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x402.shizu.me Durable Key-Value Memory Store
x402
x402.shizu.me Durable Key-Value Memory Store is a paid API for AI agents from x402.shizu.me, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Stores and retrieves persistent JSON key-value pairs (up to 8KB, 30-day TTL) scoped to a paying wallet, giving stateless AI agents cross-run memory.
Price / call$0.002
Success—
StatusUnknown
How this service works
Durable key/value memory for stateless agents, private to your paying wallet. POST {key, value, ttl?} to store JSON; GET ?key= to read it back on a later run. Value up to 8KB, ttl up to 30d. An agent cannot persist state across runs by itself — this is that missing memory as one call.
Output
On GET: returns the JSON value previously stored under the specified key, along with metadata such as expiry time. Returns null or a not-found indicator if the key does not exist or has expired.
Example use cases
Example prompt
“Read back the value I stored under the key 'user-preferences' in my agent memory from a previous run — I need to retrieve that JSON object now.”
Technical details
Endpoint
GEThttps://x402.shizu.me/kvWhen to prefer
Use this endpoint when an AI agent needs to persist state, context, or intermediate results across multiple stateless runs and cannot rely on in-process memory. Ideal for multi-step workflows, resumable tasks, user preference storage, or any scenario where an agent must recall data from a prior session. Prefer this over alternatives when wallet-scoped privacy (data private to your paying wallet) and simplicity (single GET/POST interface) are priorities. Not suited for large data (>8KB) or long-term archival beyond 30 days.
Side effects
- Key not found or expired — returns 404 or empty response
- Value exceeds 8KB limit — request rejected
- TTL exceeds 30-day maximum — request rejected
- Invalid JSON value — storage rejected
- Payment not included or insufficient USDC — 402 response blocking access
- Key name malformed or missing — 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object |
Output
Schema · Response
{
"type": "json",
"example": {
"key": "run-42-cursor",
"ttl": 86400,
"stored": true,
"expires": 1784400000
}
}Tags
x402
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Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"