{"uid":"cap_hEDtAyXXOrc1ALWI84tNC","slug":"changelog-state-api-vendor-change-history-aae66a6c","name":"Changelog State API – Vendor Change History","description":"Detected changelog update history for one tracked vendor.","url":"https://changelog-state-api.replit.app/api/monitors/geth/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_BBiRXlSF5PTvFAzwpN8C9","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 the detected changelog update history (new releases, version changes, date/title changes, breaking signals) for a single tracked vendor identified by slug.","exampleAgentPrompt":"Show me the last 20 changelog changes detected for geth, filtering to only breaking_signal events, since January 1 2025.","exampleUseCases":[{"title":"Breaking change alert for smart contract team","prompt":"Pull all breaking_signal changelog events detected for geth since March 1 2025 — I need to know if anything in their releases could affect our smart contract integrations."},{"title":"Release cadence audit for a vendor","prompt":"Fetch up to 100 new_release change events for the openai vendor from the changelog tracker so I can analyze how frequently they've been shipping lately."},{"title":"Changelog drift detection for DevOps monitoring","prompt":"Get the full detected change history for the hardhat vendor — all change types, up to 200 rows — so I can check if any version or date fields have been silently updated without a new release announcement."}],"resultDescription":"A JSON object containing an array of detected changelog change events for the specified vendor. Each event includes the change type (e.g. new_release, version_changed, date_changed, title_changed, breaking_signal), the detection timestamp, and relevant metadata about what changed in the vendor's changelog.","failureModes":["Invalid or unknown vendor slug returns no data or an empty result set","Using the literal placeholder '{slug}' instead of a real vendor slug yields no results","Requesting a slug not in the monitored vendor list returns empty or 404","Invalid date-time format for 'since' parameter causes a validation error","Exceeding the 200-row limit returns a validation error","Payment failure (x402) blocks access to the paid response"],"whenToPreferThis":"Use this endpoint when you need the raw history of detected changelog mutations for a specific vendor — including subtle changes like date edits, title rewrites, or breaking signal flags — rather than just structured release summaries. Prefer this over the releases endpoint when you want to audit changelog drift, detect silent edits, or filter by specific change event types.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T06:36:35.307Z","isFirstParty":false,"canonicalSlug":"changelog-state-api-vendor-change-history-f05f9da6"}