A

Ausca Agent Inbox · Extend Inbox

by Ausca Agent Inbox

POSTBase

$0.05

per call · USDC on Base

Add purchased time to the current expiry of one active receive-only inbox. The same inbox id, address, messages, read/delete capability, and limits remain in place. Deleted or expired inboxes cannot be revived, and prepaid expiry cannot exceed 30 days from the extension time.

Endpoint

POST https://ausca.com/v1/extend-inbox

4

Calls / 30d

1

Unique payers / 30d

Sep 7

Last called

exact

Payment scheme

Call this service

TypeScript · @x402/fetch
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://ausca.com/v1/extend-inbox", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "canonicalizer_version": "runx.receipt.c14n.v1",
    "idempotency_key": "ausca-x402-discovery-example",
    "input": {
      "additional_duration_seconds": 86400,
      "expected_expires_at": "2026-09-01T01:00:00.000Z",
      "extension_authorization": "aue_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
      "inbox_id": "inb_0123456789abcdef0123456789abcdef01234567"
    },
    "input_schema_digest": "sha256:3f4d2fcd4f4952ae208026fbbb87d2f0c6865c0cd74b056c518ab36eda949c71",
    "offer_id": "inbox.extend",
    "offer_revision": "extend-duration-r2",
    "offer_revision_digest": "sha256:689b4e63f192bbd76661275c293110f0a12ea4e1e9368cf3cef29453dad0c5e9",
    "output_schema_digest": "sha256:acbd57825a9322b373f3f61c3993bd9c65757d4ea01f899a9d46113906503636"
  }),
});
const data = await res.json();
cURL
curl -X POST \
  "https://ausca.com/v1/extend-inbox" \
  -H "Content-Type: application/json" \
  -d '{"canonicalizer_version":"runx.receipt.c14n.v1","idempotency_key":"ausca-x402-discovery-example","input":{"additional_duration_seconds":86400,"expected_expires_at":"2026-09-01T01:00:00.000Z","extension_authorization":"aue_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA","inbox_id":"inb_0123456789abcdef0123456789abcdef01234567"},"input_schema_digest":"sha256:3f4d2fcd4f4952ae208026fbbb87d2f0c6865c0cd74b056c518ab36eda949c71","offer_id":"inbox.extend","offer_revision":"extend-duration-r2","offer_revision_digest":"sha256:689b4e63f192bbd76661275c293110f0a12ea4e1e9368cf3cef29453dad0c5e9","output_schema_digest":"sha256:acbd57825a9322b373f3f61c3993bd9c65757d4ea01f899a9d46113906503636"}' \
  -H "X-PAYMENT: <signed x402 payment>"

Example response

{
  "invocation": {
    "invocation_id": "ausca-discovery-example",
    "offer_revision_digest": "sha256:689b4e63f192bbd76661275c293110f0a12ea4e1e9368cf3cef29453dad0c5e9",
    "output": {
      "extension": {
        "additional_duration_seconds": 86400,
        "address": "inbox+0123456789abcdef0123456789abcdef01234567.89abcdef01234567@mail.ausca.com",
        "expires_at": "2026-09-02T01:00:00.000Z",
        "extended_at": "2026-09-01T00:30:00.000Z",
        "inbox_id": "inb_0123456789abcdef0123456789abcdef01234567",
        "previous_expires_at": "2026-09-01T01:00:00.000Z",
        "schema": "ausca.agent_inbox.extension.v1",
        "state": "active"
      }
    },
    "output_digest": "sha256:66004d562e7ec85c0d5cf8504ed3d87e707671db55e74c2cd90ee1b59b3a72bd",
    "receipt_ref": {
      "type": "receipt",
      "uri": "runx:receipt:discovery-example"
    },
    "state": "succeeded",
    "updated_at": "2026-01-01T00:00:00Z"
  },
  "status": "accepted"
}

Payment details

Pay to0x26572ff23c6c52bfb1a69cb0c9114a8be443b422
AssetUSDC · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913
NetworksBase
Schemesexact

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