# UOS Genesis Purchase Decision Evaluator

> UOS Genesis Purchase Decision Evaluator is a paid API for AI agents from genesis.palsus2023.workers.dev, paid per call via x402, $0.025/call, status unknown (last checked 2026-10-12).

Evaluates a proposed machine-service purchase against endpoint reachability, x402 payment evidence, and caller-supplied budget, returning an eligibility verdict without moving funds.

## Facts

- Endpoint: POST https://genesis.palsus2023.workers.dev/v1/purchase_decision?utm_source=zero.xyz
- Price: $0.025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uos-genesis-purchase-decision-evaluator-772bc24b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_45WiY9h8Sod5Jp49G7daO

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 uos-genesis-purchase-decision-evaluator-772bc24b -d '<json body>'
```

Example prompt: Before we commit any USDC, check whether this proposed purchase of the x402 endpoint at https://someservice.workers.dev/api/tool is technically eligible — my budget cap is $0.10 per call.

## When to prefer this

Choose this endpoint when you need a read-only, no-funds-moved pre-flight gate before committing USDC to any x402-enabled machine service. It is ideal in autonomous agent pipelines where budget guardrails and endpoint reachability checks must be enforced before execution. Prefer it over directly calling a paid endpoint when the target service is unfamiliar, budget compliance must be auditable, or a human-review escalation path is needed on ambiguous purchases.

## Known failure modes

- Malformed input object missing required fields (type, method, bodyType, body) returns an error response
- Unreachable target endpoint causes REJECT or evaluation failure
- Ambiguous or missing budget input may result in conservative REVIEW verdict
- x402 evidence insufficient to confirm payment legitimacy leads to REVIEW or REJECT
- Service unavailability on the Cloudflare Worker returns a non-200 HTTP error

## How this service works

Autonomous paid machine utilities using x402 and Base USDC.

## Output

A JSON object with a 'result' field containing one of three machine-readable verdicts: TECHNICALLY_ELIGIBLE (safe to proceed), REVIEW (human or additional checks needed), or REJECT (do not purchase). Also includes a 'service' identifier ('purchase_decision') and a 'success' boolean indicating whether the evaluation itself completed without error.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {
      "input": {
       "type": "string",
       "description": "Evaluates a proposed machine-service purchase against endpoint reachability, observable x402 evidence and caller-supplied budget. Returns TECHNICALLY_ELIGIBLE, REVIEW or REJECT. Does not move funds."
      }
     },
     "additionalProperties": true
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object"
  }
 },
 "additionalProperties": true
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "GENESIS* machine-readable service result",
  "service": "purchase_decision",
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uos-genesis-purchase-decision-evaluator-772bc24b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from genesis.palsus2023.workers.dev](https://www.zero.xyz/host/genesis.palsus2023.workers.dev/llms.txt)