io.usefulapi/click2mail

None of its 22 tools are described as changing anything. For 22 the reading was uncertain, so no mark is shown.

• click2mail_get_credit

  “The prepaid credit balance of the Click2Mail account (`balance`) and whether the balance may go negative (`allowNegative`).”

  Publisher declares: read-only yes · destructive no · open-world yes

  Takes no inputs.

• click2mail_list_return_addresses

  “The addresses of one type saved on the account (return addresses, billing, business reply, courtesy reply, EDDM mailer addresses) with their ids; use an id as `return_address_id` when creating a job.”

  Publisher declares: read-only yes · destructive no · open-world yes

  1 input, 1 required

  • address_typestringrequired“Required by Click2Mail.”
• click2mail_get_product_options

  “The mail products and valid option combinations (document class, layout, production time, envelope, color, paper, print option, mail class) for the account.”

  Publisher declares: read-only yes · destructive no · open-world yes

  2 inputs

  • document_classstring“Only this product, e.g.”
  • skip_bulk_printboolean“Leave out bulk-print-only options.”
• click2mail_estimate_cost

  “Estimate the cost of a mailing from its print options and quantity without creating anything (nothing is charged).”

  Publisher declares: read-only yes · destructive no · open-world yes

  13 inputs, 8 required

  • document_classstringrequired“e.g.”
  • layoutstringrequired“e.g.”
  • production_timestringrequired“e.g.”
  • envelopestring“e.g.”
  • colorstringrequired“"Black and White" or "Full Color".”
  • paper_typestringrequired“e.g.”
  • print_optionstringrequired“e.g.”
  • mail_classstringrequired“e.g.”
  • quantityintegerrequired“Number of mail pieces.”
  • number_of_pagesinteger“Pages per piece.”
  • non_standard_quantityinteger“How many pieces are non-standard (optional).”
  • international_quantityinteger“How many pieces go abroad (optional).”
  • payment_typestring“Default "User Credit".”
• click2mail_list_documents

  “List the documents uploaded to the account (id, name, class, pages), most recent first.”

  Publisher declares: read-only yes · destructive no · open-world yes

  3 inputs

  • number_of_documentsinteger“How many documents to return, 1-100 (vendor default applies when omitted).”
  • offsetinteger“Zero-based offset into the result list (default 0).”
  • document_classstring“Only this class, e.g.”
• click2mail_get_address_list

  “Status of an uploaded address list: processing state (3 = CASS-standardized and ready for a job), name and counts.”

  Publisher declares: read-only yes · destructive no · open-world yes

  1 input, 1 required

  • address_list_idintegerrequired“Address list id from click2mail_create_address_list.”
• click2mail_get_address_list_info

  “Details of an address list: its addresses with the standardization result of each.”

  Publisher declares: read-only yes · destructive no · open-world yes

  3 inputs, 1 required

  • address_list_idintegerrequired“Address list id.”
  • limitinteger“How many addresses to return (vendor default 10).”
  • offsetinteger“Zero-based offset into the result list (default 0).”
• click2mail_check_addresses

  “Validate and standardize up to 100 US postal addresses (USPS/CASS correction) before mailing.”

  Publisher declares: read-only yes · destructive no · open-world yes

  1 input, 1 required

  • addressesarrayrequired
• click2mail_create_address_list

  “WRITE: upload a recipient address list (up to 500 addresses) to the account.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world yes

  2 inputs, 2 required

  • namestringrequired“A name for the list.”
  • addressesarrayrequired
• click2mail_upload_document_from_url

  “WRITE: have Click2Mail fetch a PDF (or other supported file) from a public http(s) URL and store it as a document on the account.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world yes

  4 inputs, 2 required

  • urlstringrequired“Public URL of the file.”
  • document_namestringrequired“A name for the document (must be unique on the account).”
  • document_classstring“The product the document is for, e.g.”
  • document_formatstring“File format, default "PDF".”
• click2mail_list_projects

  “List the account's projects (jobs are grouped by project; jobs without one are grouped by month, e.g.”

  Publisher declares: read-only yes · destructive no · open-world yes

  2 inputs

  • number_of_projectsinteger“How many projects to return, 1-100 (vendor default applies when omitted).”
  • offsetinteger“Zero-based offset into the result list (default 0).”
• click2mail_list_project_jobs

  “List the mailing jobs of one project (id, status, description).”

  Publisher declares: read-only yes · destructive no · open-world yes

  3 inputs, 1 required

  • project_namestringrequired“Exact project name, e.g.”
  • number_of_jobsinteger“How many jobs to return, 1-100 (vendor default applies when omitted).”
  • offsetinteger“Zero-based offset into the result list (default 0).”

Each quoted sentence is the first sentence of the publisher’s own description. The kind of tool and the “changes data” mark are our AI model’s reading of that description, not something we tested: two differently worded runs had to agree, otherwise no label is shown, and nobody has checked them by hand. A tool without the “changes data” mark is described as only reading, searching or calculating, or the two runs did not agree. No tool was called. Read the publisher’s full description before relying on it. “Publisher declares” lists the hints the server itself sends with the tool (MCP annotations: read-only, destructive, idempotent, open-world); they are the publisher's claims, not checked by us. Inputs are the parameters in the tool's own input schema: name, declared type, whether it is required, and the first sentence of its description. Read 2026-10-24.

The registry verifies a package once, when it is published, and does not re-check it. A difference below is about the listing, not a judgement of the publisher.