# x402 Trust Layer Payment Intent Compiler

> x402 Trust Layer Payment Intent Compiler is a paid API for AI agents from x402trustlayer.xyz, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-30).

Compiles a multi-step downstream execution plan for x402 trust infrastructure APIs, estimating total USDC cost and ordering API calls within a specified budget.

## Facts

- Endpoint: POST https://x402trustlayer.xyz/api/payment-intent/compile?utm_source=zero.xyz
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-trust-layer-payment-intent-compiler-69acdf11
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RhOV0mtJH-8iGVzEZzq0L

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 x402-trust-layer-payment-intent-compiler-69acdf11 -d '<json body>'
```

Example prompt: Can you compile a GET-based x402 trust layer payment intent plan and tell me which API steps to run, in what order, and whether the total estimated cost fits within a $1 USDC budget?

## When to prefer this

Use this endpoint when you need to pre-plan and cost-estimate a sequence of x402 trust layer API calls before executing them — especially when operating under a USDC budget constraint and needing an ordered execution roadmap with guard, router, and receipt-auditor steps. Prefer this over ad-hoc API calls when orchestration, budget compliance, and step sequencing matter.

## Known failure modes

- Invalid or missing 'type' field (must be 'http') returns validation error
- Unsupported HTTP method (only GET, HEAD, DELETE allowed) returns enum violation error
- Budget exceeded results in withinBudget: false with plan still returned
- Service unavailable or upstream routing failure returns non-ok status
- Malformed input object causes schema rejection

## How this service works

68 paid x402 trust infrastructure APIs: guard, semantic escrow, mandate diff, certified seller network, KYM, mandates, compliance, disputes, and orchestration.

## Output

Returns a JSON object with a boolean ok/allowed status, an ordered array of steps (each with path, price in USDC, and purpose), a human-readable plan summary, total estimated USDC cost, whether the plan is within the specified budget, the recommended first step URL, and the suite base URL.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "status",
      "allowed",
      "summary",
      "withinBudget",
      "totalEstimatedUsdc",
      "maxBudgetUsdc",
      "currentEndpointCostUsdc",
      "recommendedFirstStep",
      "planSummary",
      "steps",
      "executionOrder",
      "suiteBaseUrl"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "steps": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "step",
         "path",
         "priceUsdc",
         "purpose"
        ],
        "properties": {
         "path": {
          "type": "string"
         },
         "step": {
          "type": "number"
         },
         "purpose": {
          "type": "string"
         },
         "priceUsdc": {
          "type": "number"
         }
        }
       }
      },
      "status": {
       "type": "string"
      },
      "allowed": {
       "type": "boolean"
      },
      "summary": {
       "type": "string"
      },
      "planSummary": {
       "type": "string"
      },
      "suiteBaseUrl": {
       "type": "string"
      },
      "withinBudget": {
       "type": "boolean"
      },
      "maxBudgetUsdc": {
       "type": "number"
      },
      "executionOrder": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "totalEstimatedUsdc": {
       "type": "number"
      },
      "recommendedFirstStep": {
       "type": "string"
      },
      "currentEndpointCostUsdc": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "steps": [
   {
    "path": "/api/guard/pre-x402",
    "step": 1,
    "purpose": "Spend policy + risk",
    "priceUsdc": 0.05
   },
   {
    "path": "/api/router/route",
    "step": 2,
    "purpose": "Pick marketplace API",
    "priceUsdc": 0.02
   },
   {
    "path": "/api/receipt-auditor/verify",
    "step": 3,
    "purpose": "Verify settlement",
    "priceUsdc": 0.05
   }
  ],
  "status": "ok",
  "allowed": true,
  "summary": "Compiled 3-step downstream plan ($0.12 est.) within $1 budget",
  "planSummary": "Step 1: Guard preflight; Step 2: Route marketplace; Step 3: Verify receipt",
  "suiteBaseUrl": "https://x402trustlayer.xyz",
  "withinBudget": true,
  "maxBudgetUsdc": 1,
  "executionOrder": [
   "POST https://x402trustlayer.xyz/api/guard/pre-x402",
   "POST https://x402trustlayer.xyz/api/router/route",
   "POST https://x402trustlayer.xyz/api/receipt-auditor/verify"
  ],
  "totalEstimatedUsdc": 0.12,
  "recommendedFirstStep": "POST https://x402trustlayer.xyz/api/guard/pre-x402",
  "currentEndpointCostUsdc": 0.15
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-trust-layer-payment-intent-compiler-69acdf11/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402trustlayer.xyz](https://www.zero.xyz/host/x402trustlayer.xyz/llms.txt)