Free static example · no wallet required
Structured data contract
Inspect the exact response envelope first. When you need current analysis for your own input, one successful x402 call costs $0.035 USDC on Base or Solana.
No accountNo subscriptionExact USDC priceFresh calls only are paid
Full response envelope
What you receive
Demonstration data only. The paid endpoint returns a fresh result and settlement receipt.
{
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
"service": "data.contract",
"version": "1",
"data": {
"normalized": {
"sourceFormat": "json",
"format": "json",
"rootMode": "records",
"content": "[\n {\n \"name\": \"Ada\",\n \"score\": 98\n }\n]",
"records": 1,
"inputSha256": "c643e5c255c8922bcd1163746ad6233618735d05482f8d2fa68e30021648f076",
"outputSha256": "8ac612942f0f956fd991cf6c56221845102bb2aa773182f2a76044811c027982",
"normalization": {
"version": "apiacre-data-contract-normalization/1",
"sourceRoot": "array",
"nodesProcessed": 4,
"nonStringKeysNormalized": 0,
"dateTimeScalarsNormalized": 0,
"outputEncoding": "json-indent-2-utf8",
"deterministic": true,
"networkRequestsMade": 0
},
"warnings": []
},
"contract": {
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "array",
"x-apiacre-observed": {
"sampleCount": 1,
"presentCount": 1,
"missingCount": 0,
"nullCount": 0,
"types": [
"array"
],
"arrayLength": {
"minimum": 1,
"maximum": 1
}
},
"items": {
"type": "object",
"x-apiacre-observed": {
"sampleCount": 1,
"presentCount": 1,
"missingCount": 0,
"nullCount": 0,
"types": [
"object"
]
},
"properties": {
"name": {
"type": "string",
"x-apiacre-observed": {
"sampleCount": 1,
"presentCount": 1,
"missingCount": 0,
"nullCount": 0,
"types": [
"string"
],
"stringLength": {
"minimum": 3,
"maximum": 3
}
}
},
"score": {
"type": "integer",
"x-apiacre-observed": {
"sampleCount": 1,
"presentCount": 1,
"missingCount": 0,
"nullCount": 0,
"types": [
"integer"
]
}
}
},
"required": [
"name",
"score"
]
}
},
"input": {
"format": "json",
"rootMode": "records",
"records": 1,
"characters": 46,
"utf8Bytes": 46,
"sha256": "8ac612942f0f956fd991cf6c56221845102bb2aa773182f2a76044811c027982"
},
"inference": {
"version": "apiacre-schema-inference/3",
"dialect": "https://json-schema.org/draft/2020-12/schema",
"csvNumericStringsCoerced": false,
"csvEmptyStringsAsNull": false,
"tabularNumericStringsCoerced": false,
"tabularEmptyStringsAsNull": false,
"nodesProcessed": 4,
"nonStringKeysNormalized": 0,
"dateTimeScalarsNormalized": 0,
"observedBoundsEnforced": false,
"maximumDepth": 20,
"complete": true,
"warnings": []
}
},
"validation": {
"valid": true,
"schemaValid": true,
"instanceValid": true,
"errorCount": 0,
"errorCountExact": true,
"errorsReturned": 0,
"errorsTruncated": false,
"errors": [],
"schema": {
"dialect": "https://json-schema.org/draft/2020-12/schema",
"declaredDialect": "https://json-schema.org/draft/2020-12/schema",
"utf8Bytes": 699,
"sha256": "2fbbfba7d86b6f96e4d91b6f1ae294331ef1efbad9aeae06bdd9da8a65470041",
"remoteReferencesAllowed": false
},
"instance": {
"utf8Bytes": 27,
"sha256": "a690ea0e5beee5262d5ed4ffb7a1ea493ea6c8437d9171299be88c29b34259ce"
},
"validation": {
"engine": "python-jsonschema",
"engineVersion": "4.26.0",
"draft": "2020-12",
"formatChecking": true,
"maxErrors": 25,
"networkRequestsMade": false
}
},
"pipeline": {
"version": "apiacre-data-contract/1",
"steps": [
"normalize-to-json",
"infer-draft-2020-12",
"validate-instance"
],
"singlePaymentAuthorization": true,
"deterministic": true,
"networkRequestsMade": 0
}
},
"meta": {
"duration_ms": 42,
"cached": false,
"sources": [],
"warnings": [],
"next_actions": []
}
}Example request
Input JSON
{
"content": "[{\"name\":\"Ada\",\"score\":98}]",
"format": "json",
"root_mode": "records",
"instance": [
{
"name": "Lin",
"score": 91
}
],
"max_errors": 25,
"check_formats": true
}Delivery contract
One paid POST
Normalize caller-supplied CSV, TSV, JSON, JSON Lines, or YAML to deterministic JSON, infer a Draft 2020-12 schema from that normalized value, and validate one future JSON value in a single x402 call.
POST /v1/data/contract
Need current data?
Run this exact service.
The checkout verifies the request, selected network, USDC asset, recipient, and price before opening a wallet.