Everything you need to know about Polyflux mempool access.
What exactly do I get? ▾
A single WebSocket URL that streams every Polymarket trade the
moment it appears in the Polygon mempool — typically 1.5s
before on-chain confirmation. You get both pending and
confirmed events, with full trade details: wallet,
counterparty, size, price, side, market role, and timestamps.
How do I connect? ▾
Open a standard WebSocket connection to the URL we email you after
payment. That's it — no SDK, no auth header, no polling. The key is
embedded in the URL path. Any language that speaks WebSocket works:
Python, Node, Rust, Go, or even a browser.
Is there a rate limit? ▾
The Regular plan allows 1 concurrent WebSocket connection. There's
no limit on the number of trades you receive — you get the full
firehose. If you need multiple connections or dedicated
infrastructure, contact us
for an Institutional plan.
How do I cancel or manage my subscription? ▾
Enter your API key below and click Manage to open
your subscription portal. From there you can cancel, update your
payment method, or view past invoices. You can also find the manage
link in your welcome email.
I lost my API key. What do I do? ▾
Email [email protected]
from the address you used at checkout. We'll verify your identity
and issue a fresh key.
What happens if my payment fails? ▾
Stripe automatically retries failed charges over a few days. During
that window your key stays active. If all retries fail, your key is
disabled until the balance is settled. No data is lost — just
reconnect once your payment goes through.