# Prompt Efficiency Scorer MCP

> Prompt Efficiency Scorer MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Analyzes and scores a given prompt for efficiency, quality, and optimization potential

## Facts

- Endpoint: POST https://api.m2mcent.com/prompt-efficiency-scorer-mcp/api/process
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/prompt-efficiency-scorer-mcp-a03b4b3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yKrPTWftmOGOrAAI5kgLH

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 prompt-efficiency-scorer-mcp-a03b4b3b -d '<json body>'
```

Example prompt: Can you score the efficiency of this prompt for me: 'Please, if it is not too much trouble, could you kindly provide me with a summary of the key points from the following text, if you have time'? I want to know how efficient and clean it is.

## When to prefer this

Use this endpoint when you need to programmatically evaluate the efficiency or quality of AI prompts, especially in workflows where prompt engineering quality control is required. It is particularly useful for agents that auto-generate or iterate on prompts and need a scoring signal to optimize them.

## Known failure modes

- Empty or missing 'data' field returns an error or zero score
- Extremely long prompts may exceed input limits
- Ambiguous or non-prompt text may produce low-confidence scores
- Network timeout on the POST request
- Payment failure via x402 protocol blocks 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

Returns an efficiency score or set of metrics for the submitted prompt, likely including a numeric score, qualitative feedback, and potentially suggestions for improving clarity, conciseness, or token efficiency.

## 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/prompt-efficiency-scorer-mcp-a03b4b3b/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)