x402 Trust Layer — Pre-x402 Alchemy Guard

x402

x402 Trust Layer — Pre-x402 Alchemy Guard is a paid API for AI agents from x402trustlayer.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-30).

Pre-flight guard check that validates whether a GET, HEAD, or DELETE HTTP request is allowed under x402 trust infrastructure before payment settlement proceeds.

Price / call$0.05

Seller volume →—

Success—

StatusUnknown

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 three fields: 'ok' (boolean indicating the call succeeded), 'allowed' (boolean indicating whether the request is permitted to proceed), and 'summary' (a human-readable explanation of the guard decision). Example: {ok: true, allowed: true, summary: 'Paid response after x402 settlement'}.

Example use cases

Example prompt

“Before I pay to call that x402-protected API endpoint, run a pre-flight guard check on my GET request using the x402 Alchemy guard to confirm it's allowed under the trust layer.”

Technical details

Endpoint

POSThttps://x402trustlayer.xyz/api/guard/pre-x402-alchemy?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to perform a pre-flight authorization check on a read-type HTTP request (GET, HEAD, or DELETE) before committing to an x402 micropayment. It is specifically designed for the x402 trust infrastructure's Alchemy integration and is the right choice when you want to validate whether a request will be permitted before incurring payment costs.

Side effects

Invalid method supplied (only GET, HEAD, DELETE accepted) — likely 400 or validation error
Missing required 'type' or 'method' fields in input object — schema validation failure
Request blocked by guard rules — returns allowed: false with explanatory summary
Payment not settled or insufficient USDC — x402 payment required error
Network or upstream Alchemy integration failure — service unavailable response

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "allowed": true,
    "summary": "Paid response after x402 settlement"
  }
}

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