Memory your AI agent can prove: pay-per-call storage and a signed spending ledger over x402

Описание и применение

Tabularium предоставляет агентам возможность сохранять данные с доказуемой цепочкой хешей и вести подписанный реестр расходов, обеспечивая прозрачность и аудит платежей.

Задача

Agents need a way to persist learned data across sessions and to provide verifiable records of spending when they use paid services.

Результат

Tabularium enables agents to persist data with verifiable proof and to maintain a signed spending ledger, providing transparency and auditability for paid services.

Рабочий процесс

• 1. Add Tabularium to the MCP client with the command: claude mcp add tabularium --env TABULARIUM_PRIVATE_KEY=0x... -- npx -y tabularium-mcp
• 2. Ask the agent to remember data or use the load_memory prompt.
• 3. The agent performs write/read calls; each write is appended to a hash chain and signed by the server.
• 4. The MCP server writes a signed receipt into the agent’s workspace via tabularium_pay for each purchase.
• 5. The agent can export its entire history; anyone can verify it offline with a zero‑dependency script.
• 6. The tabularium_ledger totals spend by service and day.
• 7. Spending is capped at $1 per session by default, with a single purchase limit of $0.10.
• 8. The service is paid per call over x402 in USDC on Base; a typical session of 10 reads and 20 writes costs about eight cents.

Доказательства

A small paid service with four calls: write, read, renew, export.

Источник

Every write is appended to a hash chain, and the server signs the head with an Ed25519 key published in its menu.

Источник

The MCP server includes tabularium_pay: it pays any x402 service and writes a signed receipt into the agent's workspace...

Источник

From Claude Code or any MCP client: claude mcp add tabularium --env TABULARIUM_PRIVATE_KEY=0x... -- npx -y tabularium-mcp

Источник