# memory-mcp Write Memory

> memory-mcp Write Memory is a paid API for AI agents from mem.borisinc.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Stores a text memory entry (up to 8000 chars) into a wallet-namespaced, semantically-indexed persistent memory store for AI agents, paid per call via x402 USDC.

## Facts

- Endpoint: GET https://mem.borisinc.com/paid/memory/write
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/memory-mcp-write-memory-aa5d402d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CMDiVETw-erJdkjletPbn

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability memory-mcp-write-memory-aa5d402d
```

Example prompt: Save this to my persistent memory so you can recall it later: 'Alice prefers morning meetings, hates Mondays, and her favorite project tool is Notion' — tag it as 'user-preferences'.

## When to prefer this

Choose this endpoint when you need to persist a specific text memory for an AI agent without requiring any account or API key — just a wallet. Ideal for MCP-compatible agents that need private, semantically-indexed, per-wallet memory namespacing with micropayment-based access control. Prefer over generic databases when you want pay-per-write pricing with no subscription commitment and built-in semantic search compatibility.

## Known failure modes

- Content exceeds 8000 character limit — request rejected
- Missing required 'content' query parameter — validation error
- Insufficient USDC balance or payment failure via x402 — 402 Payment Required
- Invalid wallet address or payment header — authentication error
- Memory embedding service temporarily unavailable — 503 error

## How this service works

Persistent memory for AI agents, paid per call via x402 (USDC, Base mainnet) — your wallet is your private, semantically-indexed memory namespace. Write $0.001, search $0.002, export $0.01; free trial + $2/30d unlimited subscription. MCP + HTTP. No account, no API key.

## Output

Returns a JSON object with the assigned memory ID (integer), a boolean confirming embedding was created, and the wallet-derived namespace string (e.g. 0xabc...) that scopes this memory entry privately to the calling wallet.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "content"
     ],
     "properties": {
      "tags": {
       "type": "string",
       "description": "Comma-separated tags"
      },
      "content": {
       "type": "string",
       "description": "Memory text to store (max 8000 chars)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": 42,
  "embedded": true,
  "namespace": "0xabc..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/memory-mcp-write-memory-aa5d402d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mem.borisinc.com](https://www.zero.xyz/host/mem.borisinc.com/llms.txt)