x402 List

x402 Protocol Service Directory

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Polymarket Signal Detector

Finance PAYMENT-READY

payment-ready until 2026-10-02

Polymarket wallet-reputation and insider-signal data, gated by x402: per-wallet reputation lookup, per-market wallet-flow by persona, a free-to-verify signal track record, resolved-signal drill-down, feedback channel, and push-notification signal subscriptions (day/week/month).

Pay from $0.01 to $33.00 in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-05 (start of our harvest window) · $2.15 all-time · last settled 2026-08-08

BASE URL https://x402.sashco.ca │ WEBSITE https://x402.sashco.ca │ ENDPOINTS 8 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-11 │ MONITORED SINCE 2026-08-11

VERDICT

ranking generation 3

solid 79/100 #67 of 92 in Finance by measured score

What the score read on this service: status degraded, 99.3% uptime 30d, 531ms response p95, x402 compliance 13 of 13, $0.01 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside Finance, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 92 listings, this one among them. That set is wider than the 92 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN FINANCE

Other Finance services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE BAND SCORE UPTIME 30D VOL 30D
Bitrefill strong 95 99.9% $583.05
Losbeto — LLM Gateway & Market Intelligence solid 91 99.4% $90.02
Stock Trends Market Intelligence solid 91 99.4% $101.28
x402stock solid 90 100% $21.29
hlrisk solid 90 99.8% $16.39
5 of 91 other ranked services in Finance · see the whole category

ASSESSMENT

updated 39m ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 99.3%
uptime 24h
100%
uptime 7d
99.7%
uptime 30d
99.3%
uptime 90d
98.7%
response p95
531ms
avg response
376ms
total checks
2,634

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (13/13)

13 of 13 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.01 to $33.00 (p47 in Finance)
price (min)
$0.01
price (max)
$33.00
category percentile (min)
p47 in Finance
category percentile (max)
p93 in Finance
endpoints / prices
8 / 6
model
tiered
stability
0%
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.

domain age
2165d
registrar
Go Daddy Domains Canada, Inc
hosting
custom
domain created
2020-10-19

Identity facts, not a risk score.

traction $0.00 30d · 0 buyers
volume 30d
$0.00
buyers 30d
0
settlements 30d
0
measured since
2026-08-05 (start of our harvest window)
last settlement
2026-08-08
top buyer share
-
trend 7d vs 30d
-
networks
eip155:8453
volume all-time
$2.15
settlements all-time
6
median settlement 30d
-
max settlement 30d
-
settled via
-

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

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

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
POST /feedback $0.01 Base USDC header
GET /markets/0x3733a1b647e7364095736ab0966465d896a84cf3b6bc1695ca1f26c3239b3868/wallet-flow $0.10 Base USDC header
GET /signals/resolved $0.01 Base USDC -
POST /signals/subscribe/day $2.00 Base USDC header
POST /signals/subscribe/month $33.00 Base USDC header
POST /signals/subscribe/week $10.00 Base USDC header
GET /track-record $0.01 Base USDC -
GET /wallets/0x0000000000000000000000000000000000dEaD $0.02 Base USDC header
8 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /markets/0x3733a1b647e7364095736ab0966465d896a84cf3b6bc1695ca1f26c3239b3868/wallet-flow returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://x402.sashco.ca/markets/0x3733a1b647e7364095736ab0966465d896a84cf3b6bc1695ca1f26c3239b3868/wallet-flow'
// 402 response (captured by monitor) · 6 payloads · click to expand 
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xBE6dc051DE3A985399b066685a50430303e38405",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402.sashco.ca/wallets/0x0000000000000000000000000000000000dEaD",
      "tags": [
        "prediction-markets",
        "polymarket",
        "wallet-reputation"
      ],
      "mimeType": "application/json",
      "description": "Wallet reputation summary: trade/volume stats, persona tags, realized PnL, open position count, and conviction/concentration scores. Does not include per-trade history.",
      "serviceName": "Polymarket Signal Detector"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "var1": "0x0000000000000000000000000000000000dEaD"
            }
          },
          "output": {
            "type": "object",
            "format": "json"
          }
        },
        "schema": {
          "type": "object",
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          },
          "description": "Wallet reputation summary: trade/volume stats, persona tags, realized PnL, open position count, and conviction/concentration scores. Does not include per-trade history."
        },
        "routeTemplate": "/wallets/:var1"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xBE6dc051DE3A985399b066685a50430303e38405",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402.sashco.ca/markets/0x3733a1b647e7364095736ab0966465d896a84cf3b6bc1695ca1f26c3239b3868/wallet-flow",
      "tags": [
        "prediction-markets",
        "polymarket",
        "wallet-reputation"
      ],
      "mimeType": "application/json",
      "description": "Per-market trade volume/count broken out by persona and side, as of ~24 hours ago.",
      "serviceName": "Polymarket Signal Detector"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "var1": "0x3733a1b647e7364095736ab0966465d896a84cf3b6bc1695ca1f26c3239b3868"
            }
          },
          "output": {
            "type": "object",
            "format": "json"
          }
        },
        "schema": {
          "type": "object",
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          },
          "description": "Per-market trade volume/count broken out by persona and side, as of ~24 hours ago."
        },
        "routeTemplate": "/markets/:var1/wallet-flow"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xBE6dc051DE3A985399b066685a50430303e38405",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402.sashco.ca/feedback",
      "tags": [
        "prediction-markets",
        "polymarket",
        "wallet-reputation"
      ],
      "mimeType": "application/json",
      "description": "Submit bug/like/dislike/feature feedback, attributed to the paying wallet.",
      "serviceName": "Polymarket Signal Detector"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "text": "...",
              "category": "bug"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "object",
            "format": "json"
          }
        },
        "schema": {
          "type": "object",
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          },
          "description": "Submit bug/like/dislike/feature feedback, attributed to the paying wallet."
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xBE6dc051DE3A985399b066685a50430303e38405",
        "amount": "2000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402.sashco.ca/signals/subscribe/day",
      "tags": [
        "prediction-markets",
        "polymarket",
        "wallet-reputation"
      ],
      "mimeType": "application/json",
      "description": "24-hour push-notification pass: every fired signal matching your persona/market filters is POSTed to your callback_url as it happens. callback_url is required at subscribe time. Sports-category markets are excluded upstream of every persona and can't be re-enabled via ignored_categories. See GET /track-record's implied_daily_value_usd for the checkable math behind this price.",
      "serviceName": "Polymarket Signal Detector"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "personas": [
                "smart_money"
              ],
              "callback_url": "https://agent.example.com/webhook",
              "min_stake_usd": null,
              "ignored_categories": [],
              "ignored_condition_ids": []
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "object",
            "format": "json"
          }
        },
        "schema": {
          "type": "object",
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          },
          "description": "24-hour push-notification pass: every fired signal matching your persona/market filters is POSTed to your callback_url as it happens. callback_url is required at subscribe time. Sports-category markets are excluded upstream of every persona and can't be re-enabled via ignored_categories. See GET /track-record's implied_daily_value_usd for the checkable math behind this price."
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xBE6dc051DE3A985399b066685a50430303e38405",
        "amount": "10000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402.sashco.ca/signals/subscribe/week",
      "tags": [
        "prediction-markets",
        "polymarket",
        "wallet-reputation"
      ],
      "mimeType": "application/json",
      "description": "7-day push-notification pass -- same delivery as the 24-hour tier, priced at a bulk discount (5x the day price, not 7x). callback_url is required at subscribe time. Sports-category markets are excluded upstream of every persona and can't be re-enabled via ignored_categories.",
      "serviceName": "Polymarket Signal Detector"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "personas": [
                "smart_money"
              ],
              "callback_url": "https://agent.example.com/webhook",
              "min_stake_usd": null,
              "ignored_categories": [],
              "ignored_condition_ids": []
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "object",
            "format": "json"
          }
        },
        "schema": {
          "type": "object",
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          },
          "description": "7-day push-notification pass -- same delivery as the 24-hour tier, priced at a bulk discount (5x the day price, not 7x). callback_url is required at subscribe time. Sports-category markets are excluded upstream of every persona and can't be re-enabled via ignored_categories."
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xBE6dc051DE3A985399b066685a50430303e38405",
        "amount": "33000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402.sashco.ca/signals/subscribe/month",
      "tags": [
        "prediction-markets",
        "polymarket",
        "wallet-reputation"
      ],
      "mimeType": "application/json",
      "description": "30-day push-notification pass -- same delivery as the 24-hour tier, priced at a bulk discount (~16.7x the day price, not 30x). callback_url is required at subscribe time. Sports-category markets are excluded upstream of every persona and can't be re-enabled via ignored_categories.",
      "serviceName": "Polymarket Signal Detector"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "personas": [
                "smart_money"
              ],
              "callback_url": "https://agent.example.com/webhook",
              "min_stake_usd": null,
              "ignored_categories": [],
              "ignored_condition_ids": []
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "object",
            "format": "json"
          }
        },
        "schema": {
          "type": "object",
          "properties": {
            "input": {
              "required": [
                "method"
              ]
            }
          },
          "description": "30-day push-notification pass -- same delivery as the 24-hour tier, priced at a bulk discount (~16.7x the day price, not 30x). callback_url is required at subscribe time. Sports-category markets are excluded upstream of every persona and can't be re-enabled via ignored_categories."
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 24h selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/polymarket-signal-detector/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). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME
09-25 · uptime 100.0% · 383ms avg09-2509-25
24h UPTIME 100%
RESPONSE TIME
09-25 · 383ms avg09-25 · 383ms avg09-2509-25
AVG RESP 376ms
PRICE (captured 402, USD)
09-24 · $0.0609-25 · $0.06$0.0609-2409-25

Median across 8 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
building assessment history (1 day so far)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)
price percentile in Finance
site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)
no on-chain volume yet
DISTINCT BUYERS
no distinct buyers yet

COMPLIANCE

13/13 checks pass · grade A

last 402 captured 2026-08-11 · last up 2026-09-25

  • 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
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
● OK 348ms
● OK 350ms
● SLOW 1029ms
● OK 242ms
● OK 295ms
● OK 200ms
● OK 499ms
● OK 363ms
● OK 298ms
● OK 372ms
● OK 307ms
● OK 419ms
● OK 303ms
● OK 400ms
● OK 531ms
● OK 404ms
● OK 437ms
● OK 386ms
18 of 2,636 checks · live count

EMBED THIS BADGE

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

Polymarket Signal Detector listed on x402-list
status
Polymarket Signal Detector uptime on x402-list
live uptime
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</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 ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/polymarket-signal-detector/update.