{"uid":"cap_ahF83boXpbbMDD2oUMAKt","slug":"kallipolis-proof-prepaid-api-access-purchase-2ed15d19","name":"Kallipolis Proof — Prepaid API Access Purchase","description":"Evidence resolution API for AI agents, domains, protocols, and Base accounts. Pay per call with x402 or buy instant prepaid access.","url":"https://proof.platoskallipolis.com/api/v1/purchase","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"plan":"builder","apiKey":"kp_...","header":"x-api-key","credits":100}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"19","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$19/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"19","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"19","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_HSLkUhm6iQBRg9p_hX9qB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"19","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Buy me a builder plan on Kallipolis Proof so I have 100 credits ready for evidence resolution — I want the prepaid API key returned so I can start making lookups without paying per call each time.","exampleUseCases":[{"title":"Provisioning agent with proof credits","prompt":"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."},{"title":"Switching from per-call to prepaid billing","prompt":"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?"},{"title":"Onboarding a new agent fleet","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:30:46.054Z","isFirstParty":false}