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Ed25519 Receipt Verification
x402
Ed25519 Receipt Verification is a paid API for AI agents from www.mahastrategies.com, paid per call via x402, $0.012501/call, status unknown (last checked 2026-10-28).
Verifies a single Ed25519 cryptographic signature over up to 8,000 characters of exact UTF-8 receipt text using a caller-supplied 32-byte public key, returning cryptographic validity and message hash.
Price / call$0.012501
Success—
StatusUnknown
How this service works
Verify one Ed25519 signature over up to 8,000 characters of exact UTF-8 receipt text using a supplied 32-byte public key. Returns cryptographic validity and message hash. Does not establish issuer identity, trusted time, licensing or the truth of the receipt. No private keys accepted. New modular adapter: retained result recovery for 24 hours, minimal receipt metadata for 90 days. Existing live route unchanged.
Output
Returns whether the Ed25519 signature is cryptographically valid for the supplied message and public key, along with the hash of the message. Does not confirm issuer identity, trusted timestamp, licensing status, or the truthfulness of the receipt contents. Results are retained for 24 hours and minimal receipt metadata for 90 days.
Example use cases
Payment receipt authenticity check
“I received a payment receipt and want to confirm it hasn't been tampered with — the message text is 'Invoice #8821 amount 150 USDC paid 2024-05-30', here's the Ed25519 public key base64 and signature base64 from the sender, please check if the cryptographic signature is valid using exact-utf8 encoding and treat the data as public.”
Automated invoice signature audit
“As part of our invoice processing, verify the Ed25519 signature on this vendor receipt: message is 'Vendor: Acme Corp, Total: $2,340.00, Date: 2024-06-15', public key is 'ABCD1234pubkey==', signature is 'XYZsig789==', encoding exact-utf8, data class public — tell me if the signature checks out and give me the message hash.”
Synthetic receipt integrity test
“I'm running a QA test with a synthetic receipt — please verify the Ed25519 signature where the message is 'TEST-RECEIPT-001 amount 0.00', public key base64 is 'testPubKey44chars==', signature base64 is 'testSig88chars==', encoding is exact-utf8, and mark the data class as synthetic.”
Technical details
Endpoint
POSThttps://www.mahastrategies.com/api/v1/verify/receipts/signature?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to verify a single Ed25519 digital signature over a short-to-medium UTF-8 receipt or document text using a caller-supplied public key, without needing issuer identity resolution, timestamp authority, or licensing checks. Prefer this over general-purpose signature libraries when you need a hosted, pay-per-call verification service that returns a message hash alongside validity, and when the receipt text fits within 8,000 characters.
Side effects
- Invalid or malformed base64 public key (wrong length or format)
- Signature base64 exceeds 88-character limit or is malformed
- Message text exceeds 8,000 character limit
- Signature is cryptographically invalid for the given message and public key
- Unsupported encoding value other than 'exact-utf8'
- Private key supplied instead of public key (rejected by design)
- Missing required fields such as message, publicKeyBase64, or signatureBase64
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| message | string | |
| encoding | string | |
| dataClass | string | |
| publicKeyBase64 | string | |
| signatureBase64 | string |
Tags
x402
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