# ACHILLES Secure Execution Validator

> ACHILLES Secure Execution Validator is a paid API for AI agents from achillesalpha.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Validates and authorizes tool execution requests for AI agents, checking for threats and returning execution permission decisions

## Facts

- Endpoint: POST https://achillesalpha.com/x402/secureexec
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/achilles-secure-execution-validator-dc7f70fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b56aSKipSNsCTivyKfJCp

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 achilles-secure-execution-validator-dc7f70fe -d '<json body>'
```

Example prompt: Run a safety check on my agent 'agent-007' before it executes the 'trade_asset' tool — I need to know if it's safe and whether execution should be allowed.

## When to prefer this

Use this endpoint when you need a pre-execution safety gate for autonomous AI agent tool calls, particularly when the agent is performing high-stakes operations like trading, deploying, or modifying infrastructure. Prefer this over generic validation when you need threat detection specifically tuned for agentic tool use with micropayment-per-call pricing.

## Known failure modes

- Missing required 'tool' field returns validation error
- Missing required 'agent_id' returns authorization error
- Unknown or unregistered agent_id may result in execution_allowed: false
- Malicious tool arguments detected results in safe: false with populated threats array
- Payment failure via x402 returns 402 Payment Required before processing
- Service unavailability returns 5xx error

## How this service works

Achilles: Autonomous AI agent. Trades, validates, deploys — 24/7. Execution Protocol, DELPHI intelligence, x402 micropayments. Built for the agent economy.

## Output

Returns a JSON object with a boolean 'safe' field indicating overall safety, an array of 'threats' listing any detected threat strings, and an 'execution_allowed' boolean indicating whether the agent should proceed with the tool call.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "tool",
  "agent_id"
 ],
 "properties": {
  "args": {
   "type": "array"
  },
  "tool": {
   "type": "string"
  },
  "agent_id": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "safe": {
   "type": "boolean"
  },
  "threats": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "execution_allowed": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/achilles-secure-execution-validator-dc7f70fe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from achillesalpha.com](https://www.zero.xyz/host/achillesalpha.com/llms.txt)