Banking Access Index
Finance
Which US business banking providers accept founders by country of residence, with sources
No keyCORSHTTPS
PolyKal Fees
Kalshi & Polymarket trading fee rates and formulas as verified JSON
Verified today: 100% uptime
API key
Not required
HTTPS
Supported
Browser calls
No, needs a proxy
Status
Live · 100/100
What our checks found
- Health score
- 100/100
- Reliability
- 100%
- Average latency
- 845ms
Last checked 2026-09-27. Measured independently, not self-reported by the provider.
How to call it
A starting template for PolyKal Fees. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "https://polymarket-kalshi.com/ENDPOINT" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
Where this listing comes from
Aggregated from one public source (public-apis), then normalised and checked by us.
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PolyKal Fees — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is PolyKal Fees free to use?
PolyKal Fees 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 PolyKal Fees need an API key?
No. We called PolyKal Fees on 2026-09-27 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 PolyKal Fees from browser JavaScript?
Not directly. PolyKal Fees did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is PolyKal Fees still working?
Yes, as of 2026-09-27. Our automated check reached PolyKal Fees and recorded a 100% reliability score with a median response time of 845 ms. We re-check on a schedule, and this page updates with the result.
Is PolyKal Fees available over HTTPS?
Yes. PolyKal Fees serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.