{"uid":"cap_nhzd__UMZ7oR3qfUuXwiR","slug":"stack-facts-llm-model-price-change-watch-feed-4e80e521","name":"Stack Facts: LLM Model Price & Change Watch Feed","description":"Check a package before install: malware, known vulnerabilities (OSV), exploited CVEs (CISA KEV) and end-of-life, plus LLM prices; signed answers, pay per call in USDC, no account or API key.","url":"https://g5joilnmeep4ntz3nwezxt5dmu.srv.us/v1/models/watch?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"since":{"type":"string","maxLength":64},"models":{"type":"array","items":{"type":"string","maxLength":200},"maxItems":50,"minItems":1},"warn_days":{"type":"integer","maximum":365,"minimum":0}}},"responseSchema":{"type":"json","example":{"data":{"to":"models-20261009T060000Z-f99d55c9","next":"POST /v1/models/watch with \"sin…","note":"Fields are the live values; cha…","since":"models-20261009T050000Z-044bcb8b","counts":{"added":0,"removed":1,"unknown":0,"alerting":3,"modified":2},"matched":3,"results":[{"id":"openai/gpt-4o","model":{},"alerts":["modified"],"change":"modified","requested":"openai/gpt-4o","changed_in":[{}]}],"unknown":[],"warn_days":90,"snapshots_merged":1},"meta":{"as_of":"2026-10-09T06:00:00Z","stale":false,"key_id":"sf-test-1","notice":"Normalised (modified) from the …","sha256":"f99d55c9aa420561de698d63d70d916…","source":"https://raw.githubusercontent.c…","dataset":"models","licence":"MIT","signature":"mhC9-Y6gzfCx8r9mtDum1G5J2dhSKV5…","attribution":"Pricing data derived from LiteL…","snapshot_id":"models-20261009T060000Z-f99d55c9","manifest_url":"/v1/models/manifest","retrieved_at":"2026-10-09T06:00:00.000Z"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.012","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":"$0.012/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.012","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.012","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_c2mQ_yI86OTNzLoZY210f","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.012","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Monitors a list of LLM models for pricing changes, additions, and removals, returning signed diffs with alert summaries since a given snapshot cursor.","exampleAgentPrompt":"Watch these models for any pricing changes or removals since my last check — openai/gpt-4o, anthropic/claude-3-5-sonnet, and google/gemini-pro — and alert me if anything changed in the last 90 days.","exampleUseCases":[{"title":"Detect surprise LLM price hike","prompt":"Check openai/gpt-4o and anthropic/claude-3-opus for any pricing changes since my last snapshot token 'models-20261009T050000Z-044bcb8b' and tell me if costs went up."},{"title":"Alert on deprecated model removal","prompt":"Watch mistral/mistral-7b and openai/gpt-4-turbo for me — let me know if either has been removed from the catalog or marked as end-of-life in the last 30 days."},{"title":"Automated cost-monitoring pipeline","prompt":"Poll the model watch feed for openai/gpt-4o, google/gemini-1.5-pro, and meta/llama-3-70b with a 60-day warning window and give me a summary of everything that's changed since the last cursor."}],"resultDescription":"Returns a signed JSON payload containing: a 'since' and 'to' snapshot cursor pair for polling continuity, counts of added/removed/modified/alerting models, per-model change details (what changed and in which fields), a SHA-256 signature for integrity verification, dataset attribution and licence info, and a 'next' instruction for the following poll call. The 'meta' block includes the snapshot timestamp, staleness flag, key ID, and manifest URL.","failureModes":["Invalid or expired 'since' cursor returns an error or resets to latest snapshot","Unknown model IDs are returned in the 'unknown' array rather than causing a failure","Exceeding 50 models in the request array triggers a validation error","Payment not included or insufficient USDC causes a 402 response before any data is returned","Stale data flagged in meta.stale field if upstream source is delayed"],"whenToPreferThis":"Choose this endpoint when you need cryptographically signed, verifiable LLM pricing change data on a polling basis without managing an account or API key — particularly when you want cursor-based diffing (only what changed since last check) rather than a full catalog dump. Prefer it over scraping LiteLLM or provider docs directly when you need auditability (signature + SHA-256) and pay-per-call economics with no subscription commitment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T06:35:51.565Z","isFirstParty":false,"canonicalSlug":"stack-facts-llm-model-price-change-watch-feed-4e80e521"}