# Subzero KV Compressor MCP

> Subzero KV Compressor MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-11-03).

Compresses key-value data using subzero compression algorithms via a paid agentic endpoint

## Facts

- Endpoint: POST https://api.m2mcent.com/subzero-kv-compressor-mcp/api/process?utm_source=zero.xyz
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/subzero-kv-compressor-mcp-0147a467
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r1jpm9tyTMPaX7XtGBzpa

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 subzero-kv-compressor-mcp-0147a467 -d '<json body>'
```

Example prompt: Compress this key-value data string for me so it takes up less space: 'user_id=12345;session_token=abcxyz;preferences=dark_mode,notifications_on;locale=en-US'

## When to prefer this

Choose this endpoint when you need to compress key-value structured string data and want a simple, single-field POST interface with predictable per-call pricing. Prefer it over general-purpose compression APIs when working in agentic workflows that already use x402 micropayment infrastructure.

## Known failure modes

- Empty or missing 'data' field returns a validation error
- Malformed input string may produce unexpected compression artifacts
- Payment failure (402) if USDC balance is insufficient
- Timeout if input payload is extremely large
- Service unavailability returns 5xx error

## 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

Returns a compressed representation of the input data string, with reduced byte size achieved via subzero KV compression algorithms. The agent receives the compact encoded output suitable for storage or transmission.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/subzero-kv-compressor-mcp-0147a467/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)