{"uid":"cap_f0ocesXPx2id8gRoEs5A5","slug":"changelog-state-api-langchain-recent-releases-9000ee3e","name":"Changelog State API – LangChain Recent Releases","description":"Structured recent releases for one tracked vendor.","url":"https://changelog-state-api.replit.app/api/monitors/langchain","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, and requesting those literal characters returns 404. Worked example: GET /api/monitors/openai."}}},"queryParams":{"type":"object","properties":{"limit":{"type":"integer","default":5,"maximum":50,"minimum":1,"description":"Maximum number of release entries to return on this page. The page size, not a total: use `cursor` to walk past it."},"cursor":{"type":"string","default":"","maxLength":512,"description":"Opaque next-page token, copied verbatim from `nextCursor` on the previous response for this same vendor. Omit it — or send the empty string — to start at the newest entry. It names a position in the newest-first order rather than an offset, so a page you have already read never shifts under you: an entry that arrives mid-walk takes the place its own publish date gives it — above the cursor, on ground you have already covered, or below it, still ahead of you — instead of renumbering every page behind it. It does not expire; a walk can be paused and resumed. Do not construct or edit one: a token that is malformed, or was issued for a different vendor, is refused with 400 and is never charged."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"enum":["json"],"type":"string"},"example":{"type":"object"}},"description":"Full structured recent releases (paid)"}},"description":"Call shape for GET /api/monitors/{slug}."},"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_o8OzI7BNecEi8p8XncgMw","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 structured recent release entries for the LangChain vendor, up to a configurable limit.","exampleAgentPrompt":"Pull the latest 10 LangChain releases from the Changelog State API and show me what changed recently.","exampleUseCases":[{"title":"LangChain version upgrade check","prompt":"Check the Changelog State API for the most recent LangChain releases — I want to know if there's been a new version since last week and what changed."},{"title":"AI dependency update monitoring","prompt":"Fetch the last 5 LangChain releases from the changelog tracker so I can decide whether to update my project's dependency."},{"title":"Automated release digest generation","prompt":"Get up to 20 recent LangChain release entries from the Changelog State API so I can compile a weekly update digest for my team."}],"resultDescription":"A JSON object containing a list of structured recent release entries for LangChain, each including release version, date, and changelog details, up to the requested limit (default 10, max 50).","failureModes":["Vendor slug not found – returns 404 if the slug does not match a tracked vendor","Limit out of range – returns validation error if limit is below 1 or above 50","Service unavailable – Replit-hosted service may have cold start delays or downtime","Payment failure – x402 micropayment of $0.01 USDC required per call; failure returns 402","No releases available – may return empty list if no releases have been detected yet"],"whenToPreferThis":"Use this endpoint when you need structured, machine-readable recent release data specifically for LangChain, rather than scraping changelogs manually. Prefer it over generic web search when you want consistently formatted release records you can compare, version-check, or feed into downstream workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:37:59.272Z","isFirstParty":false}