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Delx Base64 Size Estimate
x402
Delx Base64 Size Estimate is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Estimates the decoded byte size of a base64-encoded string without performing a full decode, returning a deterministic byte count in JSON
Price / call$0.001
Success—
StatusUnknown
How this service works
Estimate decoded byte size of a base64 string without full decode — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls. Sibling of Delx routes that alrea…
Output
A JSON object containing the estimated decoded byte size of the provided base64 string, computed deterministically without performing a full decode. The result is advisory and returned as a machine-readable numeric value representing bytes.
Example use cases
Preflight payload size check
“I'm about to decode this base64 blob and store it, but I want to make sure it won't exceed my 1MB limit first — can you estimate the decoded byte size without fully decoding it? The string is 'SGVsbG8gV29ybGQh...'”
API response size budgeting
“Before I pipe this base64-encoded API response into my processing pipeline, estimate how large it'll be decoded so I know whether to batch it or handle it inline: 'dGhpcyBpcyBhIHRlc3QgcGF5bG9hZA=='”
Memory budget pre-check for agent
“My agent is about to decode several base64 strings and I need to know the total memory footprint in advance — can you estimate the decoded byte size of this one first: 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo='”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/base64-size-estimateWhen to prefer
Choose this endpoint when you need a fast, cheap, stateless estimate of decoded base64 byte size without the overhead of a full decode — ideal for preflight checks, memory budgeting, or size validation before committing to a full decode operation. Prefer this over decoding the string yourself when operating in constrained environments or when you want a deterministic, machine-readable result at minimal cost ($0.001 USDC).
Side effects
- Invalid or malformed base64 string may result in an error or inaccurate estimate
- Empty input string returns zero or an error response
- Base64 strings with incorrect padding may produce unreliable size estimates
- Payment failure via x402 will prevent execution and return a 402 response
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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