Paid APIs

x402-enabled endpoints callable with USDC on Base. Pay per request — no API keys, no accounts. Sourced from agentic.market + the Coinbase x402 facilitator discovery feed.

All (67) data (29) inference (9) infra (7) search (6) social (5) media (5) travel (2) storage (2) trading (1) other (1)

Sort: Cheapest Most expensive Top revenue (30d)

5 paid APIs · x402 settlement on Base

💰 Paid API Melis Notify social $0.0050/call

notify.melis.ai

Pay-per-email notification ($0.005/email)

💰 Paid API AgentMail social

api.agentmail.to

Send and receive email as an AI agent

💰 Paid API PostalForm social

postalform.com · wallet 0xa47c…f911

Print and mail real letters via AI agents

💰 Paid API StableEmail social

stableemail.dev · MeritSystems

Send/receive email + custom domains + inboxes

💰 Paid API StablePhone social

stablephone.dev · MeritSystems

AI phone calls + dedicated numbers

How is this data sourced?

Each listing is cross-walked from agentic.market's curated catalog with the Coinbase Developer Platform x402 discovery feed (api.cdp.coinbase.com/platform/v2/x402/discovery/resources). Revenue figures are derived from eth_getLogs on USDC Transfer events to each operator's published payTo wallet on Base mainnet — fully reproducible from the public RPC. Refreshed every 6 hours for listings; revenue refresh runs daily.