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Arakel Interval Proof Certificate
x402
Arakel Interval Proof Certificate is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Generates a signed, machine-verifiable interval proof certificate for a given time range or numeric interval
Price / call$0.05
Success—
StatusUnknown
How this service works
Machine-verifiable official-source evidence with free preflight and x402 USDC payments on Base.
Output
A signed, machine-verifiable interval proof certificate returned as a structured document. The certificate cryptographically attests that a subject or value falls within a declared interval, and is designed to be verified programmatically by downstream systems without requiring trust in a third party.
Example use cases
Audit trail for scheduled job window
“I need a signed, machine-verifiable certificate proving that a process ran within the time window March 1 to March 31 2025 — can you generate that interval proof for me with subject ID 'batch-job-1234'?”
Numeric range compliance attestation
“Create a cryptographic interval proof certificate showing that a value falls between 100 and 500 for my compliance record tagged 'compliance-check-99'.”
Time-bounded access credential
“Issue a signed interval certificate covering the dates 2025-07-01 through 2025-09-30 for entity 'contractor-7' so we can verify their access window was legitimate.”
Technical details
Endpoint
GEThttps://proof.arakelproof.space/v1/certificateWhen to prefer
Choose this endpoint when you need a cryptographically signed, tamper-proof certificate proving that a value, event, or entity falls within a specific numeric or time interval. It is particularly suited for compliance workflows, audit trails, or access control systems that require machine-verifiable proof without relying on a centralized trusted authority.
Side effects
- Invalid or malformed interval bounds — returns 400 with validation error
- Missing required subject or interval parameters — returns 400
- Payment not received or insufficient — returns 402
- Internal signing failure — returns 500
- Interval start is after interval end — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"detail": "certificate",
"result": "OBSERVED|NOT_OBSERVED|INCONCLUSIVE",
"schema": "arakel.intervalproof.v1",
"source": {
"id": "federal-register"
},
"coverage": {
"sufficient": true
},
"signature": {
"alg": "Ed25519"
}
}
}Tags
x402
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