{"uid":"cap_jzB1EacE3TAigOY6dG2pc","slug":"x402-bazaar-rank-change-detection-services-9e260b4b","name":"x402 Bazaar Rank – Change Detection Services","description":"An open index of the machine-to-machine (agent) economy. x402 routes: ranked discovery over the live x402 service market, every indexed service scored by real 30-day calls and paying-wallet bounds, with a receipt naming the snapshot hash and scoring revision. /economy routes, for Tempo MPP, Virtuals ACP, Olas, Masumi, ERC-8004 agent registries, Solana agent registries, Base agent contracts and MCP servers (Official MCP Registry): each protocol's published figures (agent or server counts, transactions or payment events; payers and USD volume only where the source publishes them: payers for x402 and Tempo MPP, USD volume for x402 and Virtuals ACP), each with its unit, window and source; units differ, so totals are not summed. L402 and per-service MPP listings are not covered.","url":"https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-change-detection?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"count":25,"query":{"by":"payers","op":"top","limit":25,"where":{"tag":"change-detection"}},"route":"/in-change-detection","matched":359,"services":[{"name":"forecast api","network":"eip155:8453","calls30d":310,"priceUsd":0.01,"resource":"https://api.example.com/forecast","payers30d":42}],"declaredBy":"agent","generatedAt":"2026-09-17T12:00:00.000Z"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.008","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":"$0.008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-fu9FwPHq0AybZVJ3MHCt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a ranked list of x402 services tagged 'change-detection', ordered by real 30-day call volume and unique paying wallets, with a signed snapshot receipt.","exampleAgentPrompt":"Show me the top change-detection services on the x402 market right now, ranked by how many unique paying wallets used them in the last 30 days.","exampleUseCases":[{"title":"Evaluating change-detection API vendors","prompt":"Which change-detection APIs on x402 have the most real usage — show me the top ones ranked by unique paying wallets over the last 30 days so I can pick a reliable one."},{"title":"Monitoring market activity in change-detection niche","prompt":"Pull the current x402 Bazaar ranking for change-detection services and tell me how many are indexed and what the top 5 look like by call volume."},{"title":"Benchmarking a new service against competitors","prompt":"I just launched a change-detection API on x402 — can you fetch the ranked list of change-detection services so I can see where I stand against the competition?"}],"resultDescription":"A JSON object containing the total count of matched services, the query parameters used (ranking operation, limit, tag filter), the route, a list of ranked services each with name, network, 30-day call count, price in USD, resource URL, and unique payers; plus metadata fields indicating who declared the index, the snapshot generation timestamp, and a receipt with snapshot hash and scoring revision.","failureModes":["No services indexed under 'change-detection' tag — returns empty services array with count 0","Payment not completed — 402 response requiring x402 payment header","Worker timeout if index is large — partial or error response","Stale snapshot if index hasn't refreshed — generatedAt timestamp may be hours old","Invalid or malformed request properties — may return 400 or empty result"],"whenToPreferThis":"Use this endpoint when you need a curated, usage-verified ranked list of change-detection services specifically from the x402 pay-per-call ecosystem, backed by real on-chain payment data from the last 30 days. Prefer this over generic API directories when you want services that have demonstrated actual paying adoption on Base/EVM networks and need a signed snapshot receipt for auditability.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T12:36:03.372Z","isFirstParty":false,"canonicalSlug":"x402-bazaar-rank-change-detection-services-9e260b4b"}