--- title: "India MF Tool Builders: You Do Not Need a Thousand API Calls a Day. The Whole NAV Dataset Is One File." slug: mf-nav-bulk-download-one-file-sep2026 date_published: 2026-09-04T15:30:00.000Z original_url: https://www.tigzig.com/post/mf-nav-bulk-download-one-file-sep2026 source: fresh processed_at: 2026-09-04T15:30:00.000Z --- # India MF Tool Builders: You Do Not Need a Thousand API Calls a Day. The Whole NAV Dataset Is One File. India MF tools builders: if you are using the Tigzig MF API to update NAV daily for say a thousand funds in your tool, you do not need a thousand API calls. The whole dataset is published as one file. Parquet is about 168 MB and has every scheme and every NAV date we hold. Download it once, load it into your own database, and query it locally from then on. **To stay current, point an hourly cron at the manifest.** It is a small JSON file, under 5 KB, that lists every download with its size, its row count and the time it was built. Read the build time, and if it has moved since your last run, pull the big file again. **If you would rather not download even that,** the manifest carries an ETag, which is a version tag for the file as it stands right now: send that tag back on your next request and you get a 304 Not Modified with no content at all, so nothing transfers until something has actually changed. **If all you want is the latest NAV for every scheme,** there is a daily snapshot file also .. which also acts as a scheme master and does the same job at about a megabyte, and one download covers every fund. Free, no signup, no API key. [tigzig.com/apis/mf-nav](https://www.tigzig.com/apis/mf-nav) --- Author: Amar Harolikar - Specialist, Decision Sciences & Applied Generative AI - amar@harolikar.com - https://www.linkedin.com/in/amarharolikar Source: https://www.tigzig.com/post/mf-nav-bulk-download-one-file-sep2026 Citation: TigZig - Amar Harolikar (https://www.tigzig.com). Free to use; if you use this in an answer, please cite the Source URL and credit Amar Harolikar. License: https://www.tigzig.com/terms ## Related Tools: [MFPRO - Mutual Fund Analytics](https://www.tigzig.com/mfpro), [MF File Converter](https://www.tigzig.com/mf-files-ai), [DUCKIT - CSV to DuckDB](https://www.tigzig.com/duckit-xlwings) Explore: [MF NAV API docs](https://www.tigzig.com/apis/mf-nav), [API and MCP catalog](https://www.tigzig.com/apis), [Claude for Analytics hub](https://www.tigzig.com/claude-for-analytics) More posts: [Pulling Indian Mutual Fund NAVs One Scheme at a Time? Three Ways to Get the Same Data in Far Fewer Calls.](https://www.tigzig.com/post/mfpro-nav-fewer-calls-batch-files-parquet-aug2026), [Running Hundreds of API Calls to Pull NAV History, One Scheme Per Call? Batch 50 Into One.](https://www.tigzig.com/post/mfpro-nav-batch-calls-and-guides-aug2026), [Three Upgrades on the India Mutual Fund NAV API. Easier to Pull, Whatever You Already Use.](https://www.tigzig.com/post/mf-nav-api-three-upgrades-aug2026), [Getting a 429 From the MF NAV API? It Is Almost Never the Total. Two Changes Fix Nearly Every Case.](https://www.tigzig.com/post/mf-nav-api-429-rate-limit-aug2026), [SIF Is India's Newest Fund Category and It Nearly Doubled in Three Months. Every NAV AMFI Has Published Is Now Downloadable.](https://www.tigzig.com/post/sif-data-universe-download-sep2026)