# PayPerWork Decide v1 SystemOne

> PayPerWork Decide v1 SystemOne is a paid API for AI agents from payperwork.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-02).

Evaluates a decision model defined by a typed state and questions (yes/no, choice, score), returning answers as probabilities in a single pass with no generated text.

## Facts

- Endpoint: POST https://payperwork.app/decide/v1/systemone?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/payperwork-decide-v1-systemone-4522dbca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C9nT_Q1eh2YsZgzAODLI3

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 payperwork-decide-v1-systemone-4522dbca -d '<json body>'
```

Example prompt: Run a decision model on this user's subscription state — ask whether they're likely to churn (yes/no), what tier they best fit (choice: free, pro, enterprise), and how engaged they are (score 0–10), and give me back probabilities for each.

## When to prefer this

Choose this endpoint when you need structured probabilistic answers to typed decision questions (yes/no, choice, score) against a defined state, without any generated natural-language text. It is ideal for agents that need fast, cheap, repeatable classification or scoring in a single pass — preferred over a chat completions endpoint when you want no hallucinated prose, deterministic output structure, and cost-efficient ($0.001/call) bulk decisioning.

## Known failure modes

- Malformed state object causes a 400 validation error
- Unsupported question types return an error indicating invalid schema
- Questions with ambiguous or contradictory state may yield flat/uniform probability distributions
- Rate limiting or payment failure returns a 402 or 429 error
- Network timeout if state payload is very large

## How this service works

Decision models for agents: a state plus typed questions (noul yes/no, choice, score) answered as probabilities in one pass, no generated text.

## Output

Returns probability distributions for each typed question: yes/no questions yield a probability for true/false, choice questions yield a probability per option, and score questions yield a probability-weighted score — all computed in a single inference pass with no generated text.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/payperwork-decide-v1-systemone-4522dbca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payperwork.app](https://www.zero.xyz/host/payperwork.app/llms.txt)