# Context Window Optimizer MCP

> Context Window Optimizer MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).

Optimizes and compresses content to fit within LLM context windows by processing input text data

## Facts

- Endpoint: POST https://api.m2mcent.com/context-window-optimizer-mcp/api/process?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/context-window-optimizer-mcp-f8a8900c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qLSQVriKwpzpYZx645zF8

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 context-window-optimizer-mcp-f8a8900c -d '<json body>'
```

Example prompt: Can you optimize this large block of text so it fits within a context window without losing the key information: [paste text here]?

## When to prefer this

Choose this endpoint when you need to programmatically reduce token usage or fit large text content into a constrained LLM context window, especially in agentic pipelines where context management is automated and requires a pay-per-call model.

## Known failure modes

- Empty or missing 'data' field returns a validation error
- Input text that is already within optimal size may be returned unchanged
- Extremely large inputs may time out or be truncated beyond usefulness
- Malformed JSON input results in a 400 bad request response

## 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 processed, optimized text content that has been compressed or restructured to fit within LLM context window constraints, preserving the most relevant information from the input data.

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/context-window-optimizer-mcp-f8a8900c/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)