Memory audit log

Tamper-evident history of every change to a namespace — an append-only, hash-chained audit log the server attests to (provenance an agent can't forge for itself). ?owner=0x… reads a granted namespace.

Input

Field	Type	Description
limit	string	Max entries (1-1000, default 100)
owner	string	Optional 0x namespace (requires a grant)

Example output

{
  "ns": "0x…",
  "entries": [
    {
      "seq": 1,
      "action": "put",
      "key": "task-42",
      "hash": "…",
      "prevHash": ""
    }
  ]
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/memory/log?limit=50"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/memory/log?limit=50");

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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