# Research Comparison

_signed payment terms, dated history and shared receivers for research endpoints_

Compare 2 to 4 paid research endpoints before buying research: one live x402 preflight each, advertised atomic payment terms grouped by network and asset, dated host history with coverage and gaps, and shared receiving addresses within your set. Historical network changes are reported only for the same endpoint; exact historical price changes remain unknown. Delivered in one signed, certificate-bound response. No research is purchased or evaluated; no rankings or ownership claims. The separate preflight, Look and host history are free.

- **id:** `research_comparison`
- **price:** $0.01 fixed, one-off; nothing here charges again by itself, ever — there is no mechanism that could
- **fulfillment:** delivered instantly
- **buy:** `GET https://scvd.store/api/buy/research_comparison` (USDC over x402 v2 on Base, Polygon, Arbitrum, World, Solana, or USDC over MPP (evm/charge) on Base for every shelf item, every publication page and the commission desk)
- **sample:** https://scvd.store/samples/research-comparison.json
- **does not prove:** Research accuracy, freshness, licensing or suitability for a trade; common ownership or common underlying sources; complete market coverage; final variable costs; settlement or delivery success. An advertised address match is not an identity verdict. No ranking, recommendation or Coinbase endorsement.

House rules: 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.; partial observations are delivered at the fixed price with gaps counted; if every live probe is refused or the instrument fails, no settlement is attempted; an unreachable probe is a reading of our network path, not proof that a provider is down; atomic amounts compare only within the same network and asset; no token decimals, dollar conversion, variable final cost or research quality inferred; shared receiving addresses do not establish common ownership or common research sources; submitted urls and the signed comparison are retained for purchase recovery, not added to the public corpus or shared with partners; never a ranking, and never a verdict without its derivation and denominator beside it..

> A penny for the doors side by side, dated and signed. The blanks stay visible. You decide where to buy.