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SHA-256 Base64URL Digest
x402
SHA-256 Base64URL Digest is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Computes a SHA-256 cryptographic hash of input text and returns it encoded as a base64url string, with no network or LLM involvement.
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs a sha256 digest of text, encoded as base64url. No network and no LLM. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/digest-sha256-base64url first.
Output
Returns a base64url-encoded SHA-256 digest of the submitted text. The response is a deterministic, fixed-length string (43 characters without padding) suitable for use in URLs, headers, or anywhere a compact hash representation is needed.
Example use cases
Content integrity fingerprinting
“Compute a SHA-256 base64url digest of this JSON payload so I can use it as an integrity fingerprint before storing it: '{"user":"alice","action":"login","ts":1720000000}'”
Deterministic cache key generation
“I need a short, URL-safe cache key for this long text — hash it with SHA-256 and return the base64url result: 'The quick brown fox jumps over the lazy dog, and other common pangrams used in testing.'”
Password pre-hash before salting
“Take the string 'mysecretpassword123' and give me its SHA-256 digest encoded as base64url so I can use it as a pre-hash step in my key derivation pipeline.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-sha256-base64url?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a SHA-256 hash specifically encoded as base64url (not hex or base32), and you want a deterministic, pure-computation result with no external network calls or LLM inference. Prefer the free sandbox endpoint (/v1/sandbox/digest-sha256-base64url) first; use this paid endpoint when the sandbox is unavailable or rate-limited. Prefer sibling endpoints if you need a different algorithm (blake2b512, blake2s256, md5, ripemd160, sha224) or a different encoding (hex, base32).
Side effects
- Text exceeds 100,000 character limit — returns a 400 or size error
- Missing or empty 'text' field — returns a validation error
- Missing or invalid 'key' field — returns an authentication or payment error
- Payment of $0.001 USDC not completed — returns a 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| key | string | HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored. |
| text | string | Message to digest. For raw-hex SKUs this is hex bytes; for utf16 or latin1 SKUs it is decoded with that encoding. Otherwise it is UTF-8 text. |
Tags
x402
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