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Delx Commerce — JSON String Length Check
x402
Delx Commerce — JSON String Length Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Validates that specified string fields within a JSON object fall within defined minimum and maximum character length bounds.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a result object indicating whether all specified string fields passed the length check, a list of any fields that failed (invalid_fields), an overall status ('pass' or 'fail'), and evidence metadata including a SHA-256 hash of the input for verifiability and confirmation that no data is retained.
Example use cases
API payload field validation
“I'm receiving JSON payloads from users and need to verify that the 'title' and 'description' fields are within bounds — title between 5 and 100 characters, description between 20 and 1000. Can you check this object: {"title": "Hi", "description": "Short"}?”
Form submission string enforcement
“Before I save this user profile to the database, validate that 'display_name' is between 2 and 50 characters and 'tagline' is between 0 and 160 characters in this object: {"display_name": "Alex", "tagline": "Building cool stuff"}”
Data pipeline quality gate
“As part of my data pipeline, I need to confirm that the 'product_code' field in this batch record is exactly between 6 and 12 characters long — here's the object: {"product_code": "AB12", "category": "electronics"}”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/json-string-length-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call, no-signup validation of JSON string field lengths with cryptographic verifiability (SHA-256 input hashing and no data retention guarantees). Prefer it over building custom validation logic when you want an auditable, agent-friendly microservice that returns structured pass/fail results. Ideal for agent pipelines that need to gate on data quality before downstream processing, especially when USDC micropayments via x402 are already integrated.
Side effects
- Field names specified in 'fields' array do not exist in the provided object — returns pass with no violations since no matching fields found
- Non-string field values in the specified fields may not be evaluated correctly
- Input object exceeds 128 properties limit — request rejected
- Fields array exceeds 256 items — request rejected
- Missing or malformed minimum/maximum integers — undefined validation behavior
- Payment failure via x402 protocol — 402 response before computation occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| fields | array | Fields supplied to JSON String Length Check; used only for this bounded calculation and processed in memory without retention. |
| object | object | Object supplied to JSON String Length Check; used only for this bounded calculation and processed in memory without retention. |
| maximum | integer | Maximum supplied to JSON String Length Check; used only for this bounded calculation and processed in memory without retention. |
| minimum | integer | Minimum supplied to JSON String Length Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"passed": true,
"invalid_fields": []
},
"schema": "delx/util-json-string-length-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "e61f8b4c6194a85d31be821c7ddcec01a240fe3d4b33cd76336131c6315185b6",
"external_calls": 0
},
"operation": "data_batch:json_string_length_check"
}
}Tags
x402
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