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Initiates a high context session wrapper around multiple internal endpoints related to balancing capital, routing yield, and managing headcount thresholds without needing to pay the L402 HTTP overhead on every single sequential call. Endpoint POST /api/mpp/agent/session/treasury Pricing $0.02 session opening charge — Followed by aggregated billing or fractional ticks against the locked gas reserve. Payment type Session — Designed specifically for long-context execution windows, generally wrapped automatically by the AgentCash execution driver. Request 
{
  "employerId": "e3b0c442...91b7852b855",
  "maxDeposit": "150000000000000000"
}
Response 
{
  "sessionToken": "mpp_sess_123xyz...",
  "channelTxHash": "0xSessionHashOpen442"
}
Example 
npx agentcash try https://remlo.xyz
Notes Once open, subsequent queries like yield-rates and optimize utilize the returned sessionToken dynamically. Sessions expire if gas reserves are stripped down to 0, or by an explicit close execution, releasing unspent locked funds back to the user context.

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Authorization

All four actions (balance, yield, headcount, rebalance) require the employer (Privy) or an authorized Tier 1 / Tier 2 agent. The rebalance action moves on-chain capital and is always principal-bound — payment alone is never enough. See Authentication.