All projects on Base Sepolia matching “usdc”

Redeem a room invite ($0.01 USDC, testnet only) — the verified payer becomes a viewer of the inviting org

Regulatory + legal signals: Typed, citable signals extracted weekly from the East African legal record — official notices, bills in progress, trade-standard notifications and import-rejection alerts — keyed to the same country + commodity vocabulary as the price and news layers. Up to 100 rows per call, $0.10 USDC. Filters: source, jurisdiction, country, commodity, regulation_type, instrument_type

[SAMPLE / TEST CONTENT] [$0.20 per article (USDC on Base mainnet; SAMPLE / TEST CONTENT, not a published article)] ATK Magazine EXAMPLE (draft, not published): [EXAMPLE] SIGNAL: ResearchAgent pays writers per article with x402 v2 on XRPL Testnet. Returns a JSON excerpt/placeholder of one example article.

TESTNET ONLY: prove the KlearFlow recover_revenue x402 capability through the PayAI facilitator using test USDC.

Buy one virtual number for SMS verification. First GET /agent/v1/quote, then POST here with X-Quote-Id and Idempotency-Key (service_id/country_id in the query string). The 402 advertises the locked price. If no number is available the API answers 409 no_numbers and nothing is charged.