# Classifier Regression Desk: Offline Paired Evaluation of JSONL Predictions

> Classifier Regression Desk: Offline Paired Evaluation of JSONL Predictions is a paid API for AI agents from speedbot.dev, paid per call via x402, $2/call, status unknown (last checked 2026-10-18).

Purchases and downloads a dependency-free Python toolkit for comparing classifier predictions before and after a model change using paired JSONL evaluation.

## Facts

- Endpoint: POST https://speedbot.dev/api/products/product_6fad9e5f17144691a564fc60eb7dc297/versions/version_35e88c89c5634a59bdc65bf22b741660/buy?utm_source=zero.xyz
- Price: $2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/classifier-regression-desk-offline-paired-evaluation-of-jsonl-0bb07fcb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LBAXB4ZN29JIu6rEzbuyG

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 classifier-regression-desk-offline-paired-evaluation-of-jsonl-0bb07fcb -d '<json body>'
```

Example prompt: I want to buy the Classifier Regression Desk offline JSONL evaluation kit — can you purchase it and have it delivered to my email dev@example.com? Generate the checkout key and request ID needed, and I consent to immediate digital delivery.

## When to prefer this

Choose this endpoint when you need a self-contained, dependency-free Python toolkit for offline paired evaluation of JSONL classifier predictions — particularly when comparing model outputs before and after a model update. Prefer this over cloud-based ML evaluation services when offline execution, no external dependencies, and commercial use (without redistribution) are required.

## Known failure modes

- Invalid email format returns validation error
- checkout_key not exactly 64 hex characters causes rejection
- request_id shorter than 16 characters fails validation
- digital_delivery_consent not set to true blocks purchase
- Payment failure or insufficient USDC balance prevents checkout
- Duplicate request_id on a new purchase may cause conflicts
- First-time purchase may be charged at 0.01 USDC promotional rate; subsequent purchases at 2 USDC

## How this service works

Classifier Regression Desk: Offline Paired Evaluation of JSONL Predictions. An original, dependency-free Python kit for developers comparing classifier predictions before and after a model o First approved purchase: 0.01 USDC total where maker terms permit; later 2 USDC plus tax. Stored ZIP download; commercial use, no redistribution. Verified by Speedbot for this version. Generate a private checkout_key and request_id; email and delivery consent required.

## Output

A ZIP file download containing an original, dependency-free Python source kit for paired offline evaluation of JSONL classifier predictions, comparing model outputs before and after changes. Delivered digitally to the provided email address upon successful payment of 2 USDC.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "pattern": "^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$",
   "description": "Your receipt/recovery email; required when paying, never copied to the facilitator."
  },
  "request_id": {
   "type": "string",
   "maxLength": 100,
   "minLength": 16,
   "description": "Generate a unique purchase identifier and retain on every retry."
  },
  "checkout_key": {
   "type": "string",
   "pattern": "^[a-fA-F0-9]{64}$",
   "writeOnly": true,
   "description": "Generate 32 private random bytes as 64 hex characters. Required when paying. Retain on every retry."
  },
  "digital_delivery_consent": {
   "type": "boolean",
   "const": true,
   "description": "Required for a purchase: request immediate digital delivery and acknowledge the applicable withdrawal consequence."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/classifier-regression-desk-offline-paired-evaluation-of-jsonl-0bb07fcb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from speedbot.dev](https://www.zero.xyz/host/speedbot.dev/llms.txt)