Where do I get fund data for a client reporting tool?

What a client reporting tool needs from a data source

• Per-fund performance blocks (calendar years, 1/3/5/10-year annualised, growth of 100) with the benchmark.
• Per-fund and aggregate exposures for the allocation pages.
• Costs per fund and blended, for the fee section.
• Attachable factsheets that look consistent across fund houses.
• An as-of date on everything.

Why FundFacts API fits

The report generator loops over positions: GET /funds/{isin} (cached until expiresAt) feeds the per-fund pages, POST /portfolio the aggregate pages, and POST /factsheets with format: "pdf", title and accent produces the appendix. The @fundfactsapi/widgets components render the same charts in a web report. Generate PDF factsheets from JSON and the client reporting use case walk through the layout.

What it does not do

• Valuations and transactions are yours (custodian data); the API contributes the fund descriptions and performance as published.
• Performance is the fund's, not the client's money-weighted return; compute that from the client's cash flows.

Start in ten minutes

1. Get a key at fundfactsapi.com/signup (Free plan, 15 lookups a month, no card).
2. Look up one fund and read the shape:

python
# pip install fundfacts   (or call https://fundfactsapi.com/api/v1/funds/{isin} with any HTTP client)
from fundfacts import FundFacts
​
ff = FundFacts()  # reads FUNDFACTS_API_KEY; free key at https://fundfactsapi.com/signup
fund = ff.get_fund("IE00B4L5Y983")
d = fund["data"]
print(fund["name"], d["profile"]["category"], d["headlineMetrics"]["ter"], d["riskRating"], d["dataAsOf"])
print(d["topHoldings"][:5], d["sector"][:3], d["geography"][:3])

1. Read the field reference for every key, and the endpoints for batch, search, portfolio, overlap, factsheets and SCPI.
2. If a coding agent is building it, point it at /llms-full.txt, the complete AGENTS.md for the API.

What it costs

A firm reporting quarterly on 400 distinct funds spends about 400 requests for the data plus two per PDF factsheet; a few thousand requests a quarter, well inside Pro ($49). One request is counted per ISIN answered; search is free. Plans are on the pricing page.

Alternatives worth knowing

• Portfolio-management systems with built-in reporting when you already run one; they usually accept the API's data through their import.
• Vendor factsheet services when you need a specific regulatory template rather than a clean one-pager.

The provider comparison and the compare pages go into each in more depth.