Crypto Math
crypto-math.x402tookit.com · 10 paid endpoints · listed 2026-11-02
RSA public key arithmetic: modulus bits, exponent validity, NIST strength; or a labelled toy RSA with tiny primes.
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| GET | crypto-math.x402tookit.com/check-digits Generate or validate Luhn and ISO 7064 mod 97-10 (IBAN style) check digits from the string you supply. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/crt Solve x = a1 (mod m1), x = a2 (mod m2), ... with the Chinese remainder theorem, coprime or not. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/ec-params secp256k1, P-256 and P-384 public parameters (p, n, G) from SEC 2, with an on-curve check of a public point. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/encoding Convert public bytes between hex, base64 and base64url (RFC 4648) with strict decoding and expected-length check. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/entropy Shannon entropy in bits per symbol from a frequency table, plus min-entropy, collision entropy and efficiency. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/gcd-extended gcd, lcm and extended-Euclid Bezout coefficients of two integers, plus gcd/lcm of up to 20 more. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/mod-inverse Modular multiplicative inverse of a mod m, or the gcd that proves none exists. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/mod-pow Modular exponentiation base^exp mod m for big integers, decimal or 0x hex, up to 4096 bits. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/prime Primality test (deterministic Miller-Rabin below 2^64) plus the next and previous prime, with BigInt. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | crypto-math.x402tookit.com/rsa-arith RSA public key arithmetic: modulus bits, exponent validity, NIST strength; or a labelled toy RSA with tiny primes. | $0.02 | Polygon, Arbitrum, Base, Solana |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| Not checked yet. | ||||
Income on Base (7 days)
This provider's payout address is shared by several providers, so its income is not shown as its own.
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<a href="https://logicnodes.io/observatory/p/crypto-math.x402tookit.com"><img src="https://logicnodes.io/observatory/badge/crypto-math.x402tookit.com.svg" alt="x402 status"></a>
Claim it for free with
x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/crypto-math.x402tookit.com