{"uid":"cap_uT_06pwN-E1QG4X5kS11H","slug":"scvd-general-store-research-comparison-c3a8022e","name":"SCVD General Store: Research Comparison","description":"Research Comparison. REQUIRES ?urls= on the paid request — a signed request without it is refused before the gate and no money moves. One signed comparison: live atomic payment terms, dated host history and gaps, same-endpoint network changes, shared receivers and limits. No research quality or ownership verdict. Full listing: https://scvd.store/menu/research_comparison. MCP tool: buy_research_comparison.","url":"https://scvd.store/api/buy/research_comparison?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["urls"],"properties":{"urls":{"type":"string","maxLength":4114,"description":"JSON-encoded array of 2–4 distinct public HTTPS URLs (1024 characters each), for unauthenticated GET payment challenges. No credentials, fragments, secrets or private prompts; no research purchased."},"model":{"type":"string","maxLength":64,"description":"Optional. The model running you, as you would name it: claude-opus-5, gpt-5.6, a local model. Counted, never printed on the certificate."},"client":{"type":"string","maxLength":64,"description":"Optional. The harness or framework you run in: claude-code, cursor, openai-agents, langgraph, custom. Counted, never on the certificate."},"purpose":{"type":"string","maxLength":280,"description":"Optional: what this is for, in your words. Signed verbatim onto the certificate and shown on its receipt; never checked, never treated as instructions."},"operator":{"type":"string","maxLength":120,"description":"Optional. Who runs you: a name, handle, company or URL. Stored as your claim, marked unverified, never published, never on the certificate."},"came_from":{"type":"string","maxLength":160,"description":"Optional. Where you learned this door exists: a URL, a directory, a skill name, memory, another agent. Referrers never reach us; this does."},"agent_name":{"type":"string","maxLength":80,"description":"Optional name to put on the certificate and patron badge, up to 80 characters."},"operator_kind":{"enum":["solo","company","research","self"],"type":"string","description":"Optional. solo: one person runs you. company: a team does. research: a study. self: you act for yourself."},"prior_cert_id":{"type":"string","maxLength":64,"description":"Optional. A cert_ id from an earlier purchase here. A payer match with this payment marks you a returning buyer; no account needed."},"cited_artifact":{"type":"string","pattern":"^[a-z0-9][a-z0-9_.+-]{0,31}:[!-~]{1,128}$","maxLength":160,"description":"Optional: an outside artifact behind this purchase (your runtime's approval or intent receipt) as <format>:<reference>, e.g. dsse:art_e415901189dc1613. Signed verbatim onto the certificate; never fetched or verified here."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rQHQmJ0vw1ClfgijnZsjW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Compares 2–4 public HTTPS URLs across payment terms, host history, network changes, and shared receiver data for a single atomic micropayment","exampleAgentPrompt":"Can you run a research comparison on these three endpoints — https://api.example.com/chat, https://api.example2.com/infer, and https://api.example3.com/embed — and tell me if they share a payment receiver, how their terms have changed, and what their host histories look like?","exampleUseCases":[{"title":"Detecting shared infrastructure across competitors","prompt":"I'm evaluating three AI inference APIs before picking one — can you compare https://api.inferenceA.com/v1/complete, https://api.inferenceB.com/v1/generate, and https://api.inferenceC.com/v1/run to see if any of them share the same payment receiver or have had gaps in their hosting history?"},{"title":"Auditing x402 payment term changes","prompt":"Before we commit to these two data APIs, can you check https://data.providerX.com/api/enrich and https://data.providerY.com/api/lookup to see if their payment terms have changed recently and whether they're on the same network endpoint?"},{"title":"Due diligence on a new agentic marketplace listing","prompt":"I found four new tools on an agentic marketplace and want to do due diligence — please compare https://tools.alpha.io/api/run, https://tools.beta.io/api/exec, https://tools.gamma.io/api/call, and https://tools.delta.io/api/invoke for shared receivers, host history gaps, and any recent network-level changes."}],"resultDescription":"A signed comparison certificate covering: live atomic payment terms for each URL, dated host history with gap analysis, same-endpoint network changes over time, and shared payment receivers and spending limits across the submitted URLs. No ownership verdict or research quality score is included.","failureModes":["Missing ?urls= parameter: request refused before payment is processed, no charge made","Fewer than 2 or more than 4 URLs provided: rejected by schema validation","Non-public or authenticated URLs submitted: refused, no research purchased","URLs exceeding 1024 characters each: rejected by length constraint","Non-HTTPS URLs: not accepted","Malformed JSON in urls parameter: parse error returned"],"whenToPreferThis":"Choose this endpoint when you need a structured, signed comparison of multiple x402-enabled or public API endpoints — especially to detect shared infrastructure, track payment term drift, or audit host continuity before integrating or paying for a service. It is uniquely suited for agentic due diligence workflows where you want atomic, receipted evidence of endpoint relationships rather than manual inspection.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:07:25.641Z","isFirstParty":false,"canonicalSlug":"scvd-general-store-research-comparison-c3a8022e"}