ToolVet
75trust / 100

Agent Memory

by a2apay Agent Memory in Onchain & crypto

x402 APIPassing, checked 4 h ago

Persistent memory for AI agents — secure, automatically backed up, and running on redundant ICP infrastructure with no single point of failure. Store what your agent needs to remember, on-chain, pay-per-write.

POST
https://a2apay.io/api/agent-memory
Price
$0.028
per call in USDC
Uptime
100%
last 30 days
Response time
417 ms
544 ms slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://a2apay.io/api/agent-memory

Each call costs $0.028 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://a2apay.io/api/agent-memory
content-type: application/json

{
  "properties": {
    "key": {
      "type": "string"
    },
    "tags": {
      "items": {
        "type": "string"
      },
      "type": "array"
    },
    "val": {
      "type": "string"
    }
  },
  "required": [
    "key",
    "val"
  ],
  "type": "object"
}

Example response

The provider's example. We can't check it without paying.

{
  "ok": true,
  "result": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.028.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://a2apay.io/api/agent-memory' \
  -H 'content-type: application/json' \
  --data-raw '{"properties":{"key":{"type":"string"},"tags":{"items":{"type":"string"},"type":"array"},"val":{"type":"string"}},"required":["key","val"],"type":"object"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://a2apay.io/api/agent-memory' \
  -H 'content-type: application/json' \
  --data-raw '{"properties":{"key":{"type":"string"},"tags":{"items":{"type":"string"},"type":"array"},"val":{"type":"string"}},"required":["key","val"],"type":"object"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.028 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.028" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.028 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fa2apay.io%2Fapi%2Fagent-memory&method=POST
const res = await pay("https://a2apay.io/api/agent-memory", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "properties": {
      "key": {
        "type": "string"
      },
      "tags": {
        "items": {
          "type": "string"
        },
        "type": "array"
      },
      "val": {
        "type": "string"
      }
    },
    "required": [
      "key",
      "val"
    ],
    "type": "object"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.028 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.028"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://a2apay.io/api/agent-memory",
        json={
            "properties": {
                "key": {
                    "type": "string",
                },
                "tags": {
                    "items": {
                        "type": "string",
                    },
                    "type": "array",
                },
                "val": {
                    "type": "string",
                },
            },
            "required": [
                "key",
                "val",
            ],
            "type": "object",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402400 ms$0.028
10 h agoPassed402409 ms$0.028
15 h agoPassed402417 ms$0.028
20 h agoPassed402419 ms$0.028
25 h agoPassed402403 ms$0.028
Show 10 older checks
29 h agoPassed402394 ms$0.028
34 h agoPassed402415 ms$0.028
39 h agoPassed402433 ms$0.028
43 h agoPassed402414 ms$0.028
2 days agoPassed402648 ms$0.028
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3 days agoPassed402433 ms$0.028