# Long-Term Memory Indexer MCP

> Long-Term Memory Indexer MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Indexes and stores text data for long-term memory retrieval in agentic AI workflows

## Facts

- Endpoint: POST https://api.m2mcent.com/long-term-memory-indexer-mcp/api/process
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/long-term-memory-indexer-mcp-33bdca76
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2xC7_--FyQpGmakgRc4C3

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 long-term-memory-indexer-mcp-33bdca76 -d '<json body>'
```

Example prompt: Index and store this text in my agent's long-term memory so it can be recalled in future sessions: 'User prefers concise bullet-point summaries and works in the Pacific time zone.'

## When to prefer this

Choose this endpoint when an AI agent needs to persist information across sessions or conversations and requires a dedicated long-term memory indexing service. It is most appropriate when building agentic workflows where context, user preferences, or accumulated knowledge must survive beyond a single session and be retrievable later via semantic search or ID-based lookup.

## Known failure modes

- Empty or missing 'data' field returns a validation error
- Oversized text payload may be rejected or truncated
- Payment failure (x402) if USDC balance is insufficient
- Service unavailability returns a 5xx error
- Malformed JSON body results in a 400 bad request

## How this service works

The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.

## Output

A confirmation that the provided text data has been successfully indexed and stored in the long-term memory system, likely including a record ID or acknowledgment of the stored content for future retrieval.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "payload": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/long-term-memory-indexer-mcp-33bdca76/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.m2mcent.com](https://www.zero.xyz/host/api.m2mcent.com/llms.txt)