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x402 Protocol Service Directory

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x402donghang Agent APIs

Data

payment-ready 2026-09-09, probe currently failing

Pay-per-call agent APIs led by live crypto narrative research: recent X and web evidence, CoinGecko market context, structured JSON, and source URLs. Also provides bilingual context briefs, summarization, and OpenAI-compatible chat. USDC via x402 on Base and Solana; no account or API key.

Pay from $0.001 to $0.05 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-13 (start of our harvest window) · $0.65 all-time · settled via coinbase

BASE URL https://x402donghang.duckdns.org │ WEBSITE https://x402donghang.duckdns.org/x402/ │ ENDPOINTS 8 │ NETWORK Base / Solana │ ASSET USDC │ MEMBER SINCE 2026-08-13 │ MONITORED SINCE 2026-08-13

VERDICT

ranking generation 3

mixed 73/100 #306 of 326 in Data by measured score

What the score read on this service: status offline, 90.4% uptime 30d, 914ms response p95, x402 compliance 13 of 13, $0.001 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 Data, 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 326 listings, this one among them. That set is wider than the 326 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 DATA

Other Data 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
StableEnrich strong 96 100% $1.9k
SniperX•x402 strong 95 100% $298.30
glim.sh strong 94 100% $25.74
cn402 strong 93 100% $34.79
x402node solid 93 100% $34.79
5 of 325 other ranked services in Data · see the whole category

ASSESSMENT

updated 4h 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 90.4%
uptime · latest daily rollup
0%
uptime 7d
0%
uptime 30d
90.4%
uptime 90d
94.3%
response p95
914ms
avg response
738ms
total checks
1,104

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

compliance A (13/13), stale (probe failing)

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

jump to compliance checklist

price $0.001 to $0.05 (p10 in Data)
price (min)
$0.001
price (max)
$0.05
category percentile (min)
p10 in Data
category percentile (max)
p58 in Data
endpoints / prices
8 / 5
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
4914d
registrar
Gandi SAS
hosting
custom
domain created
2013-04-12

Identity facts, not a risk score.

traction $0.023 30d · 3 buyers
volume 30d
$0.023
buyers 30d
3
settlements 30d
4
measured since
2026-08-13 (start of our harvest window)
last settlement
2026-09-05
top buyer share
87% of 30d volume (address, not entity)
trend 7d vs 30d
0.00x the 30d daily rate
networks
eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time
$0.65
settlements all-time
62
median settlement 30d
$0.001
max settlement 30d
$0.02
settled via
coinbase ($0.02, 4 tx)

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

Top buyer share is part of the ranking score: a higher share lowers the traction part of the score, by up to half when one address holds all 30d volume.

CHANGES

2 in 30d

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes schema changed 20d ago (2 in 30d)

schema changed · 20d ago

endpoint added POST /x402/v1/crypto-intel

endpoint added POST /x402/v1/single-brief

endpoint added POST /x402/v1/token-dd

endpoint added POST /x402/v1/watchlist-brief

schema added POST /x402/v1/crypto-intel exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /x402/v1/crypto-intel exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema added POST /x402/v1/single-brief exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /x402/v1/single-brief exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema added POST /x402/v1/token-dd exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /x402/v1/token-dd exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema added POST /x402/v1/watchlist-brief exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /x402/v1/watchlist-brief exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

price changed · 23d ago

POST /x402/v1/chat/completions · eip155:8453 · USDC: 20000 → 1000

POST /x402/v1/chat/completions · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · USDC: 20000 → 1000

Amounts are on-wire atomic units in the named asset.

see all changes for this service

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 /x402/v1/chat/completions $0.001 Base/Solana USDC header
POST /x402/v1/crypto-brief $0.01 Base/Solana USDC header
POST /x402/v1/crypto-intel $0.05 Base/Solana USDC header
POST /x402/v1/crypto-radar $0.02 Base/Solana USDC header
POST /x402/v1/single-brief $0.005 Base/Solana USDC header
POST /x402/v1/summarize $0.01 Base/Solana USDC header
POST /x402/v1/token-dd $0.01 Base/Solana USDC header
POST /x402/v1/watchlist-brief $0.05 Base/Solana USDC header
8 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /x402/v1/chat/completions 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://x402donghang.duckdns.org/x402/v1/chat/completions'
// 402 response (captured by monitor) · 7 payloads · click to expand 
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x7F394b1E127CBCEA346979E552A4227328385B3d",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "DzUgGWEzssF472WRZNEmMmnTxZRA9QCbYMeoQVYMdSN3",
        "amount": "50000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402donghang.duckdns.org/x402/v1/watchlist-brief",
      "mimeType": "",
      "description": "Bulk bilingual EN/ZH crypto watchlist briefs as structured JSON for agents. Input an array of tickers (1-10). Output one bias/thesis/risks/actions brief per symbol — a multi-asset snapshot in a single call. $0.05 USDC per call."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "focus": "ETF flows, funding, key levels",
              "locale": "zh",
              "symbols": [
                "BTC",
                "ETH",
                "SOL"
              ]
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "items": [
                {
                  "bias": "中性偏多",
                  "risks": [
                    "流动性抽离",
                    "宏观突发"
                  ],
                  "symbol": "BTC",
                  "thesis": "短线结构未破，但杠杆拥挤限制上行弹性。",
                  "actions": [
                    "轻仓观察",
                    "避免追高"
                  ],
                  "bullets": [
                    "现货支撑仍在",
                    "资金费率偏贵",
                    "等待回踩再加仓"
                  ],
                  "timeframe": "波段",
                  "confidence": 0.62,
                  "invalidation": "跌破关键支撑并放量"
                }
              ],
              "product": "watchlist-brief",
              "disclaimer": "信息整理，非投资建议"
            }
          }
        },
        "schema": {
          "type": "object",
          "$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": [
                    "symbols"
                  ],
                  "properties": {
                    "focus": {
                      "type": "string",
                      "description": "Optional shared focus: spot | perp | macro | news, max 300 characters"
                    },
                    "locale": {
                      "enum": [
                        "en",
                        "zh"
                      ],
                      "type": "string",
                      "description": "Output language; default zh"
                    },
                    "symbols": {
                      "type": "array",
                      "items": {
                        "type": "string",
                        "description": "Crypto ticker, e.g. BTC, ETH, SOL"
                      },
                      "maxItems": 10,
                      "minItems": 1,
                      "description": "Tickers to brief; one structured brief per symbol"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "maxItems": 11,
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x7F394b1E127CBCEA346979E552A4227328385B3d",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "DzUgGWEzssF472WRZNEmMmnTxZRA9QCbYMeoQVYMdSN3",
        "amount": "5000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402donghang.duckdns.org/x402/v1/single-brief",
      "mimeType": "",
      "description": "Single-symbol bilingual crypto brief at a micro price point for agents. Input one ticker plus optional focus/context. Output concise bias/thesis/bullets/risks/actions. $0.005 USDC per call — cheap enough for per-token loops."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "focus": "spot",
              "locale": "zh",
              "symbol": "BTC"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "bias": "中性偏多",
              "risks": [
                "宏观事件",
                "流动性收缩"
              ],
              "symbol": "BTC",
              "thesis": "短线企稳，等待量能确认。",
              "actions": [
                "观察",
                "回踩分批"
              ],
              "bullets": [
                "现货支撑稳固",
                "杠杆尚未过热"
              ],
              "product": "single-brief",
              "timeframe": "波段",
              "confidence": 0.6,
              "disclaimer": "信息整理，非投资建议",
              "invalidation": "跌破关键支撑"
            }
          }
        },
        "schema": {
          "type": "object",
          "$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": [
                    "symbol"
                  ],
                  "properties": {
                    "focus": {
                      "type": "string",
                      "maxLength": 64,
                      "description": "Optional focus: spot | perp | macro | news"
                    },
                    "locale": {
                      "enum": [
                        "en",
                        "zh"
                      ],
                      "type": "string",
                      "description": "Output language; default zh"
                    },
                    "symbol": {
                      "type": "string",
                      "maxLength": 20,
                      "minLength": 1,
                      "description": "Crypto ticker, e.g. BTC, ETH, SOL"
                    },
                    "context": {
                      "type": "string",
                      "maxLength": 6000,
                      "description": "Optional market notes or on-chain snapshot"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "maxItems": 11,
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x7F394b1E127CBCEA346979E552A4227328385B3d",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "DzUgGWEzssF472WRZNEmMmnTxZRA9QCbYMeoQVYMdSN3",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402donghang.duckdns.org/x402/v1/token-dd",
      "mimeType": "",
      "description": "Structured token due-diligence card for agents. Input a ticker (optionally a contract/mint address). Output risk score/level, liquidity, holder concentration, red and green flags, and a clear verdict. $0.01 USDC per call."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "locale": "zh",
              "symbol": "SOL",
              "address": "0x1234567890abcdef1234567890abcdef12345678"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "symbol": "SOL",
              "product": "token-dd",
              "verdict": "Tradeable with standard risk controls.",
              "liquidity": "thick on major venues",
              "red_flags": [],
              "disclaimer": "Automated research snapshot, not financial advice.",
              "risk_level": "low-medium",
              "risk_score": 2.4,
              "green_flags": [
                "active development",
                "strong volume"
              ],
              "holder_concentration": "moderate"
            }
          }
        },
        "schema": {
          "type": "object",
          "$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": [
                    "symbol"
                  ],
                  "properties": {
                    "focus": {
                      "type": "string",
                      "maxLength": 64,
                      "description": "Optional focus: liquidity | holders | security | narrative"
                    },
                    "locale": {
                      "enum": [
                        "en",
                        "zh"
                      ],
                      "type": "string",
                      "description": "Output language; default zh"
                    },
                    "symbol": {
                      "type": "string",
                      "maxLength": 20,
                      "minLength": 1,
                      "description": "Token ticker, e.g. SOL, HYPE"
                    },
                    "address": {
                      "type": "string",
                      "maxLength": 80,
                      "minLength": 20,
                      "description": "Optional contract/mint address for on-chain context"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "maxItems": 11,
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x7F394b1E127CBCEA346979E552A4227328385B3d",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "DzUgGWEzssF472WRZNEmMmnTxZRA9QCbYMeoQVYMdSN3",
        "amount": "50000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402donghang.duckdns.org/x402/v1/crypto-intel",
      "mimeType": "",
      "description": "Three-in-one crypto intelligence for agents: funding regime, liquidation risk, and market sentiment for one symbol. Input ticker plus window. $0.05 USDC per call — funding + liquidation + sentiment in one shot."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "locale": "zh",
              "symbol": "BTC",
              "window": "24h"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "symbol": "BTC",
              "funding": {
                "detail": "perp basis healthy",
                "regime": "neutral-to-positive",
                "extreme": false
              },
              "product": "crypto-intel",
              "sentiment": {
                "label": "cautiously bullish",
                "score": 0.42,
                "drivers": [
                  "ETF inflows",
                  "lower volatility"
                ]
              },
              "confidence": 0.65,
              "disclaimer": "信息整理，非投资建议",
              "liquidation": {
                "note": "open interest moderate",
                "risk": "low",
                "trigger_zone": "below recent range low"
              }
            }
          }
        },
        "schema": {
          "type": "object",
          "$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": [
                    "symbol"
                  ],
                  "properties": {
                    "locale": {
                      "enum": [
                        "en",
                        "zh"
                      ],
                      "type": "string",
                      "description": "Output language; default zh"
                    },
                    "symbol": {
                      "type": "string",
                      "maxLength": 20,
                      "minLength": 1,
                      "description": "Crypto ticker, e.g. BTC, ETH, SOL"
                    },
                    "window": {
                      "enum": [
                        "1h",
                        "6h",
                        "24h",
                        "7d"
                      ],
                      "type": "string",
                      "description": "Analysis window; default 24h"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "maxItems": 11,
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x7F394b1E127CBCEA346979E552A4227328385B3d",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "DzUgGWEzssF472WRZNEmMmnTxZRA9QCbYMeoQVYMdSN3",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402donghang.duckdns.org/x402/v1/summarize",
      "mimeType": "",
      "description": "Bilingual EN/ZH summary API for a public URL or raw text. Returns structured summary, key points, and actions. $0.01 USDC per call. Lightweight fetch, no headless browser."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "text": "这里是一段需要摘要的中文或英文正文……",
              "max_chars": 500
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "title": "标题（如有）",
              "source": {
                "type": "text",
                "chars_in": 1200
              },
              "actions": [
                "可执行动作1",
                "动作2",
                "动作3"
              ],
              "product": "summarize",
              "summary": "中文要点摘要……",
              "key_points": [
                "要点1",
                "要点2",
                "要点3"
              ]
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "properties": {
                    "url": {
                      "type": "string",
                      "description": "Public http(s) URL to fetch and summarize (optional if text given)"
                    },
                    "text": {
                      "type": "string",
                      "description": "Raw text to summarize (optional if url given)"
                    },
                    "locale": {
                      "type": "string",
                      "description": "Default zh"
                    },
                    "max_chars": {
                      "type": "number",
                      "description": "Target summary length in Chinese chars, default 500, max 1200"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "maxItems": 11,
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x7F394b1E127CBCEA346979E552A4227328385B3d",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "DzUgGWEzssF472WRZNEmMmnTxZRA9QCbYMeoQVYMdSN3",
        "amount": "20000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402donghang.duckdns.org/x402/v1/crypto-radar",
      "mimeType": "",
      "description": "Live crypto narrative and sentiment radar for AI agents. Searches recent X posts and the web, adds a verifiable CoinGecko market snapshot, and returns structured signals, risks, watch items, and source URLs. Input ticker + 1h/6h/24h/7d window. $0.02 USDC per call."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "focus": "ETF flows, regulation, exploits, exchange flows, and market-moving narratives",
              "locale": "en",
              "symbol": "BTC",
              "window": "6h"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "risks": [
                "A low-volatility range can break sharply in either direction."
              ],
              "market": {
                "provider": "CoinGecko",
                "price_usd": 63821,
                "change_24h_pct": 0.19
              },
              "symbol": "BTC",
              "window": "6h",
              "product": "crypto-radar",
              "signals": [],
              "sources": [
                {
                  "url": "https://example.com/source",
                  "type": "web",
                  "title": "Source title"
                }
              ],
              "summary": "ETF-flow support is offset by cautious positioning and low volatility.",
              "sentiment": "mixed",
              "confidence": 0.74,
              "disclaimer": "Information only, not financial advice.",
              "narratives": [
                {
                  "name": "ETF flows",
                  "direction": "supportive",
                  "evidence_urls": [
                    "https://example.com/source"
                  ]
                }
              ],
              "watch_next": [
                "Confirmed exchange-flow changes",
                "A break of the observed range"
              ],
              "observed_at": "2026-08-13T07:30:00.000Z",
              "source_count": 1,
              "sentiment_score": 0.12
            }
          }
        },
        "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": [
                    "symbol"
                  ],
                  "properties": {
                    "focus": {
                      "type": "string",
                      "description": "Optional research focus, max 300 characters"
                    },
                    "locale": {
                      "enum": [
                        "en",
                        "zh"
                      ],
                      "type": "string",
                      "description": "Output language; default en"
                    },
                    "symbol": {
                      "type": "string",
                      "description": "Crypto ticker, e.g. BTC, ETH, SOL, HYPE, XRP, DOGE"
                    },
                    "window": {
                      "enum": [
                        "1h",
                        "6h",
                        "24h",
                        "7d"
                      ],
                      "type": "string",
                      "description": "Freshness window; default 6h"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "maxItems": 11,
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x7F394b1E127CBCEA346979E552A4227328385B3d",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "DzUgGWEzssF472WRZNEmMmnTxZRA9QCbYMeoQVYMdSN3",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402donghang.duckdns.org/x402/v1/crypto-brief",
      "mimeType": "",
      "description": "Bilingual EN/ZH crypto market brief as structured JSON for agents. Input symbol plus optional caller context. Output bias, thesis, evidence bullets, risks, invalidation, and actions. $0.01 USDC per call."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "locale": "zh",
              "symbol": "BTC",
              "context": "funding 转正，现货稳，合约多头拥挤"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "bias": "中性偏多",
              "risks": [
                "流动性抽离",
                "宏观突发"
              ],
              "symbol": "BTC",
              "thesis": "短线结构未破，但杠杆拥挤限制上行弹性。",
              "actions": [
                "轻仓观察",
                "避免追高"
              ],
              "bullets": [
                "现货支撑仍在",
                "资金费率偏贵",
                "等待回踩再加仓"
              ],
              "product": "crypto-brief",
              "confidence": 0.62,
              "disclaimer": "信息整理，非投资建议",
              "invalidation": "跌破关键支撑并放量"
            }
          }
        },
        "schema": {
          "type": "object",
          "$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": [
                    "symbol"
                  ],
                  "properties": {
                    "focus": {
                      "type": "string",
                      "description": "Optional focus: spot | perp | macro | news"
                    },
                    "locale": {
                      "type": "string",
                      "description": "Default zh (Chinese brief)"
                    },
                    "symbol": {
                      "type": "string",
                      "description": "Ticker e.g. BTC / ETH / SOL / HYPE"
                    },
                    "context": {
                      "type": "string",
                      "description": "Optional market notes, news blurb, or on-chain snapshot (plain text)"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "maxItems": 11,
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the today (UTC) selector: uptime, response time, volume and buyers show the current UTC day so far, price and sub-scores the last 24 hours; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/x402donghang-agent-apis/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
09-27 · uptime 0.0%09-27 · uptime 0.0%09-2709-27
TODAY (UTC) UPTIME 0%
RESPONSE TIME
no data
AVG RESP 738ms
PRICE (captured 402, USD)
09-26 · $0.0109-27 · $0.01$0.0109-2609-27

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

SUB-SCORES (uptime + x402 compliance)
09-26 uptime: 90.3% compliance: 100% checks09-27 uptime: 90.4% compliance: 100% checksuptimecompliance09-2609-27

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 Data
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 in the current UTC day
DISTINCT BUYERS
no distinct buyers in the current UTC day

COMPLIANCE

13/13 checks pass · grade A · stale (probe failing)

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

  • 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
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18 of 1,105 checks · live count

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