Pulsefeed X402 vs Sigrank MCP

x402_working_services

List x402 agent-payment services that are currently ALIVE and return a valid x402 challenge, ranked by trust score. About 85% of x402 endpoints are dead or invalid — use this to avoid paying broken or scam endpoints. Free.

check_x402_endpoint

Before paying an unknown x402 endpoint, check whether it is live and returns a valid x402 payment challenge. Returns liveness, price, network and a pay/avoid verdict. For full uptime + reputation, use PulseFeed's paid /trust API.

pulsefeed_products

List PulseFeed's paid x402 products — real-time Base on-chain intelligence for AI agents: token pulse, whale alerts, smart-money accumulation/distribution, momentum, and the x402 trust oracle — and how to pay via x402.

rank_paste

Computes the SigRank yield cascade from a paste of token counts. Parses the input, runs the full cascade math locally (no network calls), and returns: yield (Υ, the headline efficiency metric, Υ = Cache Reads × Output / Input²), snr (signal-to-noise ratio), leverage (Cr/I = cache reads divided by input), velocity (O/I = output divided by input), dev10x (10xDEV score), class (operator experience stage — 24 stages = 8 tiers × 3 sub-stages I/II/III, e.g. ARCH+ I, REFINER II, IGNITER III, or UNCLASSED for empty input), mode (detected working mode), and a deterministic prose "card" summarizing the result in plain English. Accepts two input formats: (1) JSON object {"input":N,"output":N,"cacheCreate":N,"cacheRead":N} or (2) four whitespace-separated numbers in order: input output cacheCreate cacheRead. Returns an error if the input is malformed or has negative values. Use this for a quick one-off ranking without submitting to the board. Do NOT use this to submit your score — use submit_paste instead, which both ranks and publishes. Do NOT use this if you want to rank all four time windows at once — use rank_windows for that. After calling this, use submit_paste to publish the result if you want to appear on the leaderboard.