x402 List

x402 Protocol Service Directory

SignalBrew

Finance

Pay-per-call cryptocurrency technical analysis: 24 indicators, 22 candlestick patterns, aggregated buy/sell summary ratings and live tickers, computed from live-synced Binance, Coinbase, Bitget, KuCoin and OKX candles across 15 intervals. Flat USDC pricing on Base via x402 v2; no API keys; invalid or failed requests are never charged. Free reference endpoints list every indicator, parameter and price.

Pay from $0.005 to $0.03 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

listed 2026-07-28 · no on-chain settlement recorded yet

BASE URL https://api.signalbrew.io WEBSITE https://signalbrew.io ENDPOINTS 5 NETWORK Base ASSET USDC MEMBER SINCE 2026-07-28 MONITORED SINCE 2026-07-28

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 100%
uptime 24h
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
100%
response p95
421ms
avg response
212ms
total checks
24
compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.005 to $0.03 (p33 in Finance)
price (min)
$0.005
price (max)
$0.03
category percentile (min)
p33 in Finance
category percentile (max)
p49 in Finance
endpoints / prices
5 / 2
model
tiered
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.

domain age
-
registrar
-
hosting
custom
domain created
---

Identity facts, not a risk score.

traction $0 30d · 0 buyers
volume 30d
$0
buyers 30d
0
settlements 30d
0
first settlement
---
last settlement
---
top buyer share
-
trend 7d vs 30d
-
networks
eip155:8453
volume all-time
$0
settlements all-time
0
median settlement 30d
$0
max settlement 30d
$0
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

Provides cryptocurrency technical analysis calculations and market data from various exchanges

category
crypto-analytics
in
path
cryptotechnical-analysismarket-dataindicatorsbinancecoinbase

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
GET /api/binance/BTC_USDT/1hour/indicators/macd $0.005 Base USDC
GET /api/binance/BTC_USDT/1hour/indicators/rsi $0.005 Base USDC
GET /api/binance/BTC_USDT/1hour/summary $0.03 Base USDC
GET /api/binance/BTC_USDT/ticker $0.005 Base USDC
GET /api/coinbase/BTC_USDT/1day/indicators/supertrend $0.005 Base USDC
5 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/binance/BTC_USDT/1hour/indicators/macd returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://api.signalbrew.io/api/binance/BTC_USDT/1hour/indicators/macd'
// 402 response (captured by monitor) · 5 payloads · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x4A9718ccf6232D49b2f32765FdAee9AC4d6e6B47",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.signalbrew.io/api/binance/BTC_USDT/1hour/indicators/rsi",
      "mimeType": "application/json",
      "description": "Relative strength index (rsi) of any listed cryptocurrency pair, computed on demand from live-synced Binance, Coinbase, Bitget, KuCoin and OKX candles across fifteen intervals. Part of the SignalBrew pay-per-call technical analysis catalog: one flat USDC price per calculation over the x402 protocol, and invalid requests are never charged."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "field": "close",
              "length": "14"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "params": {
                "field": "close",
                "length": 14
              },
              "result": {
                "value": "62.41"
              },
              "symbol": "BTC_USDT",
              "candles": {
                "to": "2026-07-20T23:00:00Z",
                "from": "2026-07-20T10:00:00Z",
                "count": 14
              },
              "exchange": "binance",
              "interval": "1hour",
              "indicator": "rsi"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {
                    "field": {
                      "type": "string",
                      "description": "The candle field the indicator is calculated from; the full parameter catalog of every indicator is served by the free /api/indicators endpoint."
                    },
                    "length": {
                      "type": "string",
                      "description": "The number of candles the indicator is calculated from."
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "params": {
                      "type": "object"
                    },
                    "result": {
                      "type": "object",
                      "description": "The indicator specific result values as decimal strings."
                    },
                    "symbol": {
                      "type": "string"
                    },
                    "candles": {
                      "type": "object"
                    },
                    "exchange": {
                      "type": "string"
                    },
                    "interval": {
                      "type": "string"
                    },
                    "indicator": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x4A9718ccf6232D49b2f32765FdAee9AC4d6e6B47",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.signalbrew.io/api/binance/BTC_USDT/1hour/indicators/macd",
      "mimeType": "application/json",
      "description": "Moving average convergence divergence with the signal line and the histogram (macd) of any listed cryptocurrency pair, computed on demand from live-synced Binance, Coinbase, Bitget, KuCoin and OKX candles across fifteen intervals. Part of the SignalBrew pay-per-call technical analysis catalog: one flat USDC price per calculation over the x402 protocol, and invalid requests are never charged."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "field": "close",
              "length": "14"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "params": {
                "field": "close",
                "length": 14
              },
              "result": {
                "value": "62.41"
              },
              "symbol": "BTC_USDT",
              "candles": {
                "to": "2026-07-20T23:00:00Z",
                "from": "2026-07-20T10:00:00Z",
                "count": 14
              },
              "exchange": "binance",
              "interval": "1hour",
              "indicator": "rsi"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {
                    "field": {
                      "type": "string",
                      "description": "The candle field the indicator is calculated from; the full parameter catalog of every indicator is served by the free /api/indicators endpoint."
                    },
                    "length": {
                      "type": "string",
                      "description": "The number of candles the indicator is calculated from."
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "params": {
                      "type": "object"
                    },
                    "result": {
                      "type": "object",
                      "description": "The indicator specific result values as decimal strings."
                    },
                    "symbol": {
                      "type": "string"
                    },
                    "candles": {
                      "type": "object"
                    },
                    "exchange": {
                      "type": "string"
                    },
                    "interval": {
                      "type": "string"
                    },
                    "indicator": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x4A9718ccf6232D49b2f32765FdAee9AC4d6e6B47",
        "amount": "30000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.signalbrew.io/api/binance/BTC_USDT/1hour/summary",
      "mimeType": "application/json",
      "description": "Aggregated cryptocurrency technical analysis rating in a single call: simple and exponential moving averages of three lengths, RSI, stochastic, CCI, Williams %R, MFI, MACD, ADX and SuperTrend each vote buy, neutral or sell, and the votes combine into an overall rating from strong-buy to strong-sell. Computed from live-synced Binance, Coinbase, Bitget, KuCoin and OKX candles, paid in USDC via the x402 protocol."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET"
          },
          "output": {
            "type": "json",
            "example": {
              "result": {
                "buy": 8,
                "sell": 5,
                "score": "0.21",
                "votes": [
                  {
                    "name": "sma-10",
                    "vote": "buy",
                    "value": "117201.4"
                  },
                  {
                    "name": "rsi-14",
                    "vote": "sell",
                    "value": "71.24"
                  }
                ],
                "rating": "buy",
                "neutral": 1
              },
              "symbol": "BTC_USDT",
              "candles": {
                "to": "2026-07-24T16:00:00Z",
                "from": "2026-07-20T10:00:00Z",
                "count": 99
              },
              "exchange": "binance",
              "interval": "1hour"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "result": {
                      "type": "object",
                      "description": "The overall rating, the vote balance score and every indicator vote of the basket."
                    },
                    "symbol": {
                      "type": "string"
                    },
                    "candles": {
                      "type": "object"
                    },
                    "exchange": {
                      "type": "string"
                    },
                    "interval": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x4A9718ccf6232D49b2f32765FdAee9AC4d6e6B47",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.signalbrew.io/api/binance/BTC_USDT/ticker",
      "mimeType": "application/json",
      "description": "Live cryptocurrency price quote in a single call: the last traded price along with the ask, the bid, the 24 hour change, the percentage change and the traded volume of any symbol listed on Binance, Coinbase, Bitget, KuCoin or OKX, paid in USDC via the x402 protocol."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET"
          },
          "output": {
            "type": "json",
            "example": {
              "result": {
                "ask": "117201.5",
                "bid": "117201.3",
                "last": "117201.4",
                "change": "-1230.6",
                "volume": "18432.71",
                "percentChange": "-1.04"
              },
              "symbol": "BTC_USDT",
              "exchange": "binance"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "result": {
                      "type": "object",
                      "description": "The last traded price along with the ask, the bid, the 24 hour change values and the traded volume as decimal strings."
                    },
                    "symbol": {
                      "type": "string"
                    },
                    "exchange": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x4A9718ccf6232D49b2f32765FdAee9AC4d6e6B47",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.signalbrew.io/api/coinbase/BTC_USDT/1day/indicators/supertrend",
      "mimeType": "application/json",
      "description": "SuperTrend value with its trend direction (supertrend) of any listed cryptocurrency pair, computed on demand from live-synced Binance, Coinbase, Bitget, KuCoin and OKX candles across fifteen intervals. Part of the SignalBrew pay-per-call technical analysis catalog: one flat USDC price per calculation over the x402 protocol, and invalid requests are never charged."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "field": "close",
              "length": "14"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "params": {
                "field": "close",
                "length": 14
              },
              "result": {
                "value": "62.41"
              },
              "symbol": "BTC_USDT",
              "candles": {
                "to": "2026-07-20T23:00:00Z",
                "from": "2026-07-20T10:00:00Z",
                "count": 14
              },
              "exchange": "binance",
              "interval": "1hour",
              "indicator": "rsi"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "properties": {
                    "field": {
                      "type": "string",
                      "description": "The candle field the indicator is calculated from; the full parameter catalog of every indicator is served by the free /api/indicators endpoint."
                    },
                    "length": {
                      "type": "string",
                      "description": "The number of candles the indicator is calculated from."
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "properties": {
                    "params": {
                      "type": "object"
                    },
                    "result": {
                      "type": "object",
                      "description": "The indicator specific result values as decimal strings."
                    },
                    "symbol": {
                      "type": "string"
                    },
                    "candles": {
                      "type": "object"
                    },
                    "exchange": {
                      "type": "string"
                    },
                    "interval": {
                      "type": "string"
                    },
                    "indicator": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts share the 30d window selected here. Every series is also served as JSON at /api/v1/services/signalbrew/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
07-28 · uptime 100.0% · 205ms avg07-2807-28
30d UPTIME 100%
RESPONSE TIME
07-28 · 205ms avg07-28 · 205ms avg07-2807-28
AVG RESP 210ms
PRICE (captured 402, USD)
building price history ($0.005)

Median across 5 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
building assessment history (1 day so far)
VOLUME (on-chain settlement, USD)
no on-chain volume yet
DISTINCT BUYERS
no distinct buyers yet

COMPLIANCE

14/14 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
  • 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) · click to expand
TIME STATUS RESP
● OK 206ms
● SLOW 383ms
● SLOW 351ms
● OK 158ms
● OK 206ms
● OK 193ms
● OK 229ms
● OK 193ms
● OK 273ms
● OK 254ms
● OK 313ms
● OK 38ms
● OK 161ms
● OK 101ms
● OK 39ms
● OK 100ms
● OK 19ms
● OK 297ms

EMBED THIS BADGE

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

SignalBrew listed on x402-list
status
SignalBrew uptime on x402-list
live uptime
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// HTML · live uptime variant
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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 ]