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Agentshelf CSPRNG Random Value Generator
x402
Agentshelf CSPRNG Random Value Generator is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-20).
Generates cryptographically secure random integers, byte strings, or list selections using local CSPRNG with no network or seed dependency
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs a CSPRNG value from local crypto. mode is int, bytes, or choice. bytes n is at most 64. choice picks from a comma-separated list of at most 100 items, with optional shuffle. An audit id is returned. There is no seed. No network. Send JSON {"mode":"int","min":1,"max":10}. Exact $0.001 USDC on Base. Try unpaid POST /v1/sandbox/random first.
Output
Returns a JSON object containing the generated random value (integer, hex/base64 byte string, or chosen item), optionally a shuffled copy of the input list when mode is choice with shuffle enabled, and a unique audit ID string for traceability. No seed is accepted or returned.
Example use cases
Fair lottery winner selection
“I have a list of 10 contestants — alice,bob,carol,dave,eve,frank,grace,heidi,ivan,judy — can you securely pick one at random using a cryptographic RNG?”
Session nonce generation
“Generate 32 cryptographically secure random bytes encoded as hex that I can use as a nonce for a new user session.”
Randomized quiz question order
“Shuffle this list of quiz topics for me using a CSPRNG: math,science,history,geography,art,music,sports,literature”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/random?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need verifiable, audit-trailed cryptographic randomness for integers, raw bytes, or list selection without any seed, network entropy source, or LLM involvement. It is ideal when tamper-evidence (via audit ID) matters, when you need up to 64 random bytes for nonces or tokens, or when you want a provably fair pick from a discrete set. Prefer alternatives if you need large volumes of random data, seeded/reproducible sequences, or randomness integrated into a broader statistical computation.
Side effects
- min greater than max for int mode returns a validation error
- n exceeding 64 for bytes mode is rejected
- items list exceeding 100 entries or any item exceeding 64 characters is rejected
- missing required fields for the selected mode (e.g. no min/max for int) returns a 400 error
- insufficient USDC payment results in 402 Payment Required; use /v1/sandbox/random for unpaid testing
- invalid encoding value (not hex or base64) returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| n | integer | Byte count for mode bytes. Example: 16. Minimum 1. Maximum 64. |
| max | integer | Inclusive upper bound for mode int. Example: 10. Must be greater than or equal to min. Required for int. |
| min | integer | Inclusive lower bound for mode int. Example: 1. A safe integer. Required for int. Not a seed. |
| mode | string | Random mode. int is the default. bytes returns n random bytes. choice picks from items. Example: int. |
| items | string | Comma-separated choices for mode choice. Example: red,green,blue. At most 100 items, each at most 64 characters. No seed. |
| shuffle | boolean | When true with mode choice, also return a shuffled copy of items. Example: false. Default is false. |
| encoding | string | Encoding for mode bytes. hex is the default. base64 is also accepted. Example: hex. |
Tags
x402
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