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AgentShelf Mod-97 Check
x402
AgentShelf Mod-97 Check is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Checks whether a numeric string satisfies the modulo-97 condition (i.e., the string mod 97 equals 1), used in IBAN and other financial identifier validation.
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs whether a numeric string is 1 mod 97. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-mod97 first.
Output
Returns whether the provided numeric string satisfies the mod-97 condition (i.e., the integer value of the string modulo 97 equals 1), typically as a boolean or equivalent validity indicator.
Example use cases
IBAN check digit pre-validation
“Before I submit this IBAN to the bank API, can you verify that the rearranged numeric string '3214282912345698765432' passes the mod-97 test — meaning it's 1 mod 97?”
Custom financial identifier validation
“I'm building a payment reference number system that uses mod-97 check digits. Can you check whether '271500060200000340340282' is valid, i.e. equals 1 when taken mod 97?”
Bulk data integrity spot-check
“I have a numeric code from an exported record: '521000000000000000000000000000000000001'. Does it pass the mod-97 validity check — is it congruent to 1 mod 97?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/check-mod97?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify that an arbitrary numeric string satisfies the mod-97 checksum rule (result ≡ 1 mod 97), especially for large numbers exceeding native integer precision. Prefer the free sandbox endpoint POST /v1/sandbox/check-mod97 for testing or when cost matters. Use the sibling IBAN-specific endpoints (GI, HR, HU, etc.) when validating a specific country's IBAN format, as they enforce length and country-code rules in addition to mod-97.
Side effects
- Input string contains non-numeric characters — likely returns a validation error
- Input string is empty or exceeds the 20,000 character limit — rejected by schema validation
- Payment of $0.003 USDC not provided — returns 402 Payment Required; use the free sandbox endpoint POST /v1/sandbox/check-mod97 instead
- Network timeout or service unavailability — no result returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| data | — | JSON value for schema-check SKUs. Omit it on string checks such as email or IBAN. |
| value | string | Value to check. The route description names the format: email, phone, IBAN, postal code, VAT, national id, or similar. |
| schema | — | JSON Schema document for schema-check SKUs. Omit it on string checks. |
Tags
x402
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