FluxProof

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Evidence-bearing public webpage monitoring with hashes, diffs, signed webhooks, REST, and MCP.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "FluxProof": {
      "url": "https://fluxproof.tryneverclosed.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (6)

• fluxproof_preflight read-only

  Fetch a public URL and return fetchability, size, final URL, title, and content hash without page content or payment. How it works: given one public page address, FluxProof fetches it once and says whether it can watch it; nothing is created or charged. Example: {"url":"https://example.com/"}.

  Parameters:

  • url (required) — string — Required: the full address of one public web page, for example https://example.com/ or https://store.example.com/products/item. Not a search phrase or product name. No sign-in, cookies, browser rendering or private-network targets.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• fluxproof_get_free_key

  Create a free FluxProof API key: one page, checked daily, for 30 days, no card. One per network per month. The key is returned once and is a secret credential.

  Hints: read-only no · destructive no · idempotent no · open-world no

• fluxproof_offer read-only

  Return free and paid boundaries and purchase routes without charging. Returns the free daily plan, the $9 paid pass (30 days paid once; when offered, also $9 a month through the human checkout, cancel any time), the human checkout link and the agent payment route. Example: {}. Reading the offer charges nothing.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• fluxproof_create_monitor

  Create a monitor using a buyer-owned FluxProof API key. Creates persistent state and performs a baseline check, consuming quota. Not idempotent: each call creates a new monitor.

  Parameters:

  • url (required) — string — Required: the full address of one public web page, for example https://example.com/ or https://store.example.com/products/item. Not a search phrase or product name. No sign-in, cookies, browser rendering or private-network targets.
  • label — string — Optional human-readable monitor label, up to 120 characters.
  • api_key — string — Buyer-owned FluxProof API key; a secret credential.
  • watch_terms — array — Optional terms to track, each 2–80 characters; at most 20 distinct terms.
  • webhook_url — string — Optional public HTTPS webhook receiver; paid pass required. Delivery is signed and can occur when checks run.
  • interval_minutes — integer — Requested schedule in minutes. Free keys use 1440 (daily); paid passes have a 15-minute minimum.

  Hints: read-only no · destructive no · idempotent no · open-world yes

• fluxproof_check_now

  Run a monitor now and return a source- and hash-bound change receipt. Consumes check quota, stores a receipt and may deliver a configured webhook. Not an idempotent read.

  Parameters:

  • monitor_id (required) — string — Exact monitor_id returned when this key created the monitor; another account cannot access it.
  • api_key — string — Buyer-owned FluxProof API key; a secret credential.

  Hints: read-only no · destructive no · idempotent no · open-world yes

• fluxproof_list_changes read-only

  List recent evidence receipts for a monitor.

  Parameters:

  • monitor_id (required) — string — Exact monitor_id returned when this key created the monitor; another account cannot access it.
  • limit — integer — Maximum recent receipts requested; defaults to 20. History access is restricted by the key’s plan.
  • api_key — string — Buyer-owned FluxProof API key; a secret credential.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

Publisher website Repository

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.