check_payment_setup

Call this after building or changing a paid (x402) endpoint, or when agents' payments fail: we call it unpaid like a paying agent, read the 402, and check the payment request parses (v1 or v2), the token's EIP-712 domain (extra.name/version) matches the contract on-chain (the usual cause of 'invalid signature' payments), network id, amount, payTo, timeout, CORS headers for browser agents, resource URL, description and Bazaar discovery. Pass / warn / fail per check with exact fixes. Never pays.

read-only

Argument	Type	Description
url*	string	The paid endpoint's public https:// URL (an x402 resource).
body	object	Optional example JSON body for POST endpoints.
method	string	HTTP method the endpoint expects (default GET).

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "The paid endpoint's public https:// URL (an x402 resource)."
    },
    "body": {
      "type": "object",
      "description": "Optional example JSON body for POST endpoints."
    },
    "method": {
      "enum": [
        "GET",
        "POST"
      ],
      "type": "string",
      "description": "HTTP method the endpoint expects (default GET)."
    }
  }
}

enrich_catalog

For retailers and marketplaces (API key required): up to 50 products per call (SKU with title, URL or GTIN) in; each product's compatibility attributes out (standards it takes and provides, numeric limits, evidence level, freshness), ready to add to a product feed or UCP catalog so agents can match it to what shoppers own.

read-only

Argument	Type	Description
items*	array
research	boolean	Default true: research up to 10 items per call that aren't in our catalog (from the manufacturer's page).

Input schema (JSON)

{
  "type": "object",
  "required": [
    "items"
  ],
  "properties": {
    "items": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "description": "Your SKU or offer id (echoed back)."
          },
          "url": {
            "type": "string"
          },
          "gtin": {
            "type": "string"
          },
          "brand": {
            "type": "string"
          },
          "model": {
            "type": "string"
          },
          "title": {
            "type": "string"
          }
        }
      },
      "maxItems": 50,
      "minItems": 1
    },
    "research": {
      "type": "boolean",
      "description": "Default true: research up to 10 items per call that aren't in our catalog (from the manufacturer's page)."
    }
  }
}

how_it_works

What Tethered Trust is, what it covers, where its data comes from, pricing and terms.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {}
}

launch_check

Call this after building or deploying an MCP server or paid agent API, or when its listings may be out of date: we check it works (as verify_mcp does), then look it up in the official MCP Registry (and whether the listed version is current), Glama, PulseMCP, the x402 Bazaar, npm and PyPI, plus its server card, llms.txt and robots.txt (Smithery, PulseMCP, mcp.so and Claude's directory are listed with links to check by hand). Returns a score, what's missing or stale, an ordered fix plan and a ready-to-publish server.json. Read-only.

read-only

Argument	Type	Description
npm	string	Optional: npm package name to check.
url*	string	The MCP server's public https:// endpoint, e.g. https://example.com/mcp.
name	string	Optional: the server's display name, to search directories (defaults to the name the server reports).
pypi	string	Optional: PyPI project name to check.
description	string	Optional: one-line description for the generated server.json (max 100 characters).
registry_name	string	Optional: its official MCP Registry name, e.g. com.example/server.

Input schema (JSON)

launch_plan

For sellers: 30 days of official MCP Registry publishing on every new version, a daily listing watch (registry, Glama, x402 Bazaar, npm, PyPI, health) and daily payment checks of up to 10 x402 endpoints, with one signed webhook. $12 per 30 days; renew with plan_id.

Argument	Type	Description
npm	string
url	string	Your MCP server's public https:// endpoint (listing watch + registry publishing).
pypi	string
title	string
domain	string
plan_id	string	To renew: an existing plan_id (adds 30 days to everything).
publish	boolean	Publish to the official MCP Registry (default true).
webhook	string	Public https:// URL for signed listing.changed, payment.changed and plan.expiring events.
api_host	string	Host of your paid x402 API, e.g. api.example.com (we use the endpoints the x402 Bazaar lists for it).
endpoints

launch_plan_status

Where a Launch Plan stands: listings, registry version and each paid endpoint's payment check. Free.

read-only

Argument	Type	Description
plan_id*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "plan_id"
  ],
  "properties": {
    "plan_id": {
      "type": "string"
    }
  }
}

listing_status

Where a watched MCP server stands right now: each directory's status, the latest changes, and when the watch ends. Free.

read-only

Argument	Type	Description
watch_id*	string	The watch_id from watch_listing.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "watch_id"
  ],
  "properties": {
    "watch_id": {
      "type": "string",
      "description": "The watch_id from watch_listing."
    }
  }
}

publish_to_registry

Call this to get an MCP server into the official MCP Registry (which Glama, PulseMCP and others import from) without mcp-publisher or DNS: first call with url returns a one-line file to host at https://<domain>/.well-known/mcp-registry-auth; once it's up, call again with publisher_id and we publish server.json under your domain's namespace, then re-publish every new version automatically for 90 days. $5, charged only when we publish. Remove the file to revoke.

Argument	Type	Description
url	string	The MCP server's public https:// endpoint (Streamable HTTP).
slug	string	Optional: the part after the slash in the registry name.
title	string
domain	string	Optional: the domain to verify (default: the URL's main domain, e.g. example.com for mcp.example.com). Becomes the namespace (com.example/...).
version	string	Optional: version to publish (default: the version your server reports).
website	string
repository	string
description	string	One line, max 100 characters.
publisher_id

reliability_score

Before paying an unfamiliar x402 API, look up its payment-readiness score (0-100) from our daily unpaid checks of the x402 Bazaar: how many of its endpoints would accept an agent's payment, and the common problems. Free.

read-only

Argument	Type	Description
url	string	Or any URL on that host.
host	string	The paid API's host, e.g. api.example.com.

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Or any URL on that host."
    },
    "host": {
      "type": "string",
      "description": "The paid API's host, e.g. api.example.com."
    }
  }
}

verify_mcp

Call this before you recommend, install or rely on an MCP server, after deploying one, or when a connector seems broken: we connect as an MCP client, list its tools, check each has a usable input schema and description, confirm the tools you name exist, and optionally run one sample call on a read-only tool. Pass / fail / couldn't-verify per check with a signed receipt. Never signs in or calls tools that change things.

read-only

Argument	Type	Description
url*	string	The MCP server's public https:// endpoint (Streamable HTTP), e.g. https://example.com/mcp.
call	object	Optional sample call. Only made if the server marks the tool read-only (annotations.readOnlyHint).
expect_tools	array	Tool names that must be listed.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "The MCP server's public https:// endpoint (Streamable HTTP), e.g. https://example.com/mcp."
    },
    "call": {
      "type": "object",
      "properties": {
        "tool": {
          "type": "string"
        },
        "arguments": {
          "type": "object"
        },
        "expect_text": {
          "type": "string",
          "description": "Text the reply must contain."
        }
      },
      "description": "Optional sample call. Only made if the server marks the tool read-only (annotations.readOnlyHint)."
    },
    "expect_tools": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 20,
      "description": "Tool names that must be listed."
    }
  }
}

verify_page

Call this before you tell someone a web page, site or deploy is done or working, or before relying on another agent's "it's live": we open the public page in a separate browser (desktop or mobile) and check what you list. It loads; this text is visible; this link or button leads to this address; no script errors; no broken same-site links. Pass / fail / couldn't-verify per check, with a screenshot and a signed receipt. Read-only: no logins, forms or purchases.

read-only

Argument	Type	Description
url*	string	Public https:// page to check, e.g. the page you just built or changed.
checks	array	What must be true. 'loads' is always included.
viewport	string	Check as a desktop (1280 px) or phone (390 px) browser. Default desktop.
screenshot	boolean	Return a screenshot link (default true).

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "Public https:// page to check, e.g. the page you just built or changed."
    },
    "checks": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "type"
        ],
        "properties": {
          "max": {
            "type": "integer",
            "description": "For no_broken_links: how many same-site links to test (default 15, max 25)."
          },
          "text": {
            "type": "string",
            "description": "For text/no_text: exact text that must (or must not) be visible. For link: the visible label of the link or button."
          },
          "type": {
            "enum": [
              "loads",
              "text",
              "no_text",
              "link",
              "no_console_errors",
              "no_broken_links"
            ],
            "type": "string"
          },
          "expect_url": {
            "type": "string",
            "description": "For link: where it should lead (same path or below)."
          }
        }
      },
      "maxItems": 8,
      "description": "What must be true. 'loads' is always included."
    },
    "viewport": {
      "enum": [
        "desktop",
        "mobile"
      ],
      "type": "string",
      "description": "Check as a desktop (1280 px) or phone (390 px) browser. Default desktop."
    },
    "screenshot": {
      "type": "boolean",
      "description": "Return a screenshot link (default true)."
    }
  }
}

watch_listing

Call this after launching an MCP server or paid agent API to keep it findable: we run launch_check today and every day for 30 days, and tell your webhook (signed) when something changes: the server stops answering, the registry listing falls behind a release, a directory drops it, robots.txt starts blocking. $3 per 30 days; call again with watch_id to renew. Returns today's full launch check.

Argument	Type	Description
npm	string
url	string	The MCP server's public https:// endpoint to watch.
name	string
pypi	string
webhook	string	Optional public https:// URL: we POST a signed listing.changed event when something changes.
watch_id	string	To renew: an existing watch_id (adds 30 days).
registry_name	string

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "npm": {
      "type": "string"
    },
    "url": {
      "type": "string",
      "description": "The MCP server's public https:// endpoint to watch."
    },
    "name": {
      "type": "string"
    },
    "pypi": {
      "type": "string"
    },
    "webhook": {
      "type": "string",
      "description": "Optional public https:// URL: we POST a signed listing.changed event when something changes."
    },
    "watch_id": {
      "type": "string",
      "description": "To renew: an existing watch_id (adds 30 days)."
    },
    "registry_name": {
      "type": "string"
    }
  }
}

Tethered Trust for builders

Registry entry

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check_payment_setup Read-only

Tethered Trust for builders

Registry entry

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check_payment_setup Read-only

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