Buyer-controlled x402 recipe

Infer and enforce a JSON data contract

Infer a Draft 2020-12 contract from representative records, then validate a future JSON value with bounded, machine-readable error pointers.

2separately authorized steps

$0.035maximum listed total · USDC

eip155:8453Base network

Review quote and start step 1 Copy exact recipe JSON

$0.025 USDC · separate authorization

Schema inference

Infer a reusable schema from representative structured records.

POSThttps://apiacre.com/v1/data/schema

Input template

{
  "content": "$json($representativeRecords)",
  "format": "json",
  "root_mode": "records"
}

Use this result

Pass result.data.schema to the validation step.

Review quote and run step 1 API documentation Inspect free sample

$0.01 USDC · separate authorization

JSON Schema validation

Validate a future JSON value against the inferred contract.

POSThttps://apiacre.com/v1/data/schema-validate

Input template

{
  "schema": "$step1.result.data.schema",
  "instance": "$futureJsonValue",
  "max_errors": 25,
  "check_formats": true
}

Use this result

Require result.data.valid and inspect result.data.errors when false.

Review quote and run step 2 API documentation Inspect free sample

You stay in control. Each step is an independent API call. Inspect its HTTP 402 challenge, authorize no more than the displayed price, verify the result, and continue only when the output is suitable. The listed total is not a bundle charge.