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Delx Is Blank
x402
Delx Is Blank is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-21).
Detects whether a given string is blank or contains only whitespace characters, returning a deterministic JSON result
Price / call$0.001
Success—
StatusUnknown
How this service works
Check whether a string is empty or contains only whitespace. Call when you need this bounded result before handing data to a downstream tool. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Honest limit: execution uses only caller-supplied data in memory; it does not call a paid upstream, retain input, search the web, read a live RPC, or invoke a media generator. Results are advisory; the caller owns authorization, budgets, and production controls.
Output
A deterministic machine-readable JSON object indicating whether the input text is blank (empty or whitespace-only), suitable for use in agent preflight logic and conditional branching without any state retention.
Example use cases
Preflight guard before paid LLM call
“Before sending this user-submitted summary field to the language model, check if the text '\t\n ' is blank or whitespace-only so I don't waste tokens on an empty input.”
Form validation before database write
“I'm about to save a user's comment to the database — can you check if ' ' is blank or whitespace-only before I commit it?”
Pipeline step to skip empty queue items
“I have a queue item with the content field set to ' ' — run a blank check on it so the agent can decide whether to skip it or proceed with processing.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/is-blank?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a stateless, cheap ($0.001 USDC), machine-readable blank/whitespace check before invoking more expensive downstream services. Ideal for agent preflight guards where you want to avoid paying for LLM calls, database writes, or other operations on empty input. Prefer this over implementing local string logic when you want a standardized, auditable micro-utility in your pipeline.
Side effects
- Missing 'text' field in request body returns an error response
- Non-string input types may cause a validation error
- Payment failure via x402 prevents execution
- Network timeout on the remote endpoint
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input field: text. |
Output
Schema · Response
{
"type": "json",
"example": {
"blank": true,
"length": 3,
"schema": "delx/util-is-blank/v1",
"whitespace_only": true
}
}Tags
x402
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