{"uid":"cap_Xojp7NO17psyapjrN-vPn","slug":"changelog-state-api-change-history-for-x402-vendor-ee896f03","name":"Changelog State API – Change History for x402 Vendor","description":"Detected changelog update history for one tracked vendor.","url":"https://changelog-state-api.replit.app/api/monitors/x402/changes?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object","required":["slug"],"properties":{"slug":{"type":"string","example":"openai","pattern":"^[a-z0-9][a-z0-9-]*$","maxLength":64,"minLength":1,"description":"Vendor slug, lowercase alphanumeric with dashes. Take one from GET /api/monitors and substitute it into the path: `{slug}` is a placeholder that names no vendor and never returns data. Worked example: GET /api/monitors/openai."}}},"queryParams":{"type":"object","properties":{"type":{"enum":["new_release","version_changed","date_changed","title_changed","breaking_signal"],"type":"string","description":"Restrict to a single change type."},"limit":{"type":"integer","default":50,"maximum":200,"minimum":1,"description":"Maximum number of change rows to return."},"since":{"type":"string","format":"date-time","description":"Only return changes detected at or after this instant."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"enum":["json"],"type":"string"},"example":{"type":"object"}},"description":"Detected changelog update history (paid)"}},"description":"Call shape for GET /api/monitors/{slug}/changes."},"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_y-UXMEPbou8uGOMxZOUV3","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":"Returns detected changelog update history (new releases, version changes, date/title changes, breaking signals) for the tracked vendor 'x402'.","exampleAgentPrompt":"Show me the detected changelog change history for x402 — include new releases and breaking signals from the last 30 days, up to 100 results.","exampleUseCases":[{"title":"Breaking change alert for x402","prompt":"Have there been any breaking_signal change events detected for x402 in the past two weeks? Show me up to 50 results."},{"title":"Tracking x402 release cadence","prompt":"Pull the changelog history for x402 and list only new_release events so I can see how often they ship updates — give me the last 100 entries."},{"title":"Audit x402 changelog since a specific date","prompt":"What changelog changes were detected for x402 on or after January 1, 2025? I want version changes and title changes especially."}],"resultDescription":"A JSON array of changelog change records for the x402 vendor, each including the change type (e.g. new_release, version_changed, breaking_signal), detection timestamp, and relevant metadata such as version strings, titles, or dates. Supports filtering by change type and time window.","failureModes":["Invalid or unrecognized vendor slug returns empty results or 404","'since' timestamp in wrong format causes validation error","limit out of range (below 1 or above 200) causes 400 error","No changes found in specified window returns empty array","Service unavailability returns 5xx error"],"whenToPreferThis":"Use this endpoint when you need the historical log of all detected changes for the x402 vendor specifically, including fine-grained change types like breaking signals, version changes, and title changes. Prefer this over the 'recent releases' sibling endpoint when you need the raw change event stream rather than structured release summaries, or when you need to filter by change type or time window.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T18:39:36.591Z","isFirstParty":false,"canonicalSlug":"changelog-state-api-change-history-for-x402-vendor-ee896f03"}