x402 List

x402 Protocol Service Directory

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Herramientas Cobrables

Verification

Small deterministic pay-per-use services for AI agents: JSON contract validation, business margin and break-even calculations, and public stock quotes. Payments settle with x402 v2 using USDC on Base.

Pay from $0.01 to $0.25 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

listed 2026-08-03 · no on-chain settlement recorded yet

BASE URL https://herramientas-cobrables.consultoressasic.chatgpt.site │ WEBSITE https://herramientas-cobrables.consultoressasic.chatgpt.site │ ENDPOINTS 3 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-03 │ MONITORED SINCE 2026-08-03

ASSESSMENT

updated 2h 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
-
uptime 7d
-
uptime 30d
-
uptime 90d
-
response p95
607ms
avg response
607ms
total checks
1
compliance A (14/14)

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

jump to compliance checklist

price $0.01 to $0.25 (p34 in Verification)
price (min)
$0.01
price (max)
$0.25
category percentile (min)
p34 in Verification
category percentile (max)
p75 in Verification
endpoints / prices
3 / 3
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
1341d
registrar
MarkMonitor Inc.
hosting
custom
domain created
2022-12-01

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 paid API services for JSON validation, margin calculation, and stock quotes.

category
verification-tools
-validationfinancial-calculationsstock-data

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/paid/json-validate $0.01 Base USDC
GET /api/paid/margin-calculator $0.25 Base USDC
GET /api/paid/stock-quote $0.05 Base USDC
3 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/paid/json-validate returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://herramientas-cobrables.consultoressasic.chatgpt.site/api/paid/json-validate'
// 402 response (captured by monitor) · 3 payloads · click to expand 
[
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x77d42Af2c6C5ad5F005dA0aC527c43f202CE8F7a",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://herramientas-cobrables.consultoressasic.chatgpt.site/api/paid/json-validate",
      "mimeType": "application/json",
      "description": "Validate a JSON document and report missing required fields."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "json": "{\"name\":\"Ada\"}",
              "required": "name,email"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "result": {
                "valid": false,
                "fields": [
                  "name"
                ],
                "missing": [
                  "email"
                ],
                "isObject": true
              },
              "chargedUsd": "0.010000",
              "transactionHash": "0x..."
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input",
            "output"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "json"
                  ],
                  "properties": {
                    "json": {
                      "type": "string",
                      "maxLength": 50000,
                      "minLength": 2
                    },
                    "required": {
                      "type": "string",
                      "maxLength": 500
                    }
                  },
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type",
                "example"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "json"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "ok",
                    "result"
                  ],
                  "properties": {
                    "ok": {
                      "type": "boolean"
                    },
                    "result": {
                      "type": "object"
                    },
                    "chargedUsd": {
                      "type": "string"
                    },
                    "transactionHash": {
                      "type": "string"
                    }
                  }
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x77d42Af2c6C5ad5F005dA0aC527c43f202CE8F7a",
        "amount": "250000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://herramientas-cobrables.consultoressasic.chatgpt.site/api/paid/margin-calculator",
      "mimeType": "application/json",
      "description": "Calculate gross margin, net margin, and break-even point from business totals."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "units": "100",
              "revenue": "1000",
              "fixed_costs": "300",
              "variable_costs": "400"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "inputs": {
                "units": 100,
                "revenue": 1000,
                "fixedCosts": 300,
                "variableCosts": 400
              },
              "result": {
                "netProfit": 300,
                "grossProfit": 600,
                "netMarginPct": 30,
                "breakEvenUnits": 50,
                "grossMarginPct": 60,
                "breakEvenRevenue": 500
              },
              "chargedUsd": "0.250000",
              "transactionHash": "0x..."
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input",
            "output"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "revenue",
                    "variable_costs",
                    "fixed_costs",
                    "units"
                  ],
                  "properties": {
                    "units": {
                      "type": "string",
                      "pattern": "^[1-9]\\d*$"
                    },
                    "revenue": {
                      "type": "string",
                      "pattern": "^\\d+(?:\\.\\d+)?$"
                    },
                    "fixed_costs": {
                      "type": "string",
                      "pattern": "^\\d+(?:\\.\\d+)?$"
                    },
                    "variable_costs": {
                      "type": "string",
                      "pattern": "^\\d+(?:\\.\\d+)?$"
                    }
                  },
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type",
                "example"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "json"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "ok",
                    "inputs",
                    "result"
                  ],
                  "properties": {
                    "ok": {
                      "type": "boolean"
                    },
                    "inputs": {
                      "type": "object"
                    },
                    "result": {
                      "type": "object"
                    },
                    "chargedUsd": {
                      "type": "string"
                    },
                    "transactionHash": {
                      "type": "string"
                    }
                  }
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x77d42Af2c6C5ad5F005dA0aC527c43f202CE8F7a",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://herramientas-cobrables.consultoressasic.chatgpt.site/api/paid/stock-quote",
      "mimeType": "application/json",
      "description": "Return a current public market quote for one stock symbol."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "symbol": "AAPL"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "price": 200,
              "change": 1,
              "source": "public market data",
              "symbol": "AAPL",
              "currency": "USD",
              "exchange": "NMS",
              "changePct": 0.5025,
              "chargedUsd": "0.050000",
              "observedAt": "2026-01-01T00:00:00.000Z",
              "previousClose": 199,
              "transactionHash": "0x..."
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input",
            "output"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "symbol"
                  ],
                  "properties": {
                    "symbol": {
                      "type": "string",
                      "pattern": "^[A-Z0-9.^=-]{1,12}$"
                    }
                  },
                  "additionalProperties": false
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type",
                "example"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "json"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "ok",
                    "source",
                    "symbol",
                    "price"
                  ],
                  "properties": {
                    "ok": {
                      "type": "boolean"
                    },
                    "price": {
                      "type": "number"
                    },
                    "change": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "source": {
                      "type": "string"
                    },
                    "symbol": {
                      "type": "string"
                    },
                    "changePct": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "chargedUsd": {
                      "type": "string"
                    },
                    "observedAt": {
                      "type": [
                        "string",
                        "null"
                      ],
                      "format": "date-time"
                    },
                    "previousClose": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "transactionHash": {
                      "type": "string"
                    }
                  }
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts share the 7d window selected here. Every series is also served as JSON at /api/v1/services/herramientas-cobrables/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
08-03 · uptime 100.0% · 784ms avg08-0308-03
7d UPTIME 100%
RESPONSE TIME
08-03 · 784ms avg08-03 · 784ms avg08-0308-03
AVG RESP 1148ms
PRICE (captured 402, USD)
building price history ($0.05)

Median across 3 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 (7) · click to expand
TIME STATUS RESP
● SLOW 3333ms
● OK 608ms
● OK 521ms
● OK 1575ms
● OK 660ms
● OK 734ms
● OK 607ms
7 of 7 checks

EMBED THIS BADGE

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Herramientas Cobrables listed on x402-list
status
Herramientas Cobrables uptime on x402-list
live uptime
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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.

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