x402 List

x402 Protocol Service Directory

●

Basalt

AI PAYMENT-READY

payment-ready until 2026-10-06

Basalt vende 8 herramientas de utilidad a agentes de IA (extracción de metadata de URL, verificación de dominios vía RDAP, validación de email/MX, HTML a Markdown, generación de QR, extracción de texto de PDF, chequeo de certificados TLS, detección de idioma), cobrando por uso en USDC vía x402 sobre Base.

Pay from $0.002 to $0.01 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

listed 2026-09-14 · no on-chain settlement recorded yet

BASE URL https://basalt-n6lt.onrender.com │ WEBSITE https://basalt-n6lt.onrender.com │ ENDPOINTS 8 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-09-14 │ MONITORED SINCE 2026-09-14

VERDICT

ranking generation 3

solid 85/100 #51 of 162 in AI by measured score

What the score read on this service: status online, 79.7% uptime 30d, 551ms response p95, x402 compliance 14 of 14, $0.002 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 AI, 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 162 listings, this one among them. That set is wider than the 162 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 AI

Other AI 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
Otto AI strong 95 100% $56.13
NetIntel strong 94 100% $16.76
x402engine strong 93 100% $28.00
GlianaAI solid 93 100% $68.10
Agent402.tools solid 92 99.7% $138.77
5 of 161 other ranked services in AI · see the whole category

ASSESSMENT

updated 6h 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 79.7%
uptime · latest daily rollup
87.8%
uptime 7d
86.5%
uptime 30d
79.7%
uptime 90d
79.7%
response p95
551ms
avg response
372ms
total checks
1,271

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

compliance A (14/14)

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

jump to compliance checklist

price $0.002 to $0.01 (p21 in AI)
price (min)
$0.002
price (max)
$0.01
category percentile (min)
p21 in AI
category percentile (max)
p23 in AI
endpoints / prices
8 / 4
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
free host
domain created
---

Identity facts, not a risk score.

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

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

Top buyer share is 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.

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 /domain-check $0.01 Base USDC header
POST /email-check $0.005 Base USDC header
POST /extract $0.005 Base USDC header
POST /html-to-markdown $0.003 Base USDC header
POST /language-detect $0.002 Base USDC header
POST /pdf-extract $0.01 Base USDC header
POST /qrcode $0.002 Base USDC header
POST /ssl-check $0.005 Base USDC header
8 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /domain-check 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://basalt-n6lt.onrender.com/domain-check'
// 402 response (captured by monitor) · 8 payloads · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/extract",
      "tags": [
        "basalt",
        "agent-tools",
        "url-metadata"
      ],
      "mimeType": "",
      "description": "Extracts title, description, image, and clean text from a URL — built for other agents to consume.",
      "serviceName": "Basalt: url-metadata"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://example.com"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "url": "https://example.com",
              "image": null,
              "title": "Example Domain",
              "siteName": "Example",
              "description": "Example Domain for use in illustrative examples.",
              "textExcerpt": "This domain is for use in illustrative examples in documents.",
              "canonicalUrl": "https://example.com"
            }
          }
        },
        "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": [
                    "url"
                  ],
                  "properties": {
                    "url": {
                      "type": "string",
                      "format": "uri"
                    }
                  }
                },
                "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",
                  "required": [
                    "url",
                    "textExcerpt"
                  ],
                  "properties": {
                    "url": {
                      "type": "string"
                    },
                    "image": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "title": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "siteName": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "description": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "textExcerpt": {
                      "type": "string"
                    },
                    "canonicalUrl": {
                      "type": [
                        "string",
                        "null"
                      ]
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/domain-check",
      "tags": [
        "basalt",
        "agent-tools",
        "domain-check"
      ],
      "mimeType": "",
      "description": "Checks whether a domain is available to register via RDAP, or who owns it and when it expires if not.",
      "serviceName": "Basalt: domain-check"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "domain": "example.com"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "domain": "example.com",
              "status": [
                "active"
              ],
              "available": false,
              "createdAt": "1995-08-14T04:00:00Z",
              "expiresAt": "2026-08-13T04:00:00Z",
              "registrar": "RESERVED-Internet Assigned Numbers Authority"
            }
          }
        },
        "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": [
                    "domain"
                  ],
                  "properties": {
                    "domain": {
                      "type": "string"
                    }
                  }
                },
                "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",
                  "required": [
                    "domain",
                    "available"
                  ],
                  "properties": {
                    "domain": {
                      "type": "string"
                    },
                    "status": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "available": {
                      "type": "boolean"
                    },
                    "createdAt": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "expiresAt": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "registrar": {
                      "type": [
                        "string",
                        "null"
                      ]
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/email-check",
      "tags": [
        "basalt",
        "agent-tools",
        "email-check"
      ],
      "mimeType": "",
      "description": "Validates email syntax and confirms real MX records for the domain — filters out addresses that can't receive mail.",
      "serviceName": "Basalt: email-check"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "email": "[email protected]"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "email": "[email protected]",
              "domain": "example.com",
              "mxHosts": [
                "mail.example.com"
              ],
              "deliverable": true,
              "validSyntax": true,
              "hasMxRecords": true
            }
          }
        },
        "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": [
                    "email"
                  ],
                  "properties": {
                    "email": {
                      "type": "string",
                      "format": "email"
                    }
                  }
                },
                "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",
                  "required": [
                    "email",
                    "validSyntax",
                    "deliverable"
                  ],
                  "properties": {
                    "email": {
                      "type": "string"
                    },
                    "domain": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "mxHosts": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "deliverable": {
                      "type": "boolean"
                    },
                    "validSyntax": {
                      "type": "boolean"
                    },
                    "hasMxRecords": {
                      "type": "boolean"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "3000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/html-to-markdown",
      "tags": [
        "basalt",
        "agent-tools",
        "html-to-markdown"
      ],
      "mimeType": "",
      "description": "Converts HTML to clean Markdown — so an agent doesn't have to build its own converter.",
      "serviceName": "Basalt: html-to-markdown"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "html": "<h1>Hello</h1><p>World</p>"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "markdown": "# Hello\n\nWorld"
            }
          }
        },
        "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": [
                    "html"
                  ],
                  "properties": {
                    "html": {
                      "type": "string"
                    }
                  }
                },
                "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",
                  "required": [
                    "markdown"
                  ],
                  "properties": {
                    "markdown": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/qrcode",
      "tags": [
        "basalt",
        "agent-tools",
        "qrcode"
      ],
      "mimeType": "",
      "description": "Generates a QR code (PNG, base64) for a text string or URL.",
      "serviceName": "Basalt: qrcode"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "text": "https://basalt-n6lt.onrender.com"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "text": "https://basalt-n6lt.onrender.com",
              "image": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII="
            }
          }
        },
        "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": [
                    "text"
                  ],
                  "properties": {
                    "text": {
                      "type": "string"
                    }
                  }
                },
                "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",
                  "required": [
                    "text",
                    "image"
                  ],
                  "properties": {
                    "text": {
                      "type": "string"
                    },
                    "image": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/pdf-extract",
      "tags": [
        "basalt",
        "agent-tools",
        "pdf-extract"
      ],
      "mimeType": "",
      "description": "Extracts the text from a PDF given its URL.",
      "serviceName": "Basalt: pdf-extract"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://bitcoin.org/bitcoin.pdf"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "url": "https://bitcoin.org/bitcoin.pdf",
              "text": "Bitcoin: A Peer-to-Peer Electronic Cash System\n\nSatoshi Nakamoto\[email protected]\n...",
              "pages": 9,
              "truncated": false
            }
          }
        },
        "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": [
                    "url"
                  ],
                  "properties": {
                    "url": {
                      "type": "string",
                      "format": "uri"
                    }
                  }
                },
                "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",
                  "required": [
                    "url",
                    "pages",
                    "text"
                  ],
                  "properties": {
                    "url": {
                      "type": "string"
                    },
                    "text": {
                      "type": "string"
                    },
                    "pages": {
                      "type": "number"
                    },
                    "truncated": {
                      "type": "boolean"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/ssl-check",
      "tags": [
        "basalt",
        "agent-tools",
        "ssl-check"
      ],
      "mimeType": "",
      "description": "Checks a domain's TLS certificate: validity, issuer, and days until expiry.",
      "serviceName": "Basalt: ssl-check"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "domain": "example.com"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "valid": true,
              "domain": "example.com",
              "issuer": "DigiCert Inc",
              "expired": false,
              "subject": "example.com",
              "validTo": "2026-01-01T00:00:00Z",
              "validFrom": "2025-01-01T00:00:00Z",
              "daysUntilExpiry": 114
            }
          }
        },
        "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": [
                    "domain"
                  ],
                  "properties": {
                    "domain": {
                      "type": "string"
                    }
                  }
                },
                "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",
                  "required": [
                    "domain",
                    "valid",
                    "validTo"
                  ],
                  "properties": {
                    "valid": {
                      "type": "boolean"
                    },
                    "domain": {
                      "type": "string"
                    },
                    "issuer": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "expired": {
                      "type": "boolean"
                    },
                    "subject": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "validTo": {
                      "type": "string"
                    },
                    "validFrom": {
                      "type": "string"
                    },
                    "daysUntilExpiry": {
                      "type": "number"
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x1816489D28C8C9fD2EdE2d38B1A52EedA54e8FDb",
        "amount": "2000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "http://basalt-n6lt.onrender.com/language-detect",
      "tags": [
        "basalt",
        "agent-tools",
        "language-detect"
      ],
      "mimeType": "",
      "description": "Detects the language of a text (186 languages supported), returning the top 3 most likely matches.",
      "serviceName": "Basalt: language-detect"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "text": "Hello, this is a test."
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "language": "eng",
              "confident": true,
              "candidates": [
                {
                  "code": "eng",
                  "score": 0.98
                },
                {
                  "code": "sco",
                  "score": 0.01
                },
                {
                  "code": "gla",
                  "score": 0.005
                }
              ]
            }
          }
        },
        "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": [
                    "text"
                  ],
                  "properties": {
                    "text": {
                      "type": "string"
                    }
                  }
                },
                "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",
                  "required": [
                    "language",
                    "confident"
                  ],
                  "properties": {
                    "language": {
                      "type": "string"
                    },
                    "confident": {
                      "type": "boolean"
                    },
                    "candidates": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "code": {
                            "type": "string"
                          },
                          "score": {
                            "type": "number"
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/basalt/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
09-14 · uptime 66.7% · 224ms avg09-15 · uptime 62.2% · 224ms avg09-16 · uptime 70.8% · 339ms avg09-17 · uptime 74.4% · 366ms avg09-18 · uptime 77.8% · 370ms avg09-19 · uptime 82.2% · 266ms avg09-20 · uptime 68.9% · 372ms avg09-21 · uptime 77.8% · 327ms avg09-22 · uptime 81.1% · 422ms avg09-23 · uptime 87.8% · 570ms avg09-24 · uptime 90.0% · 413ms avg09-25 · uptime 82.2% · 382ms avg09-26 · uptime 86.7% · 451ms avg09-27 · uptime 90.0% · 367ms avg09-28 · uptime 87.8% · 300ms avg09-14 · uptime 66.7% · 224ms avg09-15 · uptime 62.2% · 224ms avg09-16 · uptime 70.8% · 339ms avg09-17 · uptime 74.4% · 366ms avg09-18 · uptime 77.8% · 370ms avg09-19 · uptime 82.2% · 266ms avg09-20 · uptime 68.9% · 372ms avg09-21 · uptime 77.8% · 327ms avg09-22 · uptime 81.1% · 422ms avg09-23 · uptime 87.8% · 570ms avg09-24 · uptime 90.0% · 413ms avg09-25 · uptime 82.2% · 382ms avg09-26 · uptime 86.7% · 451ms avg09-27 · uptime 90.0% · 367ms avg09-28 · uptime 87.8% · 300ms avg09-29 · uptime 100.0% · 292ms avg09-1409-29
30D UPTIME 80%
RESPONSE TIME
09-14 · 224ms avg09-14 · 224ms avg09-15 · 224ms avg09-15 · 224ms avg09-16 · 339ms avg09-16 · 339ms avg09-17 · 366ms avg09-17 · 366ms avg09-18 · 370ms avg09-18 · 370ms avg09-19 · 266ms avg09-19 · 266ms avg09-20 · 372ms avg09-20 · 372ms avg09-21 · 327ms avg09-21 · 327ms avg09-22 · 422ms avg09-22 · 422ms avg09-23 · 570ms avg09-23 · 570ms avg09-24 · 413ms avg09-24 · 413ms avg09-25 · 382ms avg09-25 · 382ms avg09-26 · 451ms avg09-26 · 451ms avg09-27 · 367ms avg09-27 · 367ms avg09-28 · 300ms avg09-28 · 300ms avg09-29 · 292ms avg09-29 · 292ms avg09-1409-29
AVG RESP 370ms
PRICE (captured 402, USD)
09-14 · $0.00509-29 · $0.005$0.00509-1409-29

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

SUB-SCORES (uptime + x402 compliance)
09-14 compliance: 100% checks09-15 uptime: 60.7% compliance: 100% checks09-16 uptime: 66.5% compliance: 100% checks09-17 uptime: 68.8% compliance: 100% checks09-18 uptime: 70.2% compliance: 100% checks09-19 uptime: 73.3% compliance: 100% checks09-20 uptime: 72.5% compliance: 100% checks09-21 uptime: 73.4% compliance: 100% checks09-22 uptime: 74.0% compliance: 100% checks09-23 uptime: 75.4% compliance: 100% checks09-24 uptime: 76.8% compliance: 100% checks09-25 uptime: 77.6% compliance: 100% checks09-26 uptime: 78.3% compliance: 100% checks09-27 uptime: 79.3% compliance: 100% checks09-28 uptime: 79.7% compliance: 100% checksuptimecompliance09-1409-28

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

PILLARS OVER TIME (measured)

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

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

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-14 · last up 2026-09-29

  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
● OK 259ms
● OK 218ms
● OK 216ms
● OK 228ms
● SLOW 615ms
● OK 280ms
● OK 388ms
● OK 190ms
● OK 232ms
● OK 209ms
● OK 307ms
● OK 479ms
● OK 291ms
● OK 268ms
● OK 257ms
● OK 195ms
● OK 417ms
○ DOWN 2501ms timeout: timeout after 10000ms

EMBED THIS BADGE

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

Basalt listed on x402-list
status
Basalt uptime on x402-list
live uptime
// HTML
<a href="https://x402-list.com/services/basalt?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/basalt.svg" alt="Basalt listed on x402-list" height="28">
</a>
// Markdown
[![Basalt on x402-list](https://x402-list.com/badge/basalt.svg)](https://x402-list.com/services/basalt?utm_source=badge&utm_medium=referral&utm_campaign=embed)
// HTML · live uptime variant
<a href="https://x402-list.com/services/basalt?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/basalt.svg?data=uptime" alt="Basalt uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

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

[ update this listing ]

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

[ verify this service ($0.25) ]

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