# PitchPilot Cold Email Grader

> PitchPilot Cold Email Grader is a paid API for AI agents from pitchpilot-outreach-api.pitchpilot-agents.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-16).

Grades a cold email's subject line and body on a 0-100 scale with an A-D letter grade and itemized checks

## Facts

- Endpoint: GET https://pitchpilot-outreach-api.pitchpilot-agents.workers.dev/grade
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pitchpilot-cold-email-grader-1a413917
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zq1eGGG4syjhkFhzNsLF2

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 pitchpilot-cold-email-grader-1a413917
```

Example prompt: Can you grade my cold email? Subject: 'Quick question about your Q3 pipeline' — body: 'Hi Sarah, I noticed you're scaling your sales team and wanted to share how we helped a similar company cut ramp time by 40%. Would you be open to a 15-min call this week?'

## When to prefer this

Use this endpoint when an AI agent or sales automation workflow needs a fast, automated quality gate on cold email copy before sending — especially when you want a structured score plus itemized feedback checks rather than free-form LLM critique. At $0.005 per call it is cost-effective for high-volume outreach pipelines.

## Known failure modes

- Missing required 'subject' or 'body' query parameters returns an error or degraded response
- Very short or empty email body may yield a low score with minimal check detail
- Non-English content may not be graded accurately
- Payment failure via x402 (insufficient USDC balance) blocks access with a 402 response

## How this service works

Paid micro-utilities for cold-email outreach agents: domain deliverability audits, cold-email grading, template generation, plus a tools toolbox (hashing, JWT decode, IDs, slugs, JSON, regex, crypto prices, domain age, weather). Paid via x402 (USDC on Base).

## Output

Returns a JSON object with a numeric score from 0-100, an A-D letter grade, and an array of check objects detailing individual criteria evaluated (e.g. subject line clarity, spam trigger words, call-to-action presence, personalization signals).

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "body": {
       "type": "string",
       "description": "Plain-text email body to grade"
      },
      "subject": {
       "type": "string",
       "description": "Email subject line to grade"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "score"
     ],
     "properties": {
      "grade": {
       "type": "string",
       "description": "A-D letter grade"
      },
      "score": {
       "type": "number",
       "description": "0-100"
      },
      "checks": {
       "type": "array",
       "items": {
        "type": "object"
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "grade": "B",
  "score": 82,
  "checks": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pitchpilot-cold-email-grader-1a413917/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pitchpilot-outreach-api.pitchpilot-agents.workers.dev](https://www.zero.xyz/host/pitchpilot-outreach-api.pitchpilot-agents.workers.dev/llms.txt)