Banking Access Index
Finance
Which US business banking providers accept founders by country of residence, with sources
No keyCORSHTTPS
EstimateTax
A REST API designed for calculating US federal, state, and local income taxes for the year 2026. It provides deterministic responses with source attribution, requires no API key, and allows up to 60 requests per minute from a single address.
Verified 4 days ago: 100% uptime
API key
Not required
HTTPS
Supported
Browser calls
Yes, CORS enabled
Status
Live · 95/100
What our checks found
- Health score
- 95/100
- Reliability
- 100%
- Average latency
- 1482ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for EstimateTax. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "https://estimatetax.net/ENDPOINT" \
-H "Accept: application/json"Where this listing comes from
Aggregated from 2 public sources (freepublicapis, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
Other Finance APIs
See all 119 →Binlist
Finance
Public access to a database of IIN/BIN information
No keyCORSHTTPS
Econdb
Finance
Global macroeconomic data
No keyCORSHTTPS
FilingFirehose
Finance
Structured SEC EDGAR filings with body-text-classified 8-Ks, activist-tagged 13D/G, and ATM-offering detection in S-3 / 424B5
No keyCORSHTTPS
Futures Clock
Finance
Trading hours and session windows for 65 futures products on 16 global exchanges
No keyCORSHTTPS
Goldprice.dev
Finance
Cross-validated gold, silver & copper spot, futures & 30-year history in 13 currencies
No keyCORSHTTPS
EstimateTax — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is EstimateTax free to use?
EstimateTax is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.
Does EstimateTax need an API key?
No. We called EstimateTax on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.
Can I call EstimateTax from browser JavaScript?
Yes. EstimateTax returned CORS headers when we checked it, so a browser will let your page read the response. You can fetch it directly from client-side JavaScript with no proxy and no backend.
Is EstimateTax still working?
Yes, as of 2026-09-18. Our automated check reached EstimateTax and recorded a 100% reliability score with a median response time of 1482 ms. We re-check on a schedule, and this page updates with the result.
Is EstimateTax available over HTTPS?
Yes. EstimateTax serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.