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Soundex Codes for Agents
x402
Soundex Codes for Agents 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).
Computes the American Soundex phonetic code for a surname-like string, enabling fuzzy name matching, deduplication, and genealogy-style search keys.
Price / call$0.001
Success—
StatusUnknown
How this service works
American Soundex codes. Use for fuzzy name matching, de-dupe heuristics, or genealogy-style search keys. Returns the Soundex code for a surname-like string. $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.
Output
Returns a deterministic American Soundex code (e.g. 'S532') for the input name string — a single letter followed by three digits representing the phonetic signature of the input.
Example use cases
Genealogy surname search key
“Generate the Soundex code for 'Schwartz' so I can search a genealogy database for all phonetically similar spellings like Schwarz, Svartz, or Shwartz.”
Customer record deduplication
“I have two customer records — one with last name 'Thompson' and one with 'Thomson' — can you get the Soundex codes for both so I can check if they're likely duplicates?”
Name normalization for search index
“I'm building a search index and need the Soundex phonetic key for the surname 'Wojciechowski' to group it with similar-sounding entries.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/soundexWhen to prefer
Choose this endpoint when you need a deterministic, first-party phonetic key for a name string with no API key or subscription required. Ideal for lightweight deduplication heuristics, genealogy-style fuzzy search, or any scenario where you need to group name variants by sound. Prefer it over full text-search similarity services when you specifically want the classic American Soundex algorithm and per-call micropayment billing with no overhead.
Side effects
- Input string is empty or missing — returns a structured validation error (not billed)
- Input exceeds 100,000 character limit — returns validation error
- Non-alphabetic or purely numeric input may yield unexpected or degenerate Soundex codes
- Network or payment failure via x402 protocol may prevent call completion
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Primary text input (max 100k chars). Processed first-party; not retained as a dataset. |
Output
Schema · Response
{
"type": "json",
"example": {
"code": "H425",
"input": "HELLOAGENTWORLD",
"schema": "delx/soundex/v1"
}
}Tags
x402
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