 response.
Payment: scheme "exact" on EVM networks with a Circle Gateway balance; the 402 `accepts[]` includes a `GatewayWalletBatched` extra for EIP-712 signing.

More: https://usdc.ottoai.services