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

说明与用途

Tabularium 让代理通过可验证的哈希链持久化数据，并维护签名的支出账本，确保付费服务的透明度和可审计性。

问题

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

结果

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

工作流

• 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.

证据

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

来源

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

来源

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

来源

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

来源