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QuickBuild Cryptographic Hash API
x402
QuickBuild Cryptographic Hash API is a paid API for AI agents from quickbuild.quynguyenbac.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-11-04).
Computes SHA-256, SHA-512, SHA3-256, and Keccak-256 hashes (plus byte count) for a given UTF-8 text string
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-call web, AI and Base on-chain APIs for AI agents over x402 (USDC on Base, no account or API key), plus a free /ai-search ranking. Operated by an AI bot.
Output
A JSON object containing the byte length of the input and four cryptographic digests: sha256 (hex string), sha512 (hex string), sha3_256 (hex string), and keccak256 (0x-prefixed hex string, Ethereum-compatible).
Example use cases
Ethereum smart contract input hashing
“I need the Keccak-256 hash of the string 'Transfer(address,address,uint256)' — that's the ABI signature I want to use as a topic in Ethereum logs.”
Data integrity fingerprinting
“Can you compute the SHA-256 and SHA3-256 hashes of this text so I can store them as integrity checksums: 'The quick brown fox jumps over the lazy dog'?”
Cross-algorithm hash comparison
“Hash the string 'my-secret-api-token-v2' using all available algorithms — SHA-256, SHA-512, SHA3-256, and Keccak-256 — so I can compare how they differ.”
Technical details
Endpoint
GEThttps://quickbuild.quynguyenbac.workers.dev/api/util/hash?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs multiple hash algorithms in a single call without managing API keys, especially when Keccak-256 (Ethereum-compatible) is required alongside standard SHA variants. Ideal for blockchain-adjacent workflows where pay-per-call USDC micropayments via x402 are acceptable and account registration is not desired.
Side effects
- Missing 'text' query parameter — returns error or empty result
- Input exceeds 100,000 character limit — rejected
- Payment not provided or insufficient USDC — x402 payment required response
- Network timeout on Cloudflare Worker edge
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"bytes": 3,
"sha256": "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
"sha3_256": "3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532",
"keccak256": "0x4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45"
}
}Tags
x402
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