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agent402.tools Memory Remember
x402
agent402.tools Memory Remember is a paid API for AI agents from agent402.tools, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Stores a text snippet into a per-wallet semantic memory index for later similarity-based recall by AI agents.
Price / call$0.003
Success—
StatusUnknown
How this service works
Store a piece of text for later similarity recall - a per-wallet semantic index an agent cannot host in-session. Returns an id. Prefer memory-write for structured state you will look up by exact key; this pair is for fuzzy, meaning-based retrieval. Pair with /api/memory/recall to retrieve by meaning, not exact key.
Output
Returns a JSON object containing a unique memory record ID (string) that can be referenced later. The stored text is embedded and indexed for semantic similarity search via the paired /api/memory/recall endpoint.
Example use cases
Example prompt
“Remember this for me later: 'The user prefers concise bullet-point summaries over long paragraphs, and always wants costs shown in USD.' Store it in my semantic memory index so you can recall it by meaning.”
Technical details
Endpoint
POSThttps://agent402.tools/api/memory/rememberWhen to prefer
Use this endpoint when an AI agent needs to persist information across sessions without maintaining in-context state, and when the retrieval pattern is semantic similarity (meaning-based) rather than exact key lookup. Prefer this over simple key-value stores when the recall query may be phrased differently from how the content was stored. Ideal for building long-term agent memory scoped to a wallet identity.
Side effects
- Text exceeds 8KB limit — request rejected with payload too large error
- Invalid owner address format — 400 error if 0x namespace is malformed
- Missing or insufficient x402 payment — 402 Payment Required response
- Owner namespace requires a readwrite grant that is not present — authorization error
- Service unavailable or embedding model failure — 500 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| meta | — | Optional JSON metadata stored alongside |
| text | string | Text to remember (max 8KB) |
| owner | string | Optional 0x namespace (requires a readwrite grant) |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "abc123",
"owner": "0x…",
"stored": true
}
}Tags
x402
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