{"uid":"cap_pOIn38oxRpJopafbrF8vr","slug":"witnessd-credits-purchase-67071fcc","name":"witnessd Credits Purchase","description":"Pay a few cents to have any URL or API response independently fetched, hashed, timestamped and archived by a neutral third party. Merkle-anchored on Base. Built for AI agents; useful to humans.","url":"https://witnessd.vip/api/credits?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"api_key":"wk_…","credits_cents":100}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_FsJMPRW81QfSSOGXcFVl6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Purchase API credits for the witnessd neutral-witness service by paying $1 USDC, receiving an API key and credit balance in return.","exampleAgentPrompt":"I want to start using witnessd to independently archive and timestamp URLs — can you purchase $1 worth of credits so I get an API key to use?","exampleUseCases":[{"title":"Bootstrap agent web-witnessing workflow","prompt":"Set up witnessd for my agent pipeline — buy credits so we have an API key ready to start independently fetching and Merkle-anchoring API responses on Base."},{"title":"Fund account for legal evidence archiving","prompt":"I need to preserve some web pages as neutral third-party evidence — can you pay for witnessd credits so I get an API key to start archiving those URLs with timestamps?"},{"title":"Activate witnessd for AI output verification","prompt":"I want to use witnessd to independently verify and hash AI-generated API responses — purchase the credits package so I have a working API key."}],"resultDescription":"Returns a JSON object containing a witnessd API key (prefixed 'wk_…') and a credit balance expressed in cents (e.g. credits_cents: 100), which can then be used to call witnessd's witnessing endpoints.","failureModes":["Payment not received or insufficient USDC — returns payment error or 402","Malformed request body (wrong bodyType or missing required fields) — returns 400 validation error","Network or blockchain confirmation timeout — credits may not be issued immediately","Duplicate payment attempts may not result in duplicate credits — idempotency not guaranteed"],"whenToPreferThis":"Use this endpoint when you need to obtain a witnessd API key and fund your credit balance before making any witness/archive requests. This is the entry-point/onboarding endpoint — call it once before using any other witnessd capabilities. Prefer this over generic archiving services when you need Merkle-anchored, blockchain-timestamped, neutral third-party provenance on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:37:01.332Z","isFirstParty":false,"canonicalSlug":"witnessd-credits-purchase-67071fcc"}