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Documentation Index

Fetch the complete documentation index at: https://docs.sault.ai/llms.txt

Use this file to discover all available pages before exploring further.

The vault pays for everything an agent does. It needs a balance before any paid call can settle. There are two ways to fund it, and an agent can pay as soon as funds settle.

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Send crypto

Open the vault in the console and copy its address for the chain you want to fund. Send USDC (or another supported stablecoin) to that address from any wallet or exchange.
  • EVM address — Base, Tempo
  • Solana address — Solana
Funds are usable once the transfer confirms on-chain. No extra step in the console.

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Add funds with a card

For a faster start, the console has Add funds — pay with a card and the vault is topped up in stablecoin for you. It is built for quick onboarding and small, frequent payments:

Quick to start

No lengthy identity checks for everyday amounts. Add funds and your agent can pay within minutes.

Sized for micropayments

Up to $500 per week. More than enough for the per-call, sub-cent-to-few-dollar payments agents make.
1

Open Add funds

In the console, open the vault and choose Add funds.
2

Pay with a card

Enter the amount and pay. The card flow is handled by our payments provider — SAULT never stores your card details.
3

Vault is topped up

The amount lands in the vault as stablecoin. Your agent can pay against it right away.
The weekly card limit is a guardrail for the quick-start flow, not the vault’s ceiling. To run larger balances, send crypto directly — there is no cap on on-chain top-ups.

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Watching the balance

An agent can read the vault balance at any time (sault balance / sault_balance) and check today’s spend against its cap (sault spending / sault_spending). When a paid call fails for lack of funds, the agent gets a clear, structured error to report back rather than retrying blindly.