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Delx Commerce — Base64 Size Estimator
x402
Delx Commerce — Base64 Size Estimator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Estimates the decoded byte size of a base64-encoded string by analyzing its padding and character count
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 JSON object with 'ok' (boolean), 'schema' (version identifier string), 'padding' (number of '=' padding characters in the base64 string), 'encoded_chars' (total character count of the base64 input), and 'decoded_bytes_estimate' (estimated byte count of the decoded data).
Example use cases
Pre-check image payload size
“I have this base64 encoded image string — 'iVBORw0KGgoAAAANSUhEUgAA...' — can you tell me how many bytes it will be once decoded so I know if it's too large to store?”
Validate API response payload
“Before I decode this base64 blob from the API response, can you estimate how many decoded bytes it contains? The string is 'dGhpcyBpcyBhIHRlc3Q='.”
Audit base64 data before upload
“I need to know the decoded byte size of 'YWJjZGVmZ2hpamtsbW5vcA==' before uploading it — can you check the padding and give me the estimated size?”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/base64-size-estimate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, lightweight estimate of a base64 string's decoded byte size without actually decoding it — useful for pre-flight checks before storage, memory allocation, or bandwidth planning. It is ideal for agents that need to reason about data size in pipelines involving base64-encoded content such as images, files, or API payloads, and want a pay-per-use model with no signup friction.
Side effects
- Invalid or malformed base64 string may return unexpected estimates or an error
- Empty string input may cause a zero or null result
- Non-base64 characters in input may lead to incorrect padding/size calculations
- Payment failure via x402 protocol will block the request from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| base64 | string | Input field: base64. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"schema": "delx/util-base64-size-estimate/v1",
"padding": 1,
"encoded_chars": 8,
"decoded_bytes_estimate": 5
}
}Tags
x402
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