●

Polymarket Prediction Markets Feed

Returns active Polymarket prediction markets with prices, volume and liquidity, sourced from the public Polymarket Gamma API. Plain JSON, no API key required. The first 3 calls per wallet are free via the X-WALLET header.

Pay from $0.001 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

UPTIME 24H 77.6% │ 7D 80.6% │ 30D 80.6%

BASE URL https://polymarket-markets.hergertsynthora.com │ ENDPOINTS 1 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-07-20 │ MONITORED SINCE 2026-07-20

ASSESSMENT

updated 4h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 86%

uptime 24h: 83.3%
uptime 7d: 86%
uptime 30d: 86%
uptime 90d: 86%
response p95: 5651ms
avg response: 1828ms
total checks: 47

compliance A (11/11)

11 of 11 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 (p15 in Data)

price (min): $0.001
category percentile (min): p15 in Data
endpoints / prices: 1 / 1
model: flat
stability: 100%

risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

traction $0.03 30d · 0 buyers

volume 30d: $0.03
buyers 30d: 0
settlements 30d: 3
last settlement: 2026-07-21
top buyer share: 48% of 30d volume
trend 7d vs 30d: 0.12x the 30d daily rate
networks: eip155:8453

Attributed pro-quota: this payout address is shared, so volume and buyers are the operator-level figure divided by the services sharing it. A declared convention, not an individually observed measure, and still a conservative undercount.

Top buyer share is a concentration signal, not part of the ranking score.

WHAT IT DOES

ai-derived

Provides live prediction-market data from Polymarket including active markets, prices, volume and liquidity via the public Gamma API.

category: prediction-markets
in: body
auth: none

prediction-marketsmarket-datagamma-apipolymarket

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	DESCRIPTION	PRICE	NETWORK	ASSET
POST	/service	Live prediction-market data from Polymarket: active markets, prices, volume and liquidity via the public Gamma API. Deterministic JSON, no key. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.	$0.001	Base	USDC

1 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /service returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i -X POST 'https://polymarket-markets.hergertsynthora.com/service'

// 402 response (captured by monitor) · 1 payload · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x10800a5a5B9d72251566EC651E862A8b4B427dE0",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "mimeType": "application/json",
        "resource": "https://polymarket-markets.hergertsynthora.com/service",
        "description": "Live prediction-market data from Polymarket: active markets, prices, volume and liquidity via the public Gamma API. Deterministic JSON, no key. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.",
        "maxAmountRequired": "1000",
        "maxTimeoutSeconds": 300
      }
    ],
    "freeTier": {
      "note": "send header X-WALLET: 0x<your Base address> for a free trial",
      "header": "X-WALLET",
      "callsPerWallet": 3
    },
    "resource": {
      "url": "https://polymarket-markets.hergertsynthora.com/service",
      "mimeType": "application/json",
      "description": "Live prediction-market data from Polymarket: active markets, prices, volume and liquidity via the public Gamma API. Deterministic JSON, no key. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "limit": 5,
              "active": true
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "niche": "polymarket-markets",
              "result": {}
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "limit",
                    "active"
                  ],
                  "properties": {
                    "limit": {
                      "type": "integer",
                      "description": "limit"
                    },
                    "active": {
                      "type": "boolean",
                      "description": "active"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "ok": {
                    "type": "boolean"
                  },
                  "type": "object",
                  "niche": {
                    "type": "string"
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

UPTIME

RESPONSE TIME

24h UPTIME 77.6%

UPTIME 24H 77.6%

AVG RESP 1795ms

TOTAL CHECKS 63

RECENT CHECKS

TIME STATUS RESP

13:09:03 UTC ● OK 1295ms

12:53:03 UTC ● OK 943ms

12:37:05 UTC ● OK 1128ms

12:21:10 UTC ● SLOW 3169ms

12:05:06 UTC ● OK 2641ms

11:49:04 UTC ● OK 1096ms

11:33:14 UTC ○ DOWN 10001ms

11:17:07 UTC ● OK 2126ms

11:01:15 UTC ○ DOWN 10001ms

10:45:09 UTC ● OK 1682ms

10:29:07 UTC ● OK 1032ms

10:13:08 UTC ● OK 1582ms

09:57:09 UTC ● OK 2284ms

09:41:08 UTC ● OK 1435ms

09:25:14 UTC ○ DOWN 10001ms

09:09:08 UTC ● OK 1666ms

08:53:05 UTC ○ DOWN 599ms

08:37:19 UTC ○ DOWN 10001ms

OVER TIME

All charts share the 24h window selected here. Every series is also served as JSON at /api/v1/services/polymarket-prediction-markets-feed/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted).

PRICE (captured 402, USD)

SUB-SCORES (uptime + x402 compliance)

VOLUME (on-chain settlement, USD)

Shared payout address (61 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service figure is attributed, the assessment block and the ranking, it is the address total divided pro-quota by the 62 services sharing it: a declared convention, not an individually observed measure.

DISTINCT BUYERS

Shared payout address (61 other services). These bars are the full shared address (operator-level), so do not sum them across the services that share it. Where a per-service buyer count is attributed, the assessment block and the ranking, it is divided pro-quota by the 62 services sharing the address and can be fractional: a declared convention, not an individually observed measure.

COMPLIANCE

11/11 checks pass · grade A

402 payload captured
accepts[] array present
payTo address recoverable
payTo at accepts[0].payTo (conformant shape)
payTo is a valid on-chain address
atomic price declared
atomic price in a sane range
asset (token) address declared
network resolves to CAIP-2
payment scheme declared
served over HTTPS

EMBED THIS BADGE

Show that Polymarket Prediction Markets Feed is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

Polymarket Prediction Markets Feed uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/polymarket-prediction-markets-feed?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/polymarket-prediction-markets-feed.svg" alt="Polymarket Prediction Markets Feed listed on x402-list" height="28">
</a>

// Markdown

[![Polymarket Prediction Markets Feed on x402-list](https://x402-list.com/badge/polymarket-prediction-markets-feed.svg)](https://x402-list.com/services/polymarket-prediction-markets-feed?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/polymarket-prediction-markets-feed?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/polymarket-prediction-markets-feed.svg?data=uptime" alt="Polymarket Prediction Markets Feed uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]