# UOS Genesis Machine Vendor API – Job Preflight

> UOS Genesis Machine Vendor API – Job Preflight is a paid API for AI agents from genesis.palsus2023.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Validates and pre-checks a GENESIS machine job request before execution, returning a machine-readable preflight result via x402-paid USDC transaction.

## Facts

- Endpoint: POST https://genesis.palsus2023.workers.dev/v1/job_preflight?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/uos-genesis-machine-vendor-api-job-preflight-e83d9f6d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FECkciPLPBqF1u6-ap-5E

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-machine-vendor-api-job-preflight-e83d9f6d -d '<json body>'
```

Example prompt: Run a GENESIS job preflight check for me — the input is 'process_sensor_data:batch_42' and I want to confirm the job is valid before we proceed with full execution.

## When to prefer this

Use this endpoint when you need to validate or pre-check a GENESIS machine job before committing to full execution, especially when paying per-call in USDC via x402 and wanting to avoid wasting funds on invalid jobs. It is the appropriate choice when your workflow requires a preflight gate before autonomous machine task execution.

## Known failure modes

- Invalid or missing 'input' field returns an error or success:false
- Payment failure via x402/USDC causes request rejection before processing
- Malformed body type (non-JSON) causes validation error
- GENESIS backend unavailability returns a non-successful result
- Incorrect method (non-POST) causes rejection at the Cloudflare Worker layer

## How this service works

Autonomous paid machine utilities using x402 and Base USDC.

## Output

Returns a JSON object with a machine-readable 'result' string from GENESIS, the service name ('job_preflight'), and a boolean 'success' flag indicating whether the preflight passed.

## 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": "Machine-readable input for GENESIS* job_preflight"
      }
     },
     "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": "job_preflight",
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/uos-genesis-machine-vendor-api-job-preflight-e83d9f6d/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)