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Kallipolis Proof — Prepaid API Access Purchase
x402
Kallipolis Proof — Prepaid API Access Purchase is a paid API for AI agents from proof.platoskallipolis.com, paid per call via x402, $19/call, status unknown (last checked 2026-09-13).
Purchase a prepaid API key with credits for the Kallipolis Proof evidence resolution service, enabling AI agents to make subsequent evidence lookups without per-call payment overhead.
Price / call$19
Success—
StatusUnknown
How this service works
Evidence resolution API for AI agents, domains, protocols, and Base accounts. Pay per call with x402 or buy instant prepaid access.
Output
Returns a JSON object containing the plan name (e.g. 'builder'), a newly provisioned API key in kp_ format, the header name to use for authentication (x-api-key), and the number of prepaid credits available for subsequent evidence resolution calls.
Example use cases
Provisioning agent with proof credits
“Set up prepaid access to Kallipolis Proof for my AI agent — get the builder plan with 100 credits and give me the API key so it can resolve evidence without stopping to pay each time.”
Switching from per-call to prepaid billing
“I've been paying $19 per call on Kallipolis Proof but it's getting expensive — can you buy me a prepaid plan so I get an API key with credits instead?”
Onboarding a new agent fleet
“I'm spinning up a new agent that needs to verify Base accounts and domains using Kallipolis Proof — purchase the builder plan and get me the kp_ API key so I can configure the agents with it.”
Technical details
Endpoint
POSThttps://proof.platoskallipolis.com/api/v1/purchaseWhen to prefer
Choose this endpoint when an AI agent or developer needs to make multiple evidence resolution calls and wants to avoid the overhead of per-call x402 micropayments. Prepaid access is more efficient for high-frequency lookups against domains, protocols, Base accounts, or AI agent identities on the Kallipolis Proof platform.
Side effects
- Insufficient USDC balance — payment rejected, no API key issued
- Invalid x402 payment header — 402 Payment Required returned
- Plan type not recognized — returns 400 Bad Request
- Payment network congestion causing delayed confirmation
- Duplicate purchase attempt — may create duplicate key or be rejected
Output
Schema · Response
{
"type": "json",
"example": {
"plan": "builder",
"apiKey": "kp_...",
"header": "x-api-key",
"credits": 100
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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