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CUSIP Check Digit Validator
x402
CUSIP Check Digit Validator is a paid API for AI agents from id-validators.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Validates the check digit of a 9-character CUSIP security identifier and splits it into issuer and issue codes.
Price / call$0.02
Success—
StatusUnknown
How this service works
Validate a 9-character CUSIP security identifier check digit and split issuer and issue codes.
Output
Returns a verdict (valid/invalid), the normalised CUSIP string, the isolated check digit, the issuer code, the issue code, a human-readable summary, reasons for any failure, and a source/asOf timestamp. May also include a disclaimer and a degraded flag if the service is operating in a limited capacity.
Example use cases
Pre-trade security ID verification
“Before I submit this trade, check whether the CUSIP 594918104 is valid and confirm the check digit and issuer code are correct.”
Data pipeline CUSIP sanity check
“I'm ingesting a batch of securities data and one of the CUSIPs looks suspicious — can you validate 459200101 and tell me if it passes the check digit test?”
Splitting CUSIP for regulatory reporting
“I need to report the issuer code and issue code separately from CUSIP 38259P508 — can you parse it out and confirm it's a valid identifier?”
Technical details
Endpoint
GEThttps://id-validators.x402tookit.com/cusip-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically verify the structural integrity of a CUSIP identifier, particularly when you also need the parsed issuer and issue sub-codes. Prefer this over a generic ISIN or LEI validator when the identifier is specifically a 9-character CUSIP (US/Canadian securities). It is the right choice for pre-trade validation workflows, data ingestion pipelines, and regulatory reporting preparation.
Side effects
- CUSIP is not exactly 9 characters — returns invalid verdict with reasons
- Invalid characters in CUSIP string — returns invalid verdict with reasons
- Check digit mismatch — returns invalid verdict explaining the expected vs actual digit
- Missing required query parameter 'id' — returns an error response
- Service degraded — returns degraded flag true with partial results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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