Prototype · per-check agent API · jobs-first heuristics

Livecheck

Before you scrape a job or product page, POST the URL. Livecheck fetches the source and returns live, closed, or unknown plus title and signals (apply form, sold-out, 404). Not a search engine. Price is $0.01 USDC on Base per request.

Try it

The 402 response includes a payment-required header (x402 v2, Stripe deposit address, USDC on Base).

{
  "x402Version": 2,
  "error": "PAYMENT-SIGNATURE header is required",
  "resource": {
    "url": "http://livecheck.fly.dev/v1/verify",
    "description": "Before you scrape a job or product page, POST the URL. Livecheck fetches the source and returns live, closed, or unknown plus title and signals (apply form, sold-out, 404). Not a search engine.",
    "mimeType": "application/json"
  },
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "amount": "10000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "payTo": "0x33693228b706cb30f4b4dbf35f79129a763f91c5",
      "maxTimeoutSeconds": 60,
      "extra": {
        "name": "USD Coin",
        "version": "2"
      }
    }
  ],
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "bodyType": "json",
          "body": {
            "url": "https://boards.greenhouse.io/example/jobs/1842"
          },
          "method": "POST"
        },
        "output": {
          "type": "json",
          "example": {
            "url": "https://boards.greenhouse.io/example/jobs/1842",
            "canonical_url": "https://boards.greenhouse.io/example/jobs/1842",
            "status": "live",
            "http_status": 200,
            "checked_at": "2026-08-30T21:00:00Z",
            "title": "Staff Backend Engineer — Northwind Labs",
            "signals": [
              "apply form present",
              "no closure banner"
            ],
            "confidence": 0.82,
            "price_usd": 0.01
          }
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "type": "object",
        "properties": {
          "input": {
            "type": "object",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "type": "string",
                "enum": [
                  "POST"
                ]
              },
              "bodyType": {
                "type": "string",
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ]
              },
              "body": {
                "properties": {
                  "url": {
                    "type": "string",
                    "description": "Absolute http(s) URL of the specific product or job page to check. Not a search-results URL."
                  }
                },
                "required": [
                  "url"
                ]
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ]
          },
          "output": {
            "type": "object",
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "properties": {
                  "url": {
                    "type": "string"
                  },
                  "canonical_url": {
                    "type": "string"
                  },
                  "status": {
                    "type": "string",
                    "enum": [
                      "live",
                      "closed",
                      "unknown"
                    ]
                  },
                  "http_status": {
                    "type": "number"
                  },
                  "checked_at": {
                    "type": "string"
                  },
                  "title": {
                    "type": "string"
                  },
                  "signals": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    }
                  },
                  "confidence": {
                    "type": "number"
                  },
                  "price_usd": {
                    "type": "number"
                  }
                },
                "required": [
                  "url",
                  "canonical_url",
                  "status",
                  "http_status",
                  "checked_at",
                  "signals",
                  "confidence",
                  "price_usd"
                ]
              }
            },
            "required": [
              "type"
            ]
          }
        },
        "required": [
          "input"
        ]
      }
    }
  }
}

Example 402 (decoded)

Header value is base64. Decoded shape:

{
  "x402Version": 2,
  "error": "PAYMENT-SIGNATURE header is required",
  "resource": {
    "url": "http://livecheck.fly.dev/v1/verify",
    "description": "Before you scrape a job or product page, POST the URL. Livecheck fetches the source and returns live, closed, or unknown plus title and signals (apply form, sold-out, 404). Not a search engine.",
    "mimeType": "application/json"
  },
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "amount": "10000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "payTo": "0x33693228b706cb30f4b4dbf35f79129a763f91c5",
      "maxTimeoutSeconds": 60,
      "extra": {
        "name": "USD Coin",
        "version": "2"
      }
    }
  ],
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "bodyType": "json",
          "body": {
            "url": "https://boards.greenhouse.io/example/jobs/1842"
          },
          "method": "POST"
        },
        "output": {
          "type": "json",
          "example": {
            "url": "https://boards.greenhouse.io/example/jobs/1842",
            "canonical_url": "https://boards.greenhouse.io/example/jobs/1842",
            "status": "live",
            "http_status": 200,
            "checked_at": "2026-08-30T21:00:00Z",
            "title": "Staff Backend Engineer — Northwind Labs",
            "signals": [
              "apply form present",
              "no closure banner"
            ],
            "confidence": 0.82,
            "price_usd": 0.01
          }
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "type": "object",
        "properties": {
          "input": {
            "type": "object",
            "additionalProperties": false,
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "type": "string",
                "enum": [
                  "POST"
                ]
              },
              "bodyType": {
                "type": "string",
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ]
              },
              "body": {
                "properties": {
                  "url": {
                    "type": "string",
                    "description": "Absolute http(s) URL of the specific product or job page to check. Not a search-results URL."
                  }
                },
                "required": [
                  "url"
                ]
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ]
          },
          "output": {
            "type": "object",
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "properties": {
                  "url": {
                    "type": "string"
                  },
                  "canonical_url": {
                    "type": "string"
                  },
                  "status": {
                    "type": "string",
                    "enum": [
                      "live",
                      "closed",
                      "unknown"
                    ]
                  },
                  "http_status": {
                    "type": "number"
                  },
                  "checked_at": {
                    "type": "string"
                  },
                  "title": {
                    "type": "string"
                  },
                  "signals": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    }
                  },
                  "confidence": {
                    "type": "number"
                  },
                  "price_usd": {
                    "type": "number"
                  }
                },
                "required": [
                  "url",
                  "canonical_url",
                  "status",
                  "http_status",
                  "checked_at",
                  "signals",
                  "confidence",
                  "price_usd"
                ]
              }
            },
            "required": [
              "type"
            ]
          }
        },
        "required": [
          "input"
        ]
      }
    }
  }
}

Encoded header starts eyJ4NDAyVmVyc2lvbiI6MiwiZXJyb3IiOiJQQVlNRU5ULVNJ…

Example verify JSON

{
  "url": "https://boards.greenhouse.io/northwind/jobs/1842",
  "canonical_url": "https://boards.greenhouse.io/northwind/jobs/1842",
  "status": "live",
  "http_status": 200,
  "checked_at": "2026-08-30T21:00:00Z",
  "title": "Staff Backend Engineer — Northwind Labs",
  "signals": [
    "apply form present",
    "no closure banner"
  ],
  "confidence": 0.82,
  "price_usd": 0.01
}

Local fixtures

Served by this process so you can exercise the classifier without the open web.

live-apply-now — 200 + Apply Now on a specific posting http://livecheck.fly.dev/fixtures/live-apply-now
closed-to-new-applications — Greenhouse: this job is closed to new applications http://livecheck.fly.dev/fixtures/closed-to-new-applications
closed-to-new-applications-lever — Lever: this job is closed to new applications http://livecheck.fly.dev/fixtures/closed-to-new-applications-lever
greenhouse-closed-job — Greenhouse job URL that redirects to the company board http://livecheck.fly.dev/fixtures/greenhouse-closed-job
greenhouse-board — Greenhouse board (empty-state after redirect) http://livecheck.fly.dev/fixtures/greenhouse-board
careers — Careers homepage / ATS board http://livecheck.fly.dev/fixtures/careers
jobs/9901 — Numeric job path that 302s to the board http://livecheck.fly.dev/fixtures/jobs/9901
gone-404 — HTTP 404 job URL http://livecheck.fly.dev/fixtures/gone-404

curl

curl -iv http://livecheck.fly.dev/v1/verify -H 'content-type: application/json' \
  -d '{"url":"https://boards.greenhouse.io/example/jobs/1"}'

# Real funds: Stripe's purl client from the x402 docs
purl http://livecheck.fly.dev/v1/verify -H 'content-type: application/json' \
  -d '{"url":"https://boards.greenhouse.io/example/jobs/1"}'

Not a search engine. Not an aggregator copy. HTML + status only — no page JS in v1. Paid route is POST /v1/verify. Free: GET / and GET /health. Mock header livecheck-dev is ignored when live keys are set.