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SHA-256/384/512, Hex, Base64, Base64URL & CRC32 Hash Tool
x402
SHA-256/384/512, Hex, Base64, Base64URL & CRC32 Hash Tool is a paid API for AI agents from sigtap-outreach-api.sigtap.workers.dev, paid per call via x402, $0.0005/call, status unknown (last checked 2026-09-15).
Computes SHA-256, SHA-384, SHA-512 hashes, hex encoding, base64, base64url, and CRC32 checksum of a UTF-8 input string in a single call
Price / call$0.0005
Success—
StatusUnknown
How this service works
Paid micro-utilities for cold-email outreach agents: domain deliverability audits, cold-email grading, template generation, plus a tools toolbox (hashing, JWT decode, IDs, slugs, JSON, regex, crypto prices, domain age, weather). Paid via x402 (USDC on Base). One signature per call. No keys. FREE CHECK: GET /preview/<paid-path> (same URL with /preview/ prefix) returns a 200 demo sample - verify output shape before paying. PAID CALL: GET the url -> 402 challenge -> sign + retry with X-PAYMENT -> settled on-chain (USDC, Base). Ready-to-paste client: GET /llms.txt section "Pay in one call". Catalog+MCP twin: /llms.txt.
Output
Returns a JSON object containing: hex encoding, CRC32 checksum (hex), base64, base64url, SHA-256, SHA-384, SHA-512 digests (all hex-encoded), plus character length and byte length of the input string.
Example use cases
Password token integrity check
“Hash the string 'mysecretpassword123' using SHA-256 and also give me its base64 encoding so I can compare it against a stored value.”
API payload fingerprinting
“I need to fingerprint this JSON payload before sending it — can you compute the SHA-512 and hex encoding of the string '{"user":"alice","action":"login"}'?”
CRC32 checksum for file chunk
“Give me the CRC32 checksum and byte length of the text 'The quick brown fox jumps over the lazy dog' so I can verify chunk integrity.”
Technical details
Endpoint
GEThttps://sigtap-outreach-api.sigtap.workers.dev/tools/hashWhen to prefer
Choose this endpoint when you need multiple hash or encoding formats for the same string in a single round-trip (SHA-256/384/512 + hex + base64 + CRC32 simultaneously). Prefer it over separate hashing libraries when operating in an agent context without local compute, or when you want a quick trustworthy external hash without importing crypto dependencies. Particularly useful when you need both a cryptographic hash and a CRC32 checksum together for dual-purpose integrity checking.
Side effects
- Missing required 'input' query parameter returns an error
- Non-UTF-8 or binary input may produce unexpected results since the endpoint operates on UTF-8 strings
- Very long strings may hit Cloudflare Worker request size limits
- Payment failure (x402) returns a 402 status before computation occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"example": {
"hex": "68656c6c6f",
"crc32": "3610a686",
"base64": "aGVsbG8=",
"length": 5,
"sha256": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
"sha384": "59e1748777448c69de6b800d7a33bbfb9ff1b463e44354c3553bcdb9c666fa901a1a751c9fb642405954b1ed74a74210",
"sha512": "9b71d224bd62f3785d96d46ad3ea3d73319bfbc2890caadae2dff72519673ca72323c3d99ba5c11d7c7acc6e14b8c5da0c4663475c2e5c3adef46f73bcdec043",
"base64url": "aGVsbG8",
"byte_length": 5
}
}Tags
x402
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