api.polym.uk
https://api.polym.uk/UMA resolution dispute and flip base rates by category and criterion clarity; descriptive historical compatibility, not a market-specific forecast. BEFORE YOU PAY: free substitute https://dash.polym.uk/uma-base-rates.json and https://dash.polym.uk/uma-flip-rate.json. THIS ADDS: The two artifacts joined into one response, dispute axis and flip axis already aligned by category. The underlying num...
Paid verification
How it worksNo sponsored paid call yet.
Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.
Quality grade
How grading works- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
x402 readiness
Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here A, 70.1/100), which weighs availability, payability and on-chain demand. How the two differ
| Valid payment requirements | 10/10 | Payment requirements carry a payee, a mainnet network and a price. |
| Live 402 challenge | 20/25 | Endpoint reachable; its 402 challenge was seen earlier (523 ms). |
| x402 version | n/a | x402 version not observed yet. |
| Signed descriptor | n/a | No x402 standard defines a signed descriptor. |
| Uptime (30 days) | 15/15 | 32/32 probes succeeded over 30 days (100%). |
| Resource declaration | 10/10 | Declares 5 paid resource(s). |
| Verified identity | 5/10 | Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control. |
| Freshness + modern flags | 5/5 | seen in a source within 7 days; declares x402. |
| Security declaration | n/a | Payment is the access control for an x402 resource. |
Compared with peers
Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.
- Readiness
- Higher than 75% of peers
- This listing 87 · peer median 78
- Latency
- Faster than 17% of peers
- This listing 523 ms · peer median 205 ms
Where it loses the most points, and how to win them back
- Live 402 challenge −5
— Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (523 ms).
- Verified identity −5
— Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Paid endpoints
5 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.
https://api.polym.uk/market-authenticity/{conditionId}
Per-market Polymarket taker-flow concentration, price-band and book compatibility. Never a fraud verdict.
https://api.polym.uk/screener
Ranked Polymarket market-flow screener with factual concentration and liquidity-compatibility fields for the observed window.
https://api.polym.uk/resolution-risk
UMA resolution dispute and flip base rates by category and criterion clarity; descriptive historical compatibility, not a market-specific forecast.
https://api.polym.uk/resolution-watchlist
Live Polymarket watchlist ranked by structural UMA resolution base-rate signals, with flip risk kept as a separate conditional axis.
https://api.polym.uk/market-intelligence/{conditionId}
Resolution-integrity dossier for one Polymarket market: UMA exposure, proposer and disputer records, post-open context, comparables. Never a forecast.
How to call
curl -sS -i -X GET https://api.polym.uk/ # expect HTTP 402 Payment Required (about $0.05/call)Listed in
Directories this entry was found in.