AgentLine gives AI agents real US phone numbers, inbound/outbound voice calls, AI receptionists, transcripts, inbound SMS and live phone events. Use REST or MCP without signup: recharge and save agent_token. This endpoint adds prepaid credit with Base USDC x402 or Tempo MPP. $1 minimum recharge; numbers $2/30 days; connected calls $0.10/min (first-minute minimum, then per-second); inbound SMS $0.02. Other endpoints use prepaid balance and do not accept payments.

Add prepaid call credit (USDC on Base). This recharge is the balance calls draw from at $0.10/min. Placing a call is not a second payment. A call that never connects is not billed. Inbound SMS is $0.02.