meter_open

Active

declared in 1.9.0

Open a usage/budget meter recorded in SaSame's append-only ledger. Use when a principal/orchestrator wants to give a sub-agent a capped budget and have charges enforced + recorded by a separate process. SaSame holds NO funds and is NOT a payment processor: it timestamps and ed25519-signs the envelope with its published public key, so the accounting is offline-verifiable. Returns a meter_id + a signed receipt (verify the signature with trust_pubkey).

Parameters schema

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "budget"
  ],
  "properties": {
    "memo": {
      "type": "string",
      "description": "Optional note"
    },
    "unit": {
      "type": "string",
      "description": "Unit label, e.g. 'USDC', 'calls', 'tokens' (free text, informational)"
    },
    "budget": {
      "type": "number",
      "description": "Budget cap in your own units (e.g. USDC, tokens, calls). Charges beyond this are rejected."
    },
    "owner_label": {
      "type": "string",
      "description": "Who owns this budget (self-claimed label, unverified)"
    }
  }
}

What this tool wraps· 0 endpoints

min confidence0.70 0.50

No endpoints wrapped at confidence ≥ 0.50.

Parent server

SaSame Research Agent

https://github.com/shigeki7777/sasame-mcp

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