{"uid":"cap_5XEdbMmdycYhXL3RBLz7o","slug":"answerpool-13f-changes-ee0a66b2","name":"AnswerPool 13F Changes","description":"AnswerPool turns SEC EDGAR, the Federal Register, USAspending, NIH, BLS and OpenAlex into structured JSON answers that AI agents and developers fetch in one call. 69 endpoints free, no account; derived analyses $0.02–$0.05 per call by card credits or USDC (x402). MCP server, full provenance.","url":"https://answerpool.io/v1/sec/13f/changes","method":"GET","headers":{},"bodySchema":{"type":"object","$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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","title":"ChangesIn","required":["cik"],"properties":{"cik":{"type":"string","title":"Cik","pattern":"^\\d{1,10}$","maxLength":10,"description":"CIK of the 13F filer (institutional manager), 1-10 digits, zero padding optional (e.g. 1067983 for Berkshire Hathaway). Needs a 13F-HR in both of the two most recently indexed quarters; find a manager with /v1/sec/13f/managers."},"limit":{"type":"integer","title":"Limit","default":50,"maximum":200,"minimum":1,"description":"Maximum position changes returned, ordered by the larger of the current and prior reported position value, descending. Default 50."}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"cik":"0001566307","as_of":"2026-08-31T17:00:00Z","count":1,"period":"2025-12-31","changes":[{"cusip":"67066G104","change":"new","issuer":"NVIDIA CORP","shares":4000,"value_usd":500000,"prev_shares":null,"prev_value_usd":null}],"prev_period":"2025-09-30","manager_name":"Ramiah Investment Group","periods_held":["2025-12-31","2025-09-30"]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7ggZhP1vbl-7xUqO8d-Jw","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns quarter-over-quarter 13F portfolio changes for a given SEC filer — new, exited, increased, and decreased positions with share counts and USD values for both periods.","exampleAgentPrompt":"Pull the quarter-over-quarter 13F portfolio changes for manager CIK 0001566307 — show me all new, exited, increased, and decreased positions with share counts and USD values for both this quarter and last.","exampleUseCases":[{"title":"Track hedge fund's new stock bets","prompt":"Show me every new position that CIK 0001067983 (Berkshire Hathaway) opened in their most recent 13F quarter — include share counts and USD values."},{"title":"Monitor a fund's full exits last quarter","prompt":"Which stocks did the fund with CIK 0001657201 completely exit in their latest quarterly 13F filing? Give me the previous value and share count for each."},{"title":"Identify largest position increases","prompt":"For manager CIK 0001566307, pull up to 200 of their 13F position changes from last quarter and show me which holdings they increased the most in dollar value."}],"resultDescription":"A JSON object containing the manager's CIK, name, current and prior reporting periods, total count of changes, and an array of change rows each with issuer name, CUSIP, change type (new/exited/increased/decreased), current and prior share counts, and current and prior USD values.","failureModes":["Invalid or non-existent CIK returns an error or empty result","CIK with no 13F filing history returns empty changes array","Manager has only one period on record — no prior period available for comparison","Limit parameter out of range (less than 1 or greater than 200) returns validation error","Filing lag means most recent quarter data may not yet be available shortly after quarter end"],"whenToPreferThis":"Choose this endpoint when you need a pre-computed, structured diff of a manager's 13F holdings across two consecutive quarters in a single API call — saving the effort of fetching and comparing two raw 13F filings yourself. It is especially valuable when you want classified change types (new/exited/increased/decreased) alongside dual-period values and shares, which competitors typically offer only as a premium derived layer.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:41:21.452Z","isFirstParty":false}