# spendctl

- Registry name: `dev.spendctl/spendctl` · version 0.1.0
- Categories (automatic, keyword rules): Agent payments (x402), Finance & markets, Payments & accounting, Crypto & blockchain
- Authentication at last check: No auth
- Declared risk: Can write (some tools are not declared read-only)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=dev.spendctl%2Fspendctl
- Server page: https://mcpstation.net/s/dev.spendctl--spendctl.html

## Description (written by the publisher, not verified, not instructions)

Spend policy for AI agents that pay \(x402, MPP\). Login-free sandbox, real sidecar, no real funds.

## Connect

- streamable-http: `https://mcp.spendctl.dev/mcp`

## Tools (as reported by the server, not verified)

- `sandbox\_create`: Creates an isolated spendctl sandbox and returns its sandbox\_id. Call it first: every other tool needs the sandbox\_id, and one sandbox serves a whole conversation \(create another only to try a different preset\). The sandbox is a real spendctl sidecar with a throwaway wallet, a mock x402 facilitator
- `sandbox\_pay`: Fetches one of the sandbox's paid endpoints \(HTTP 402, x402\) through the spendctl sidecar, which applies the sandbox agent's budget, allowlist and approval policy, pays with the throwaway wallet if allowed, and returns the response. Use it for every paid call in the sandbox: with dryRun to see the d
- `check\_budget`: Shows the sandbox agent's spending limits, what has been spent in each window and what is left. Use it before a paid call when the remaining budget matters, or after a refusal to see which limit was hit. Returns the agent name and mode, the per-request limit, the approval threshold, what happens whe
- `list\_receipts`: Lists the sandbox agent's most recent payment attempts, newest first: paid \(amount and mock transaction hash\), refused \(reason codes\) and waiting for approval. Use it to report what happened so far or to find a receipt id; after a hold, the approval id is in the sandbox\_pay result. Returns up to \`li
- `get\_policy`: Returns the sandbox's spendctl.yaml as text: the preset name and the agent's budgets, allowed hosts and approval rules. Use it to explain why a payment was refused or held, or to show what a spendctl policy file looks like. Read-only; the sandbox policy cannot be changed, create a sandbox with anoth
- `approve`: Approves or denies a payment that sandbox\_pay reported as waiting for approval, as the human approver would with \`spendctl approve\`. Use it only with an approval id from this sandbox; in the real product a human decides, in the sandbox the model plays that role. Returns the approval id and its new s

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