# the402.ai Sovereign Execution Engine — Purchase

> the402.ai Sovereign Execution Engine — Purchase is a paid API for AI agents from api.the402.ai, paid per call via x402, $0.053/call, status unknown (last checked 2026-09-14).

Purchases execution of an AI agent job via the Sovereign Execution Engine primitives on the402.ai marketplace, returning a job ID and thread for tracking.

## Facts

- Endpoint: POST https://api.the402.ai/v1/services/svc_54ddbc214801485d/purchase
- Price: $0.053/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/the402-ai-sovereign-execution-engine-purchase-21aea4be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LXj0Dvdc7c4ZimF1s6jbT

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 the402-ai-sovereign-execution-engine-purchase-21aea4be -d '<json body>'
```

Example prompt: Submit a job to the402.ai's Sovereign Execution Engine — pay the $0.053 USDC fee via x402 and give me back the job ID and thread ID so I can track its status.

## When to prefer this

Choose this endpoint when you need to programmatically purchase and launch an AI agent execution job on the402.ai marketplace using x402 USDC micropayments, particularly when you want sovereign, primitive-level agent execution with job tracking via thread ID. Prefer this over generic cloud compute when you need agent-native, pay-per-call execution without subscriptions.

## Known failure modes

- Payment failure or insufficient USDC balance — payment not processed, job not created
- Invalid or expired service ID (svc_54ddbc214801485d) — 404 or bad request response
- Malformed request body — 400 validation error
- Service temporarily unavailable — 503 or timeout
- x402 protocol handshake failure — payment header missing or rejected

## How this service works

Purchase: Sovereign Execution Engine — AI Agent Execution Primitives

## Output

Returns a JSON object with job_id (unique identifier for the submitted job), status (initial execution status), and thread_id (for tracking and polling the job's progress on the402 platform).

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "job_id": {
   "type": "string"
  },
  "status": {
   "type": "string"
  },
  "thread_id": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/the402-ai-sovereign-execution-engine-purchase-21aea4be/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.the402.ai](https://www.zero.xyz/host/api.the402.ai/llms.txt)